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GSM/EDGE RAN - BR line

Product descriptionBase transceiver station equipment

BS-240XL II product description

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The information in this document is subject to change without notice and describes only theproduct defined in the introduction of this documentation. This documentation is intended for the

use of Nokia Siemens Networks customers only for the purposes of the agreement under whichthe document is submitted, and no part of it may be used, reproduced, modified or transmittedin any form or means without the prior written permission of Nokia Siemens Networks. Thedocumentation has been prepared to be used by professional and properly trained personnel,and the customer assumes full responsibility when using it. Nokia Siemens Networks welcomescustomer comments as part of the process of continuous development and improvement of thedocumentation.

The information or statements given in this documentation concerning the suitability, capacity,or performance of the mentioned hardware or software products are given "as is" and all liabilityarising in connection with such hardware or software products shall be defined conclusively andfinally in a separate agreement between Nokia Siemens Networks and the customer. However,Nokia Siemens Networks has made all reasonable efforts to ensure that the instructionscontained in the document are adequate and free of material errors and omissions. NokiaSiemens Networks will, if deemed necessary by Nokia Siemens Networks, explain issues which

may not be covered by the document.Nokia Siemens Networks will correct errors in this documentation as soon as possible. IN NOEVENT WILL Nokia Siemens Networks BE LIABLE FOR ERRORS IN THIS DOCUMENTA-TION OR FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO SPECIAL, DIRECT, INDI-RECT, INCIDENTAL OR CONSEQUENTIAL OR ANY LOSSES, SUCH AS BUT NOT LIMITEDTO LOSS OF PROFIT, REVENUE, BUSINESS INTERRUPTION, BUSINESS OPPORTUNITYOR DATA,THAT MAY ARISE FROM THE USE OF THIS DOCUMENT OR THE INFORMATIONIN IT.

This documentation and the product it describes are considered protected by copyrights andother intellectual property rights according to the applicable laws.

The wave logo is a trademark of Nokia Siemens Networks Oy. Nokia is a registered trademarkof Nokia Corporation. Siemens is a registered trademark of Siemens AG.

Other product names mentioned in this document may be trademarks of their respectiveowners, and they are mentioned for identification purposes only.

Copyright © Nokia Siemens Networks 2008-2009. All rights reserved

f Important Notice on Product SafetyElevated voltages are inevitably present at specific points in this electrical equipment.Some of the parts may also have elevated operating temperatures.

Non-observance of these conditions and the safety instructions can result in personalinjury or in property damage.

Therefore, only trained and qualified personnel may install and maintain the system.

The system complies with the standard EN 60950 / IEC 60950. All equipment connected

has to comply with the applicable safety standards.

The same text in German:

Wichtiger Hinweis zur Produktsicherheit

In elektrischen Anlagen stehen zwangsläufig bestimmte Teile der Geräte unter Span-nung. Einige Teile können auch eine hohe Betriebstemperatur aufweisen.

Eine Nichtbeachtung dieser Situation und der Warnungshinweise kann zu Körperverlet-zungen und Sachschäden führen.

Deshalb wird vorausgesetzt, dass nur geschultes und qualifiziertes Personal dieAnlagen installiert und wartet.

Das System entspricht den Anforderungen der EN 60950 / IEC 60950. Angeschlossene

Geräte müssen die zutreffenden Sicherheitsbestimmungen erfüllen.

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Table of contentsThis document has 89 pages.

Reason for update . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91.2 Overview of the functionality - main features of BS-240XL II . . . . . . . . . . . 10

2 Technical data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

3 Hardware architecture. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 143.1 Rack configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

4 Module description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 204.1 Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

4.2 Core modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 244.2.1 Core basis (COBA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 264.2.2 Core satellite (COSA) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.2.3 Core link extension (COREXT) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 274.2.4 Core redundancy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 284.3 Carrier related modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.1 Carrier units (CU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.2 GSM carrier unit (GCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.3 EDGE carrier unit (ECU). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 304.3.4 Flexible carrier unit (FlexCU) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 314.3.5 Carrier unit output power level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 324.4 Antenna combining modules. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 334.4.1 Duplexer amplifier multicoupler (DUAMCO) . . . . . . . . . . . . . . . . . . . . . . . . 334.4.2 Flexible duplexer amplifier multicoupler (FDUAMCO) . . . . . . . . . . . . . . . . 344.4.3 MFDUAMCO. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 344.4.4 Hybrid extension module for MFDUAMCO (HYBRID4) . . . . . . . . . . . . . . . 354.4.5 Multiple duplexer (MDUX). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 354.4.6 Hybrid extension module for MDUX (HYBRID6). . . . . . . . . . . . . . . . . . . . . 364.4.7 Co-amplifier multicoupler (COAMCO8). . . . . . . . . . . . . . . . . . . . . . . . . . . . 374.4.8 Mast head amplifier / tower mounted amplifier (MHA/TMA) . . . . . . . . . . . . 374.4.9 Filter combiner with six TNFs (FICOM6). . . . . . . . . . . . . . . . . . . . . . . . . . . 39

4.5 Power supply modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.5.1 AC/DC system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 404.5.2 Backup battery (BATTPACK) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.5.3 AC/DC panel (ADP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 414.5.4 DC mains supply unit (MSU:DC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.5.5 AC mains supply unit (MSU:AC). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.5.6 DC and battery controller (DCBCTRL) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 424.5.7 DC panel (DCP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 434.5.8 DC link equipment breaker panel (DCP:LEBREAK) . . . . . . . . . . . . . . . . . . 434.5.9 Alarm collection terminal boards (ACTC, ACTP, ACTM) . . . . . . . . . . . . . . 434.6 Abis interface modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 454.6.1 Overvoltage protection and tracer (OVPT) . . . . . . . . . . . . . . . . . . . . . . . . . 45

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4.6.2 Abis connection (ABISCON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.6.3 Ethernet connector module (ETHCON) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 464.7 Overvoltage protection of external alarms (OPEXAL) . . . . . . . . . . . . . . . . . 47

4.8 Abis link equipment (LE) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.9 Dust filter (DUSTFILM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 484.10 Fan unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48

5 Antenna combining . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 495.1 MFDUAMCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 505.2 FDUAMCO / DUAMCO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 555.2.1 DUAMCO specials . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 585.2.2 FDUAMCO specials. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 605.3 MDUX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 625.4 COAMCO8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 675.5 Antenna line equipment MHA/TMA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 705.6 FICOM6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 745.7 Diplexer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6 Cell configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80

7 FCC issues (for U.S. market only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 86

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List of figuresFigure 1 BS-240XL II base rack. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14Figure 2 Functional blocks of a BS-240XL II (configuration example) . . . . . . . . . 15Figure 3 BS-240XL II base rack and extension rack . . . . . . . . . . . . . . . . . . . . . . 17Figure 4 Various BTS configurations with BS-240XL II service1A rack . . . . . . . . 18Figure 5 Various configurations of BS-240XL II service2 rack. . . . . . . . . . . . . . . 19Figure 6 Connection of core modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25Figure 7 Example of a configuration with COBA4P12 and COREXT . . . . . . . . . 28Figure 8 Example of a configuration with CESCOBA and COREXT . . . . . . . . . . 28Figure 9 FlexCU – Double TRX mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31Figure 10 FlexCU – Single TRX mode – Fourfold receive diversity mode. . . . . . . 32Figure 11 ABISCON and OVPT (100/120 Ω ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45Figure 12 Example of a configuration of a CESCOBA with ETHCON and COSA4P12

47Figure 13 MFDUAMCO block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Figure 14 HYBRID4 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53Figure 15 DUAMCO 2:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58Figure 16 DUAMCO 4:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 17 DUAMCO 8:2 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59Figure 18 FDUAMCO block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61Figure 19 MDUX block diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63Figure 20 HYBRID6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64Figure 21 MDUX-HYBRID6 configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65Figure 22 COAMCO8 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67

Figure 23 FDUAMCO in 4:2 mode with COAMCO8 (= 8:2 mode). . . . . . . . . . . . . 68Figure 24 COAMCO8 with MFDUAMCO and HYBRID4 (8/0/0) . . . . . . . . . . . . . . 69Figure 25 TMA (single) block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71Figure 26 MHA / TMA (dual) block diagram (RET only at MHA) . . . . . . . . . . . . . . 71Figure 27 FICOM6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77Figure 28 Configuration with diplexer (example) . . . . . . . . . . . . . . . . . . . . . . . . . . 79Figure 29 Multi-Cell (4,4,4): with 3 DUAMCO 4:2 . . . . . . . . . . . . . . . . . . . . . . . . . 80Figure 30 Single-Cell (12,0,0): with 2 DUAMCO 8:2 . . . . . . . . . . . . . . . . . . . . . . . 81Figure 31 Single-Cell (12,0,0): with 3 DUAMCO 4:2 . . . . . . . . . . . . . . . . . . . . . . . 81Figure 32 Multi-Cell (8,8,8): with 4 DUAMCO 8:2 (base and extension rack) . . . . 82Figure 33 Multi-Cell (12,12,0): with 4 DUAMCO 8:2 (base and extension rack) . . 82Figure 34 FDUAMCO configuration 2:2 or 4:2. . . . . . . . . . . . . . . . . . . . . . . . . . . . 83Figure 35 Configuration 8:2 with FDUAMCO and COAMCO8. . . . . . . . . . . . . . . . 83

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List of tablesTable 1 Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12Table 2 GSM frequency bands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13Table 3 Main units and modules (overview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20Table 4 Core configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Table 5 Carrier unit output power level (typical and guaranteed values) . . . . . . 32Table 6 Possible TMA substitutions with MHA . . . . . . . . . . . . . . . . . . . . . . . . . . 37Table 7 FICOM6 and FDUAMCO: Insertion losses – comparison . . . . . . . . . . . 39Table 8 MFDUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Table 9 MFDUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54Table 10 DUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Table 11 FDUAMCO: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56Table 12 DUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

Table 13 FDUAMCO: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57Table 14 MDUX: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Table 15 MDUX: Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66Table 16 MHA: electrical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Table 17 MHA: mechanical parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Table 18 TMA: electrical parameters (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . 73Table 19 TMA: mechanical parameters (guaranteed) . . . . . . . . . . . . . . . . . . . . . 73Table 20 FICOM6: Insertion loss . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78Table 21 FICOM6: Gain (guaranteed) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78Table 22 Power reduction of the carrier units (ECU/FlexCU 850) at antenna port .

84

Table 23 Power reduction of the carrier units (ECU/FlexCU 1900) at antenna port85

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BS-240XL II product description Reason for update

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Reason for updateIssue history

Issue 09, release independent, starting from release BR8.0

Antenna combining modules (4.4)

– New amplifier module MHA from BR9.0 onward

Antenna combining (5)

– New amplifier module MHA from BR9.0 onward

Antenna line equipment MHA/TMA (5.5)

– Chapter restructure due to new hardware MHA

Issue Date Summary

Issue history for this document with order number A30808-X3247-M023-*-7618

01 01/2005 New manual for new release BR8.0

02 04/2005 New issue



05 03/2006 Revision to harmonize the descriptions of BTS-TEDs

Issue history for this document with new order number A50016-G5100-A023-*-7618

01 11/2006 Expansion of the manual due to new 900/1900 MHZ dual bandconfiguration and revised chapters for BR8.0

02 12/2006 Expansion of the manual due to new release BR9.0

03 04/2007 Expansion of the manual due to new hardware (RSCU,COREXT-R, OVPTEXT) in chapters 1 and 3

Revised/new tables (gains, losses, other parameter) in chapter 4

04 07/2007 Expansion of the manual due to new hardware (RSSU andMFDUAMCO/HYBRID4)

05 12/2007 Expansion due to new hardware MDUX and HYBRID6 for BR9.0

06 02/2008 Expansion of the manual due to new hardware (FICOM6) andminor changes

07 07/2008 Expansion of the manual due to new release BR10.0

08 11/2008 Additions related to new modules CESCOBA and ETHCON; edi-torial changes

09 03/2009 Expansion of the manual due to new antenna line equipmentMHA and minor changes

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BS-240XL II product description Introduction

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1 Introduction

1.1 GeneralThis manual is applicable for the releases from BR8.0 onward.

The architecture of the BS-240XL II provides maximum flexibility to develop highestcapacity BTSs with reduced volume per TRX and an expanded number of 24 TRXs in2 racks (48 TRXs with FlexCU).

The BS-240XL II is an evolution of the BS-240XL product line and represents themainline of the base stations. The modifications represent the latest state of technologywhile maintaining the outstanding RF performance and conserving backward compati-bility with existing base station systems.The modular design principle with a low number of different modules ensures easyinstallation, commissioning and operating, as well as low training costs and mainte-nance expenses with a minimal spare parts pool required. The advanced technologyguarantees low operational costs and an optimum economy of scale. Homogenousservice throughout the network is assured by common BTS software running on all theplatforms.

The modular architecture and the flexible internal structure enable the BS-240XL II toprovide new GSM features such as enhanced data rates for GSM evolution (EDGE).This platform ensures that network evolution is as smooth as possible.

Any operation for rack extension or TRX substitution doesn’t involve service interruption.And also software-driven redundancy for core, power supply and broadcast channelmodules offer highest reliability end enable hot swapping of modules without service

interruption.The provision of a full spectrum of combining equipment allows high power and mini-mized number of antennas in connection with a high receiver sensitivity.

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Introduction

1.2 Overview of the functionality - main features of BS-240XL II• Casing variants: Indoor version only

• Minimum configuration: – one base rack with up to 24 TRX

• Maximum configuration: – 2 racks with an entire quantity of 48 carriers (1 base and 1 extension rack) – 5 racks housing power supply modules, battery backup and link equipment

(service1A and service2 racks)

• Cell configurations: – Single cell – Multi cell

– Up to 6 cells per rack – Up to 12 cells per BS-240XL II – Concentric omnicell: one cell with inner and complete supply area – Concentric multicells: multicell with several sectors plus inner supply area

• Frequency configurations: – Single band (GSM 850, GSM 900, GSM 1800 and GSM 1900) – Dual band (see below) – Mixed cell configuration to enlarge GSM 900 cells with GSM 1800 frequencies,

or GSM 850 cells with GSM 1900 frequencies

• Dual band configurations:

– GSM 900 and GSM 1800 – GSM 900 and GSM 1900 – GSM 850 and GSM 1900

• Frequency hopping – Synthesizer frequency hopping – Baseband frequency hopping

• Combining options: – Antenna combining with duplexers ((MF/F)DUAMCO and COAMCO) for up to

8 carriers with RF amplifier and multicoupler for the RX path;from BR9.0 on also MDUX is available

– Antenna combining for the TX path with filter combiners (FICOM) for up to8 carriers per antenna

– Antenna combining for the RX path with amplifying multicouplers (DIAMCO) for up to 24 carriers

– Duplexing of RX and TX path with high power duplexer (HPDU) – Mixed Configurations of cells/sectors applying all types of carrier units: normal

carrier units (CU and GCU), EDGE carrier units (ECU) and flexible carrier units(FlexCU)

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• Traffic channels: – Full rate (FR) – Half rate (HR)

– Enhanced full rate (EFR) – Adaptive multi rate codec (AMR)

• Services: – GPRS – HSCSD – EDGE

• Redundancy: – Support of 1:1 core redundancy – Support of BCCH redundancy – Support of TRX redundancy without using any second frequency

(from BR10 on) – Support of n+1 power supply redundancy

• Abis interface configurations: – Star, cross connect, loop and multidrop configurations are possible – Change of PCM line configuration from star to multidrop or loop and vice versa

is possible without any interruption of service

• External Abis link media can be connected via E1/T1: – Wire – Fiber optic – Microwave

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Technical data

2 Technical data

Characteristics BS-240XL II (indoor)

Dimensions base rack (H x W x D) 2025 mm x 600 mm x 450 mm(6’7” x 2’ x 1’5”)

Max. TRX per BTS (in more than one rack) 24 (48 with FlexCUs)

Max. TRX per cell (with FlexCUs in one rack; withoutFlexCUs in more than one rack)

24

Volume net 547 liters

Typical power consumption base rack 1845 W with CU2640 W with ECU3500 W with 12 FlexCU

Typical power consumption extension rack 1745 W with CU2520 W with ECU3375 W with 12 FlexCU

Weight of basic racks in typical configuration ca. 250 kg (551 Lbs)

Weight of extension racks in typical configuration ca. 250 kg (551 Lbs)

Weight of service1 rack in configuration:AC/DC (2x); F:Battery 2x (type A400/85)

ca. 425 kg (937 Lbs)

Weight of service2 rack in configuration:F:Battery 3x (type A400/85)

ca. 510 kg (1124 Lbs)

Temperature range -5 °C to + 45 °C+23 °F to +113 °F

Ingress protection rating IP20

Table 1 Technical data

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Hardware architecture

3 Hardware architectureThe BS-240XL II is designed to serve 12 carrier units in one rack. Figure 1 shows thebase rack.

Figure 1 BS-240XL II base rack

The BTS functional blocks of the BS-240XL II are shown in Figure 2

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BS-240XL II product description Hardware architecture

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Figure 2 Functional blocks of a BS-240XL II (configuration example)

Base Rack

Service Rack

carrier units

ACTM

CC-Links

RX

RXDIV

ACTC ACTP

LE 0 LE 1

BATTERY

DCBCTRL

ACP

ACTC

FAN

Cell 0

ACTC ACTP

FAN

AC/DC

DCP

DCP

DCP

Extension Rack

COBA2 PCM

Ext. Sync.

2 PCM

4 PCM

Abis

Sync.

Abis

FAN

3xTX

3xTX

RX

RXDIV

3xTX

3xTX

Cell 1

RX

RXDIV

3xTX

3xTX

RX

RXDIV

3xTX

3xTX

Cell 2

Cell 3

OVPT

OVPT

CAN BUS

OASI

(e.g. FlexCU) (e.g.COBA4P12)0 .. 5

carrier units(e.g. FlexCU)

6 .. 11


0 .. 5


6 .. 11

COSA(e.g.

COSA4P12)

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

MFDUAMCO

duplexer,e.g.

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The architecture of BS-240XL II provides maximum flexibility to develop large and smallBTSs.

The main communication between the modules is provided by means of bi-directionalserial links ( CC-Link s) between the carrier units and the core modules. These CC-linkshandle the entire communication between BTS core and carrier units. Baseband fre-quency hopping is also supported.

All alarms, besides the alarms generated in the COBA and in the carrier units, are trans-ported via the CAN bus. Alarms of the carrier units are transmitted via CC-link.

The carrier unit provides all analog and digital signal processing including an RF power stage necessary to process a single carrier (e.g. GSM 8 TCH s). The carrier unit(s) inter-face with the combining equipment on the one side and with the core modules on theother. The core modules provide functions common to all carriers within the BTS (e.g.clock generation, O&M processing,...) as well as LAPD processing for the carriers.

3.1 Rack configurationThe BS-240XL II with 12 TRXs per rack (24 with FlexCUs), expandable up to 24 TRXs(48 with FlexCU) in 2 racks, is supplied for indoor installation.

There are four different rack types: – Base rack (with core modules) – Extension rack (when more then 12 carrier units are required) – Service1A rack (with AC/DC, LE and batteries) – Service2 rack (for LE and batteries)

Figure 3 shows the BS-240XL II configured with 24 TRX.

Legend:

AC/DCACPACTCACTMACTPCANCOBACOSADCBCTRLDCPDIAMCOMFDUAMCO

FlexCULEOASIOVPT

AC/DC Rectifier AC PanelAlarm Collection Terminal ConnectionAlarm Collection Terminal Master for base rack (optional)Alarm Collection Terminal Processor for extension and slave rackController Area NetworkCore BasisCore SatelliteDC and Battery Controller DC PanelDI(2) Amplifier Multicoupler Multi-Standard Flexible Duplex Amplifier Multicoupler

Flexible Carrier UnitLink EquipmentOperator Available Serial InterfaceOver Voltage Protection

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Figure 3 BS-240XL II base rack and extension rack

g Six ACOM slots are necessary when the extension rack of the BS-240XL II isequipped with FlexCU.

Legend:

ACOM Antenna combining module

ACOM0

ACOM1

ACOM2

ACOM

3

CU4

CU5

CU10

CU

11

CU0

CU1

CU6

CU7

C O B A

0

C O S A

0

C O B A

1

C O S A

1

ACOM0

ACOM1

ACOM2

ACOM

3

DC-PANELACT-C

CU

4

CU5

CU10

CU

11

CU0

CU1

CU6

CU7

FAN 0 FAN 1

DC-PANELACT-C

FAN 0 FAN 1

FAN 2 FAN 3

FAN 6 FAN 7

FAN 2 FAN 3

FAN 6 FAN 7

CU2

CU3

CU8

CU9

CU

2

CU

3CU8

CU9

FAN 4 FAN 5 FAN 4 FAN 5

ACOM5

ACOM

4

5

4

ACOM

ACOM

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The service racks (see Figure 4 and Figure 5 ) satisfy various applications depending onthe number of carrier units configured and/or the number and kind of network termina-tion equipment provided and the battery backup time required.

There are two basic kinds of service racks: one with the AC/DC system (service1A rack)and one for installation of LE and batteries (service2 rack).

Figure 4 Various BTS configurations with BS-240XL II service1A rack

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Figure 5 Various configurations of BS-240XL II service2 rack

AC power supply by Eltek rack

A DC-supplied BTS can also be powered by an Eltek power supply rack. The Eltekpower supply rack is applicable for indoor use.

For more information, ask your sales representative.

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Module description

4 Module description

4.1 OverviewName/Type F-V 1) Remarks

Core modules:COBACOSACOREXT

M:COBA2P8VxM:COBA4P12VxM:CESCOBAVxM:COSA6P16M:COSA4P12M:COREXTVx

No Core basis, core satellite and core link extensionmodules (the last two modules increase the number of PCM lines and CC-links) can be equipped only inthe base rack.They provide up to 8 PCM lines.

CU CUGVxCUDVxCUPVx

Yes Carrier units receive and convert RF signals intoTRAU frames/signaling data (for uplink) and viceversa (for downlink).

The carrier units can be equipped in the base andextension racks.All types may be mixed.

GCU GCUGVxGCUDVx

Yes

ECU ECU850HPVxECU850VxECUGVxECUDVx, ECUDHPVxECUPVx, ECUPHPVx

Yes

FlexCU FCU850VxFCUGVxFCUDVxFCUPVx

Yes

DUAMCOFDUAMCOMFDUAMCOHYBRID4MDUXHYBRID6COAMCO8FICOM6

DUAMCO2xDUAMCO4xDUAMCO8xFDUAMCO (x:2 mode)MFDUAMCO850VxMFDUAMCOEGVxMFDUAMCOPGVxMFDUAMCOPS5VxMFDUAMCOREVxMFDUAMCODVxMFDUAMCOPVxHYBRID4G8VxHYBRID4DPVxMDUXDVxMDUXEGVxMDUXPGVxHYBRID6DPVxHYBRID6G8VxCOAMCO8DPVxCOAMCO8G8Vx

Yes Antenna system modules can be equipped in thebase and extension racks.

The MFDUAMCO is the successor of the FDUAMCO.The hybrid extensions are available for 850/900 MHzand for 1800/1900 MHz.

MDUX and HYBRID6 are available from BR9.0 on.

The FICOM6 is available from BR9 on.

Table 3 Main units and modules (overview)

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BS-240XL II product description Module description

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TMA TMAxSTMAxDTMAx

Yes Optional module that connects the antenna with theBTS in order to amplify the receive signal and passthrough the transmit signal. Different TMAs are avail-able for different transmit frequencies.

MHA MDTA850VxMDGA900VxMDDA1800VxMDPA1900Vx

Yes Mast head amplifiers are optional modules thatconnect the antenna with the BTS in order to amplifythe receive signal. MDxA are feasible only with BTSversions from BR9.0 onward with MFDUAMCO or with FICOM6. Different MHAs exist for different fre-quency bands.

OVPTABISCON

M:OVPTVxM:OVPTKOAXVxM:ABISCONVxM:ABISCONCXVx

No The overvoltage protection and tracer and the Abisconnection modules are optional modules and can beinstalled alternatively. It: – can be equipped in the base rack – supports 100 Ω /120 Ω balanced line or 75 Ω

coaxial line

ETHCON ETHCONVx No The Ethernet connector module is necessary tosupport the CESoPSN functionality in combinationwith a CESCOBA.

LE ---- No The Abis link equipment is an optional customer-supplied module and acts as the front end to providethe Abis interface in service1A and service2 racks.

AC/DC system AC/DCDVxAC/DCAVx

No AC/DC rectifier used for AC power (can be equippedin the service1A rack).

DC and batterycontroller

DCBCTRLDVxDCBCTRLAVx.

No Supervision of the AC/DC converter and of the con-nected battery systems (in service1A and service2racks).

Battery BATTPACKVx No Backup batteries are mandatory for AC-suppliedsystems and must be installed in the service racks.

DCP DCP:R12-2BVxDCP:R12-2EVx

No The DC panel is used for distribution of -48 V DC andcan be equipped in the base and extension rack.

ADP ADPAVxADPA/UVxADP-2Vx

No The ADP connects the BTS to the AC supply line; itmust be installed in the service1A rack.

LE breaker panel DCP:LEBREAKVxDCP:LEBREAK2Vx

No The LE breaker panel provides the distribution of the-48 V supply voltage to the modules within the serviceracks.

Name/Type F-V 1) Remarks

Table 3 Main units and modules (overview) (Cont.)

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Module description

ACTCACTPACTM

ACTC-yVxACTPVxACTMVxACTM24Vx

No Alarm collection modules: – ACTC is equipped in each rack

(e.g. ACTC-3V1) – ACTM can be equipped in the base rack. – ACTP is equipped in each extension and service

rack

MSU AC MSU:AC3PH-2VxMSU:AC3PHVxMSU:AC2PH80UVxMSU:BASV2

No Mains supply unit for AC.

MSU DC MSU:DC100AVxMSU:LPDC80-2Vx

MSU:DCVxMSU:BASV4MSU:100ADCVx

No For external DC lines and upgrade kit for lightningprotection. Can be equipped in the base, extension

and service2 racks.

OPEXALEAP

OPEXAL10VxEAPBVx

No Optional lightning protection module for the ACTMalarm input lines.

Fan FANVxFAN-NIVx

No Fan units are mandatory for each rack.

Dust filter DUSTFILM-2Vx No Optional module for indoor, alternatively to MEF, for cleaning the cooling air

Rack R:BS120-2Vx No One type of rack for all.

Frames F:AC/DCAVxF:AC/DCDVxF:ACOMCUVxF:ACOMVxF:BATTRAYVxF:BATTRAYBV3F:CORECUVxF:CUVxF:FAN-2VxF:NTVx

No Each of the frames is necessary for installing theequipment.

Cover parts CP:20MMBFxCP:ACDCAVxCP:ACDCDVxCP:ACOMVxCP:ACTVxCP:AIRINLETVxCP:COSA/COBAVxCP:CUVxCP:DIAMCOVx

No Cover parts close the unequipped slots to ensure theairflow inside the rack. Cover parts are absolutelymandatory to force air flow through modules pluggedand avoid bypassing.



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Mounting kits MK:AIRBRVxMK:AIRGUIDEVxMK:BATTERYVxMK:BATTPACKVxMK:CAR12-2xxxVxMK:CAR12-2S1UVxMK:CARSH-ISSVxMK:COREXTB/EVxMK:EAPB-BOXRV1MK:EMCR-2VxMK:EQ4RVxMK:ETHCONSHVxMK:FOCVx

MK:LE6R-2VxMK:NO-DISVxMK:OPEXALVx

No There are some mounting kits for cabling and installa-tion inside and outside the racks, e.g. for: – air duct – rack cabling – cabling for Inter Site Synchronization (optional) – earth quake equipment – prevention of battery deep discharge

1) "Yes" indicates that the module has variants for different frequencies.



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Module description

4.2 Core modulesCore modules include COBA board, COSA board and COREXT board.

The core modules have the following tasks inside of the BTS:• local controlling of the entire BTS• generation of system clocks• providing of up to 8 Abis interfaces (PCM30/24) to BSC or other BTSs• providing of up to 24 CU interfaces• providing interfaces to internal and external alarms• providing an interface to the LMT/OMT• providing an interface for external clock synchronization• handling and processing of O&M messages

Core redundancy is supported (see Core redundancy ).

Three families of core modules exist:1. COBA2P8, COSA6P162. COBA4P12, COSA4P12, COREXT3. CESCOBA (from BR10 onward)

A mix of COBA2P8/COSA6P16 with COBA4P12/COSA4P12/COREXT or withCESCOBA, e.g. COBA4P12 and COSA6P16, is not allowed. A mix of CESCOBA withCOSA4P12/COREXT is possible for certain combinations. See Table 4 for the allpossible configurations for CESCOBA with COSA4P12/COREXT.

In case of CESCOBA configuration, an ETHCON is always necessary.

Combination of coremodules

Abislines

CUinter-faces

Abiscross-

connect

CU slots

0…7 *Base

cabinet

CU slots

8…11 *Base

cabinet

CU slots

0…11 *Ext.

cabinet

Coreredun-dancy

COBA2P8 2 8 yes

COBA2P8 + COSA6P16 8 24 yes yes yes yes

2 COBA2P8 2 8 yes yes

2 COBA2P8 + 2 COSA6P16 8 24 yes yes yes yes yes

COBA4P12 2 8 yes

COBA4P12 + COREXT 4 12 yes yes yes

COBA4P12 + COSA4P12 8 24 yes yes yes yes

2 COBA4P12 2 8 yes yes

2 COBA4P12 + 2 COREXT 4 12 yes yes yes yes

2 COBA4P12 + 2 COSA4P12 8 24 yes yes yes yes yes

CESCOBA 0 8 yes** yes

CESCOBA + COREXT 0 12 yes** yes yes

CESCOBA + COSA4P12 4 24 yes** yes yes yes

2 CESCOBA 0 8 yes** yes yes

2 CESCOBA + 2 COREXT 0 12 yes** yes yes yes

2 CESCOBA + 2 COSA4P12 4 24 yes** yes yes yes yes

Table 4 Core configurations

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Core boards have a common backplane. The connection of the core modules with theOVPT/Abis interface and the carrier units is done via cables, which are plugged into thebackplane.

Figure 6 Connection of core modules

Hot plug-in: A hot plug-in of COBA and COSA is possible. This means that theseboards can be plugged in/out with voltage switched on without disturbing other HW

inside the rack (no loss of data on other boards) and without destroying other boards.After the plug-in of a core board, this board is in "reset" state and all bus drivers of external busses are in tristate. These drivers will be enabled not before initialization of the devices, which serve the external busses.

*) CU Slots supported by the core equipment

**) via IP connections only

Combination of coremodules

Abislines

CUinter-faces

Abiscross-

connect

CU slots0…7 *

Basecabinet

CU slots8…11 *

Basecabinet

CU slots0…11 *

Ext.cabinet

Coreredun-dancy

Table 4 Core configurations (Cont.)

OVPT CU

COBA COSA COBA red. COSA red. Abis

Abis Abis Abis Abis

CC-Link CC-Linkotherinterfaces

CUs

CC-Link CC-Link

CU

Base rack Extension rack

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Module description

4.2.1 Core basis (COBA)The COBA is the central board of the core. The main components of this board are thebase core controller, the advanced clock generation, the serial link interface controller

that manage the external interface towards the carrier units, the PCM30/24 Abis inter-faces, the internal system alarm interface, and also an interface to one COSA to expandthe BTS.

The COBA has to be installed in the base rack.

Types of COBA:• M:COBA2P8Vx• M:COBA4P12Vx• M:CESCOBAVx

g Name convention for COBAs and COSAs:The first digit gives the number of Abis interfaces, the following letter gives the kind

of Abis interface (e.g. P for PCM30/24), and the following number gives the number of carrier unit interfaces ( CC -links).For example:COBA 2P8 means 2 PCM30/24 Abis interfaces and 8 carrier unit interfaces.COBA 4P12 means 4 PCM30/24 Abis interfaces and 12 carrier unit interfaces.

The base core controller maintains the software of all BTS units in FLASH-EPROMs,monitors the software download, and terminates all internal system alarms. Beside theO&M functions, the controller handles the signaling messages between the core and thecarrier units (CC-link).

The ACLK generates the system specific timing signals that are distributed by theCC-link to the carrier units.

The "cross connect" feature is supported. To provide this feature, additional coremodules are required:• With COBA2P8: A COSA6P16 must be installed additionally.• With COBA4P12: Either a COSA4P12 or a COREXT must be installed additionally.• With CESCOBA: Either a COSA4P12 or a COREXT must be installed additionally.

The CESCOBA module (available from BR10 onward) is required if Circuit EmulationService over Packet functionality shall be applied.

The CESCOBA is a COBA version for the BTSE family which is designed to carry TDMtraffic (Abis) over a packet network without external equipment. TDM to Packet inter-working functionality is based on the Pseudo Wire emulation Edge-to-Edge mechanism

(PWE3), which allows the transport of all relevant parts of a service, such as E1/T1 lines,over a packet switched network. This kind of emulation is called Circuit EmulationService over Packet Switched Network (CESoPSN). For more information aboutCESoPSN functionality, see the feature description “FD10560: Internal Ethernet/IPinterfaces for BSS”.

The CESCOBA must not be mixed with COBA4P12, COBA2P8 or COSA6P16.One (or two) CESCOBA module(s) can only be configured in combination with one Ethernetconnector module (ETHCON) .

Core redundancy is possible (see Core redundancy ).

Fault propagation through dependent modules

If core redundancy is not installed and a failure in the COBA module occurs , the entireBTS goes out of service until the faulty COBA module is replaced.

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Module description

Figure 7 Example of a configuration with COBA4P12 and COREXT

Figure 8 Example of a configuration with CESCOBA and COREXT

4.2.4 Core redundancyTo fulfill the core redundancy aspects, a redundant COBA can be installed. In case of aserious fault to the active COBA, the redundancy algorithm switches to the passive one.

One of the COBAs is active and one passive. The passive one is waiting for its activationin case of a failure within the active core.

Both cores (#0 and #1) have link interfaces to the Abis lines, but only one (the active

core) is connected.

CU CU CUCU

COBA4P12COREXT

CU CU

CU CU CU CU CU CU

2x Abis2x Abis

B A S E R A C K X L

C E S C O B ACO REX T /

COSA4P12

LMT/

T PC

ACT

C AN

cu c u c u c u

cu c u c u c u

ANTENN A COMB.

c u c u

c u c u

E T HCON

ET H4 xAb is

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If the core consists of a combination of COBA and COSA or COBA and COREXTmodules, each of these modules must be installed twice.

Both, the active and the passive core have links to the carrier units. In reverse, each

carrier unit is linked with both cores. The traffic data are transmitted transparentlythrough the active core. Signal processing takes place only within the carrier units.

The redundancy interface is realized as a 2 Mbit/s HDLC link which provides a commu-nication interface between the two main microprocessors.

The ACLK of the active core is connected with the one on the passive core. It allows thepassive ACLK to be synchronized to the active one.

g With core redundancy, a mixed configuration with COBA2P8 and COBA4P12 in thesame BTS is not allowed.

g Redundancy is implemented in a cold-standby mode, i.e., all calls will get lost if acore switch over occurs.

Fault propagation through dependent modules in case of core redundancy

The redundant implemented COBA is a "cold" one, that means no data synchronizationbetween the two COBAs.

If core redundancy is installed and a failure in the active COBA module occurs, all callswill be lost and the BSTE switches to the stand-by COBA without any further serviceinterruption.

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Module description

4.3 Carrier related modulesThe carrier unit takes care of all carrier oriented tasks. In the uplink (UL) direction, twoor four RF signals (diversity) are received and finally converted into TRAU frames and

signaling data. In the downlink (DL) direction, TRAU frames and signaling data arereceived from the core and converted into a GMSK or 8PSK modulated RF signal, whichis amplified to the desired power level.

Different types of carrier related modules can be used: carrier units (CUs and GCUs),EDGE carrier units (ECUs), and flexible carrier units (FlexCUs). Each carrier unit can bereplaced by another without any additional hardware change.

• An ECU is similar to a GCU but with the additional support of 8PSK modulation. Itconverts the signaling and traffic data into a GMSK or 8PSK modulated signal.

• A FlexCU is a complete two-carrier unit and its two TRX s can be configured inde-pendently, e.g. into different sectors; GMSK and 8PSK modulated signals are sup-

ported.CU, GCU, ECU and FlexCU modules may be installed in any kind of mixed configura-tions.

For the typical and the guaranteed values of RF output power level, see section Carrier unit output power level .

4.3.1 Carrier units (CU)The CU is a carrier unit variant which supports GMSK modulation. Different variants of CUs for the several frequency bands GSM 900, GSM 1800 and GSM 1900 exist (seealso Table 5 ).

4.3.2 GSM carrier unit (GCU)The GCU is a carrier unit variant that supports GMSK modulation.

Different variants of GCUs for the frequency bands GSM 900 and GSM 1800 exist (seealso Table 5 ).

4.3.3 EDGE carrier unit (ECU)The ECU can support EDGE functionality in uplink and downlink. In downlink direction,the signaling and traffic data are received from the core and converted into GMSK or

8PSK modulated signals which are amplified to the desired power level. With the intro-duction of EDGE, it is possible to mix EDGE and non-EDGE timeslots on the samecarrier.

Different variants of ECUs for the several frequency bands GSM 850, GSM 900,GSM 1800, and GSM 1900 exist (see also Table 5 ).

The mechanical design of ECU is identical to that of all other CU versions; it is thereforehardware compatible and fits into all BTS racks.

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4.3.4 Flexible carrier unit (FlexCU)The FlexCU is a complete two-carrier unit. It is based on the ECU keeping the samedimensions. Its two TRXs can be configured independently, e.g. into different sectors,

and can therefore increase the system reliability. The FlexCU either acts as two inde-pendent ECUs or as one carrier unit with four receivers, the so called "fourfold receivediversity" mode. To improve the downlink in fourfold receive diversity mode, it is recom-mended to activate the feature "Transmission Diversity Time Delay".

In uplink direction, four RF signals are received and converted into traffic and signalingdata. In downlink direction, traffic and signaling data are received and converted into twoGMSK or 8PSK modulated signals which are amplified to the desired power level.

By using FlexCUs instead of other carrier units, the number of carriers within the existingrack(s) can be doubled. This is an ideal solution to double the capacity of BTSs, anadvantage not only for footprint restricted BTS sites.

A working FlexCU requires about 30% less power than two ECUs. As soon as a TRX isidle, the transmitter (TX) is switched off. With this enhanced power saving mode, theoverall power consumption of an idle FlexCU (both TRXs in idle state) is only about40 W.

The FlexCU supports all frequency bands: GSM 850, GSM 900, GSM 1800, andGSM 1900. One type for each frequency band exists (see also Table 5 ).

FlexCU operation modes

FlexCUs may operate in two different modes: the double and the single TRX mode.

The double TRX mode is the default configuration of a FlexCU, with full support of MCS-1 to MCS-9 in uplink and downlink. It functions like two independent ECUs withcomplete twofold EDGE TRX functionality: Each of both transceivers shows a full-equipped main receiver and diversity receiver.

Figure 9 FlexCU – Double TRX mode

The so called fourfold receive diversity mode is the single TRX mode in which theFlexCU functions as one carrier unit with four receivers. If transmit diversity is enabled,this mode is automatically activated.

The four receivers of the FlexCU are fed by four independent antennas via one(F)DUAMCO together with one DIAMCO.

The TX path is fed via the (F)DUAMCO to two of the four antennas.

The fourfold receive diversity mode enhances the receiver sensitivity of the BTS. Thedoubled number of the RX paths leads to an enhanced diversity gain.

TX0

TX1

RX-N0RX-Div0

RX-N1RX-Div1

SignalProcessing

Combiner(s) TX0

TX1

RX-a

TX0RX-b

RX-cRX-dRX-d

RX-bRX-b

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Figure 10 FlexCU – Single TRX mode – Fourfold receive diversity mode

4.3.5 Carrier unit output power levelThe typical and the guaranteed values of RF output power level per TRX are listedbelow for CUs, GCUs, ECUs and FlexCUs, dependent on its frequency bands and mod-

ulation types (GMSK and 8PSK). The values in "Watt" are rounded.

g For the U.S. market, you can find the power reduction of the carrier units for 850

MHz and 1900 MHz in chapter FCC Issues .

TX0

TX0

RX-NRX-Div0

RX-Div1RX-Div2

SignalProcessing

Combiner(s) TX0

TX1

RX-a

TX0RX-b

RX-cRX-dRX-d

RX-bRX-b

Frequencyband

Carrier unittype

TypicalRF output power

GuaranteedRF output power

GMSK 8PSK GMSK 8PSK

dBm Watt dBm Watt dBm Watt dBm Watt

CU/GCU GSM 900 CUGV3 / V4 47.3 54 -- -- 47.0 50 -- --

GCUGV2 47.3 54 -- -- 47.0 50 -- --

GSM 1800 CUDV3 / V4 45.7 37 -- -- 45.4 35 -- --

GCUDV2 47.3 54 -- -- 47.0 50 -- --GSM 1900 CUPV4 45.7 37 -- -- 45.4 35 -- --

ECU GSM 850 ECU850HPV2 48.3 68 46.3 43 48.0 63 46.0 40

ECU850V3 / V3A 48.3 68 46.3 43 48.0 63 46.0 40

GSM 900 ECUGV3 / V3A 48.3 68 46.3 43 48.0 63 46.0 40

GSM 1800 ECUDV2 47.3 54 45.3 34 47.0 50 45.0 32

ECUDHPV3 / V3A 48.3 68 45.3 34 48.0 63 45.0 32

GSM 1900 ECUPV2 47.3 54 45.3 34 47.0 50 45.0 32

ECUPHPV2 48.3 68 45.3 34 48.0 63 45.0 32ECUPHPV3 / V3A 48.3 68 45.3 34 48.0 63 45.0 32

FlexCU GSM 850 FCU850V1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 900 FCUGV1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 1800 FCUDV1 47.0 50 44.0 25 46.7 47 43.7 23

GSM 1900 FCUPV1 47.0 50 44.0 25 46.7 47 43.7 23

Table 5 Carrier unit output power level (typical and guaranteed values)

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4.4 Antenna combining modulesVarious types of combining modules are available. Each type comes in various modulesand is associated with various frequency bands.

The BTS can work with three different amplifier multicouplers: e.g. with the DUAMCO,its successor FDUAMCO, or the MFDUAMCO, which offers the most flexible way tocombine.

The filter combiner FICOM6 offers the same advantages like MFDUAMCO but withlower insertion loss for a high number of TRXs per cell.

4.4.1 Duplexer amplifier multicoupler (DUAMCO)The DUAMCO consists of two identical modules. Each of the DUAMCO modulescombines the transmit and receive paths to one antenna. It splits the receive signal tobe used in the carrier units and serves as a duplexer unit, which provides filtering func-tions for both, RX and TX paths and low noise amplification for the RX path.

Different versions of DUAMCO are available for each frequency band.

Different DUAMCO versions provide different functionality:• a DUAMCO 2:2 module connects one carrier to one antenna• a DUAMCO 4:2 module connects up to two carriers to one antenna• a DUAMCO 8:2 module connects up to four carriers to one antenna

g It is possible to implement DUAMCO/FDUAMCO modules of different frequencybands, but:All combining equipment in a cell must support the same frequency range (thatmeans either GSM 850, or GSM 900, or GSM 1800, or GSM 1900).

g Use FDUAMCORE modules for the GSM-RE 900 MHz band.

It is possible to install up to six DUAMCO 2:2 or DUAMCO 4:2 and up to twoDUAMCO 8:2 respectively in one rack.

g DUAMCOs of different versions have a different TX attenuation.

The DUAMCO is equipped with complete TMA interfaces for DC supply and signaling.For more information, see Antenna Combining - FDUAMCO/DUAMCO .


Each amplifier of the DUAMCO RX path ( LNA ) consists of two parallel branches. If onlyone branch of one amplifier has a failure, the amplifier will reach lower sensitivity and

generates a warning. The operation continues with performance degradation.If more than one branch of the whole amplifier chain is faulty, the corresponding path of the receiver will not be ready for operation. The connected carrier units lose one of their RX paths (normal or diversity path). The operation continues without diversity feature. If a carrier unit loses both RX paths, it will be configured out of operation.

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4.4.2 Flexible duplexer amplifier multicoupler (FDUAMCO)The FDUAMCO is the successor of the DUAMCO. It consists of two identical modules,which each combine the transmit and receive paths to one antenna.

Each FDUAMCO module may be operated in one of the following modes (by jumper set-tings):• 2:2 mode: 1 carrier is fed to the antenna port• 4:2 mode: 2 carriers are combined and fed to the antenna port

Within each cell/sector the same mode of the FDUAMCO shall be installed.

All RX and RXCA outputs of FDUAMCO which are not connected to RX input of a carrier unit, shall be terminated with 50 Ω load resistor. The termination is not required if anFDUAMCO module is not used in the cell configurations.

The FDUAMCO can be combined with a COAMCO8 module to support more carrier units.

The FDUAMCO is equipped with complete TMA interfaces for DC supply and signaling.For more information, see Antenna Combining - FDUAMCO/DUAMCO .

4.4.3 MFDUAMCOThe MFDUAMCO is the successor of DUAMCO and FDUAMCO. It consists of two iden-tical modules, which each combines the transmit and receive paths to one antenna, anda single remote electrical tilt (RET) for controlling the antenna tilt.

Each MFDUAMCO module may be operated in one of the following modes (by jumper settings):• 2:2 mode: 1 carrier is fed to the antenna port• 4:2 mode: 2 carriers are combined and fed to the antenna port

Within each cell/sector, the same mode of the MFDUAMCO shall be installed.

All RX and RXCA outputs of MFDUAMCO which are not connected to RX input of acarrier unit, shall be terminated with 50 Ω load resistor. The termination is not requiredif an MFDUAMCO module is not used in the cell configurations.

The MFDUAMCO can be combined with a HYBRID4 module and a COAMCO8 moduleto support more carrier units.

The MFDUAMCO is equipped with complete MHA/TMA interfaces for DC supply andsignaling. For more information, see Antenna combining - MFDUAMCO .

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4.4.4 Hybrid extension module for MFDUAMCO (HYBRID4)The HYBRID4 is an optional module in combination with an MFDUAMCO to provide a4:2 configuration or – with an additional COAMCO8 – an 8:2 configuration.

If used, it must be installed in the same ACOM slot as the related MFDUAMCO, becauseit is fastened to the MFDUAMCO by screws at the front panel.

The HYBRID4 unit consists of two identical modules. Each of these modules providestwo RF input ports and one RF output port to combine the TX paths from several carrier units to one connector.

HYBRID4 modules are available for GSM 850/900 MHz or GSM 1800/1900 MHz.

g HYBRID4 and MFDUAMCO units of different manufacturers can be mixed.

For more information, see Antenna Combining - MFDUAMCO-HYBRID4 Configuration .

4.4.5 Multiple duplexer (MDUX)g MDUX and HYBRID6 modules are available for BTSs from BR9.0 onward.

The MDUX serves as a duplexer unit, which provides filtering functions for both, RX andTX paths and low noise amplification for the RX path. The combiner splits the receivesignal to be used in the carrier units.

The MDUX unit provides 6 independent duplexers with filtering functions for both RXand TX paths and low noise amplification for the RX path. The MDUX on the RX sideprovides 4 RX ports per duplexer. These 4 ports can be used to connect the RX pathsof 2 TRX s and the RX diversity paths of 2 other TRXs to one duplexer and hence preparesthe duplexer for the implementation of cells with up to 4 TRXs and diversity.

The 6 duplexers can be freely assigned to different cells as required at the particular BTS site.

Depending on the usage of HYBRID 6 (hybrid extension) modules, the MDUX can beused for 6 antennas with 1 or 2 carriers each, i.e. for up to 12 carriers in total:

• A duplexer without HYBRID6 module combines RX and TX of one TRX onto oneantenna.

• The same duplexer enhanced with one 3dB hybrid unit of the HYBRID6 modulecombines RX and TX of 2 TRXs onto one antenna.

The MDUX has a DC power consumption of about 50 W and supports one frequencyband.

Two MDUX modules of different frequency bands can be installed into the same baseor extension rack for dual-band applications.

Different types of the MDUX module are available for the frequency bands DCS 1800,E-GSM 900, and P-GSM 900.

g The frequency band of the combiner must correspond to the frequency band of theinstalled carrier units.

MDUX/HYBRID6 units can be configured together with other combining hardware, e.g.(F)DUAMCO or DIAMCO, in one base/extension rack.

Restrictions for combiner usage

•If a TMA is needed, a 3rd party low-gain TMA with external BIAS -T and power supply must be used.

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4.4.7 Co-amplifier multicoupler (COAMCO8)The COAMCO8 consists of two identical modules.

The COAMCO8 is used in combination with:

• FDUAMCO in 4:2 mode to provide an 8:2 configuration, so four carriers arecombined and fed to the antenna port.

• MFDUAMCO-HYBRID4 configuration to provide an 8:2 configuration.

• MDUX-HYBRID6 configuration to provide an 8:2 configuration.

COAMCO8 modules are available for GSM 850/900 MHz or GSM 1800/1900 MHz.

For more information, see Antenna combining - COAMCO8 .

4.4.8 Mast head amplifier / tower mounted amplifier (MHA/TMA)MHA and TMA are optional modules that connect the antenna with the BTS in order toamplify the receive signal.

The configuration with MHA or TMA is advantageous because the system sensitivity willnot be degraded by feeder cable loss.

The MHA is feasible only with MFDUAMCO or with the FICOM6 from BR9.0 onward.MHA are not applicable for GSM-R BTS.

One MHA is needed for two RX paths, i.e. for one MFDUAMCO/FICOM6.

One single TMA (STMA) is needed for each RX path of (F)DUAMCO. One dual TMA(DTMA) is needed for two RX paths of (F)DUAMCO.

Different types of MHA exist for different frequency bands:

• MDTA (850 MHz)• MDGA (E-GSM, 900 MHz)• MDDA (1800 MHz)• MDPA (1900 MHz)

The MDxA units replace the TMA units without change of functionality.

See Table 6 for possible substitutions if existing TMAs are replaced by MDxA.

Two kinds of TMA exist: the "single TMA" (GSM 850, GSM 900) and the "dual TMA"(GSM 1800, GSM 1900).

g If the TMA is used together with a HPDU , a BIAS-T ( DUBIAS ) for powering and sig-naling of the TMA is required.

The MFDUAMCO / FICOM6, if set to MHA/TMA mode (dip switch 1 and 6 are ON, or

equivalent O&M configuration setting), automatically detects the connected type of MHA

previous TMA MHA

STMA E-GSM MDGA

STMA 850 MDTA

DTMA DCS MDDA

DTMA PCS MDPA

Table 6 Possible TMA substitutions with MHA

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/TMA (legacy S/DTMA or MDxA) and then initiates the correct operating mode of MDxAafter power-up.

The O&M functionality with respect to TMA/MHA is unchanged with previous and

current BR SW releases (up to BR10).For more information, see Antenna combining - MHA/TMA .

MHA: Fault propagation through dependent modules

The MHA is monitored via AISG protocol. The connected MFDUAMCO/FICOM6 gener-ates an alarm to O&M in case of malfunction. LED s on the front panel of theMFDUAMCO/FICOM6 show the state of each MHA. Each green LED indicates that theDC for the MHA is "OK" and each red LED gives notice of a faulty MHA if the BTS isconfigured for MHA.

If a branch fails, the amplifier will be bypassed by the "Fail save switch". The connectedMFDUAMCO/FICOM6 generates an alarm message towards the O&M. The red LED in

the MFDUAMCO/FICOM6 of the concerned MHA is switched on, and the multicoupler device will be switched into AMCO mode automatically. The operation continues withminor performance degradation.

If an MHA is installed, the MFDUAMCO/FICOM6 works in MUCO mode and only thesecond amplifier of the RX chain is active. If the MHA fails, "Fail save compensation" willtake effect. The MHA connects the antenna directly to the MFDUAMCO/FICOM6,receives a message to switch over into AMCO mode. In AMCO mode, both amplifiersbecome active and the attenuation switches off. The connected carrier units continuetheir operation with minor performance degradation. Only a POWER ON/RESET or asoftware reset can terminate the state of "Fail save compensation".

TMA: Fault propagation through dependent modules

The TMA watches its LNA by monitoring the DC current and generates an alarmmessage towards (F)DUAMCO/DIAMCO. The connected (F)DUAMCO/DIAMCO gen-erates an alarm to O&M in case of malfunction. LED s on the front panel of the(F)DUAMCO/DIAMCO show the state of each TMA. Each green LED indicates that theDC for the TMA is "OK" and each red LED gives notice of a faulty TMA if the BTS is con-figured for TMA.

The LNA consists of two parallel branches. If only one branch has a failure, the amplifier reaches lower gain and the connected (F)DUAMCO/DIAMCO will generate a warningtowards the O&M. Operation continues with performance degradation.

If both branches fail, the amplifier will be bypassed by the "Fail save switch". The con-

nected (F)DUAMCO/DIAMCO generates an alarm message towards the O&M. The redLED in the (F)DUAMCO/DIAMCO of the concerned TMA is switched on, and the multi-coupler device will be switched into AMCO mode automatically. The operation contin-ues with minor performance degradation.

If a TMA is installed, the (F)DUAMCO/DIAMCO works in MUCO mode and only thesecond amplifier of the RX chain is active. If both branches of the TMA fail, "Fail savecompensation" will take effect. The TMA connects the antenna directly to the(F)DUAMCO/DIAMCO, receives a message to switch over into AMCO mode. In AMCOmode, both amplifiers become active and the attenuation switches off. The connectedcarrier units continue their operation with minor performance degradation. Only aPOWER ON/RESET or a software reset can terminate the state of "Fail save compen-

sation".

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4.5 Power supply modules

4.5.1 AC/DC systemAn AC/DC system is required if the BTS is supplied by AC mains. The AC/DC moduleconverts the AC mains voltage (nominal AC input voltage: 230 V) into the -48 V DCsupply voltage.

The AC/DC system consists of one frame housed in the service1A rack.

A frame contains:

• up to 6 AC/DC modules ("n+1" for optional redundancy)

• one controller board DCBCTRL for battery supervision, AC/DC supervision, alarminterface

• frame with AC distribution, DC distribution, signal distribution between AC/DCs and

controller board via backplaneThe AC/DC system has integrated fans to force the cooling airflow through the AC/DCmodules.

The tasks of an AC/DC module are the supply of all -48 V consumers within the BTS andthe generating of alarms in case of AC mains or module failures.

The AC/DC system tasks are in detail:

• output supplying all -48 V-consumers within the BTS; input supplying of 230 V AC single-phase or 3-phase-distribution for the world market and120/208 V AC 3-phase-distribution (208 V phase to phase) for the U.S. market.

• supplying external equipment with -48 V

• charging and supervising of different backup battery types

• supervising AC/DCs, batteries and alarm messaging

• switching off DC outputs (AC/DCs as well as battery) in case of under and over tem-perature

• hot plug-in/out of AC/DC modules

The AC/DC and the backup batteries work as an uninterruptible power supply system(UPS).

AC/DC modules work in load sharing "n+1", but n AC/DC are able to supply the wholeBTS (redundancy concept).A local AC/DC supervision and management system hasbeen implemented which is accessible via RS232 interface and external PC. TheAC/DC-System has external alarm outputs to be connected via wire to the ACTC.

The nominal DC output power of one AC/DC module is 1600 W.

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4.5.2 Backup battery (BATTPACK)The backup battery guarantees continuous operation for a certain time in case of mainbreakdown or AC/DC failure.

The battery backup time depends on the configuration and the battery type. Differentbattery types for each BTS type are available.

Backup batteries are mandatory for AC-supplied systems and must be installed in theservice racks.

All battery systems connected to one AC/DC system should have the same capacity.

The capacity of the backup battery can be increased by additional batteries in separateservice2 racks.

Emergency operation

The backup time of each BTS can be increased by using the "Emergency operation"

feature. To hold the BTS in operation mode for an extended time, it is necessary toswitch over to "Emergency configuration" after a user-defined time. In this mode, noneor only operator defined TRX remain in operation. All TRXs, which are not part of theemergency configuration, are switched off.

The core modules and optional transmission equipment are supplied with DC voltageuntil low voltage detection circuit (LVD relay) disconnects the backup battery fromsystem load.

If enabled, a second timer counts for another user-defined time. With its expiration, allmodules are switched off, except the core modules. This means "Zero configuration".

4.5.3 AC/DC panel (ADP)An ADP is required for the connection of the BTS to the AC supply line, to the internalbattery (if applied) and to the optional batteries of the service2 rack.

The AC/DC power distribution panel is integrated into the service1A rack and consistsof the following main components:

• AC breakers for the AC phases

• AC service socket 230 V with RCD protection (4A nominal current) or 120 V withRCD protection (15 A) for 120/208 V version

• ACTC (except with ADP-2Vx; see note below)

• DC breaker s for base and extension racks, for all service2 racks and all LE in theservice1A rack, for fan units, for the ACTC module, for other panels

• Battery breaker

• High-current clamp terminals for DC supply of other racks and for battery connection

The DC lines (-48 V, 0 V) of the base/extension/service2 rack will be connected to clampterminals at the front-panel of ADP.

One ADP-2 (with F:ACTC-2) or ADPA is required for the service1A rack with a suitablemounting kit for the AC application.

g The ADP-2Vx module needs a special frame F:ACTC-2, e.g. for housing the ACTC.

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4.5.4 DC mains supply unit (MSU:DC)The MSU is located at the EMI panel.

The MSU:DC provides the lightning protection (optional feature), the EMI filter, and theterminal clamps for the external DC cable (-48 V, 0 V).

The lightning protection element indicates fault conditions on an alarm output (LPA)which is linked to the ACTC module.The upgrade kit for lightning protection comprisesthe OVP element, the upgrade cable kit and the LPA connection cable.

One MSU:DC 50 A, 80 A or 100 A has to be installed in each rack (base/extension/service2). Also a MSU:BASV4 (120 A-MSU for Basic Set; optional with lightning protec-tion) can be installed.

g Lightning protection is mandatory if DC cables with a length of more than 10m areapplied.

g A mix of MSU:AC and MSU:DC in one BTS is not permitted.

4.5.5 AC mains supply unit (MSU:AC)The MSU:AC contains the terminal clamps for connecting the external AC supply lines,the EMI filter, and – optional – the lighting protection element.

The lightning protection element indicates fault conditions on an alarm output (LPA)which is linked to the ACTC module.

One 3-phase MSU:AC (type MSU:AC3PH or MSU:BASV2) or one 2-phase MSU:AC inthe U.S. version has to be installed in the service1A rack. In all other racks, the cover part CP:MSU has to be installed.

If lightning protection is required and not included in the MSU module, suitable upgradekits for lightning protection are available.

g A mix of MSU:AC and MSU:DC in one BTS is not permitted.

4.5.6 DC and battery controller (DCBCTRL)The DCBCTRL supervises the AC/DC modules and the DC outputs of the AC/DCsystem. It indicates the status of the power supply system with LEDs.

The DCBCTRL modules of the various power supply systems cannot be interchangedvice versa.

In detail, it performs the following functions:

• Supply of all -48 V consumers with DC power

• Load On / Off

• Battery On / Off

• Charging of battery backup system

• Monitoring of battery current

• Monitoring of load voltage range and battery voltage range

• Monitoring of rack and battery temperature ranges and switching off the DC power in case of over- or under-temperature

• Interface for alarm signals (external/internal)

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• Lightning protection alarm (LPA/ OVP )

For rack alarms, a 24-Pin terminal clamp is used.

On customer request, an ACTM module can be installed in the base rack. In addition tothe 16 internal rack alarms collected with ACTC, 24/48 inputs are available withACTM24Vx/ACTMVx, which can be freely used for external alarms. To protect thesignal lines of the ACTM against overvoltage, an EAP unit (for all lines) or OPEXAL modules (for up to 10 lines each) are available.

The need of EAP or OPEXAL depends on the following situations:

• If all signal lines connected to the ACTM are less than 30 meters long and are keptwithin the building, no additional overvoltage protection is needed.

• If any signal line connected to the ACTM is more than 30 meters long with all signallines still kept within the building, the EAP unit must be used for all external alarmlines.

• If at least one of the external alarm lines is leaving the building, each external alarmline must be protected by its own OPEXAL module.

• Any signal line connected to the ACTM of a outdoor base version must be protectedby its own OPEXAL module.

g The ACTM is mandatory if more than 7 external site alarms are required.


If the ACTC, ACTP or ACTM fails during operation, the BTS continues the operation.

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4.6 Abis interface modules

4.6.1 Overvoltage protection and tracer (OVPT)The OVPT is an optional module. An ABISCON module can be installed as an alterna-tive.

But, the installation of an OVPT module becomes mandatory if the connection point for the Abis line (e.g. Network Termination for PCM30 or Microwave equipment) is outsideof the building which is housing the BTS.

The OVPT is responsible for protection of the PCM24/PCM30 ports of the Abis interfaceand the external synchronization clock input of the BTS against overvoltage. Addition-ally, the OVPT provides interfaces to connect PCM tracers without interruption for mon-itoring the Abis lines and an input interface for external synchronization sources. TheOVPT is located outside the EMI shield to terminate possible overvoltages before they

enter the EMI protected area inside of the rack.The board performs the following tasks:

• lightning protection of PCM lines

• lightning protection of the external synchronization clock

• provision to connect external monitoring equipment without interruption; The linesare decoupled to prevent distortions.

• support of 75 Ω coax or 100 Ω /120 Ω balanced lines

g – Up to 2 PCM lines are supported with COBA2P8 module. – Up to 4 PCM lines are supported with COBA4P12 and COREXT module.

– Up to 8 PCM lines are supported with COBA2P8 plus COSA6P16 installed or COBA4P12 plus COSA4P12.If more than 4 PCM lines are required, a second OVPT needs to be installed.

Figure 11 ABISCON and OVPT (100/120 Ω )

monitoring interfaces

OVPT ABISCON

uplink linesdownlink linesterminals for external PCM cables

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4.6.2 Abis connection (ABISCON)The ABISCON is an optional module. An OVPT module is available as an alternativeto the ABISCON.

The Abis connection module provides the interface between the rack and the peripheralAbis cables. The Abis connection module also provides the feature for monitoring theAbis lines and an input interface for external synchronization sources. The module islocated outside the EMI shielding.

The board performs the following tasks:

• support of 75 Ω coax or 100 Ω /120 Ω balanced lines

• provision to connect external monitoring equipment without interruption; The linesare decoupled in order to prevent distortions.

For an appearance of an ABISCON, see Figure 11 .

g –

Up to 2 PCM lines are supported with COBA2P8 module. – Up to 4 PCM lines are supported with COBA4P12 and COREXT module. – Up to 8 PCM lines are supported with COBA2P8 plus COSA6P16 installed or

COBA4P12 plus COSA4P12.If more than 4 PCM lines are required, a second ABISCON needs to be installed.

4.6.3 Ethernet connector module (ETHCON)The ETHCON unit is mandatory in combination with one or two CESCOBA(s), which isnecessary for Circuit Emulation Service over Packet Switched Network (CESoPSN)functionality. This feature allows carrying TDM traffic over a packet network withoutexternal equipment. TDM to packet interworking functionality is based on the PseudoWire emulation Edge-to-Edge mechanism (PWE3), which allows the transport of allrelevant parts of a service, such as E1/T1 lines over a packed switched network. For more information about CESoPSN functionality, see the feature description “FD10560:Internal Ethernet/IP interfaces for BSS”.

The ETHCON replaces the ABISCON or OVPT board (Abis interface 0...3).

CESCOBA and ETHCON are available from BR10 onward.

It performs the following tasks:

• Provision of two 100Base-TX electrical Ethernet interfaces, e.g. to BSC or to another BTS, one internal 100Base-Tx interface to the active CESCOBA, and two 100Base-TX electrical Ethernet trace ports

• Provision of two SFP slots for support of optical Ethernet ports (100Base-FX,1000Base-LX, or 1000Base-SX)

• Over voltage protection of the external clock synchronization inputs

• Provision of remote inventory data

The ETHCON must be installed in PCM0 slot only (top of base rack, or plinth of baseshelter). The mounting kit MK:ETHCONSHV1 is required for installation of ETHCONunit into plinth of BTSplus shelter, the MK: EAPB-BOXRV1 is required for installation of ETHCON unit together with HPDU unit on top of BS-240 II base rack or BS-240XL IIbase rack (relevant for XL rack variant with MUCO slots only).

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BS-240XL II product description Antenna combining

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5 Antenna combiningIn order to serve cells with different carrier numbers and antenna configurations, certaincombinations of combining modules are required. These configurations provide the nec-essary performance in an effective way.

g The term "(MF/F)DUAMCO" means the modules DUAMCO, FDUAMCO andMFDUAMCO.

Antenna combining is used to connect the carrier units (CU) to the antenna system.

Duplex combining connects the receiver (RX) and the transmitter (TX) of a carrier unitto a common antenna. This is done by a duplex filter and serves as the basic functionof a combining unit. Additionally this filter provides the selectivity to fulfill the require-ments according to the requests of the GSM standard. The receiver part of the duplexfilter is terminated by a low noise amplifier, which further on serves several analogousoutputs.

If several transmitters should use the same antenna, they have to be combined beforefeeding them to the TX section of the duplex filter. Two types of transmitter combiningare available: Hybrid combining (wideband) and filter combining (narrow band).

TX hybrid combining is available for 2 or 4 carriers. TX filter combining is good for up to8 carriers with the full extended FICOM and up to 6 carriers with the new FICOM6.

• FICOM: Only TX combining, no receiver path integrated. An additional DIAMCOmodule and also HPDU might be needed.

• FICOM6: One basic combining module with filter combining for up to 6 TX. Addition-ally, a complete receiver path for diversity reception is integrated.

All DUAMCO, FDUAMCO and MFDUAMCO modules contain two independent sectionswith equal functionality, that is two separate antennas are handled by those combiner devices.

• DUAMCO 2:2 : Two basic combining modules, no hybrid TX combining

• DUAMCO 4:2 : Two basic combining modules, each with hybrid combining for 2 TX

• DUAMCO 8:2: Two basic combining modules, each with hybrid combining for 4 TX

• FDUAMCO: Two basic combining modules, each with switchable hybrid combiningfor up to 2 TX. An expansion to 4 TX for each module may be done by the COAMCOmodule.

• MFDUAMCO: Two basic combining modules. For hybrid TX combining the add-on

module HYBRID4 is requested.

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5.1 MFDUAMCOThe MFDUAMCO (multi-standard FDUAMCO) is the successor of DUAMCO andFDUAMCO and offers a flexible way to combine by using the additional HYBRID4 and

COAMCO8 modules.Maximum number of TRXs to be connected:

• 2 TRX s with MFDUAMCO

• 4 TRXs with MFDUAMCO in combination with a HYBRID 4

• 8 TRXs with MFDUAMCO in combination with a HYBRID4 and a COAMCO 8

g The frequency band of the MFDUAMCO must correspond to the frequency band of the concerning cell to be served.

Design and function

The MFDUAMCO consists of two (identical) modules, a remote electrical tilt (RET,hardware prepared) and a common part. Each module contains a duplex filter to be fedto a common antenna. The duplex filter combines the RX and the TX paths together.The gain of the receive path is switchable to an amplifier multicoupler (AMCO) or a mul-ticoupler (MUCO) configuration (see below Operating modes for MFDUAMCO ).

Each RX path consists of:• the low noise amplifier (LNA), two branches• an attenuator (MUCO mode only)• four equivalent outputs• a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the MFDUAMCO decreases by about6 dB.

The LNA provides 4 outputs of the amplified received signal. These output ports are con-nected to the corresponding carrier units by jumper cables.

Each TX path consists of:• an isolator for the TX input• an antenna supervision unit (ASU)• jumpers for combining mode setting

The isolator for the TX input protects the power amplifiers (PAs) inside the carrier unitsfrom each other in order to assure the required inter-modulation suppression.

The MFDUAMCO detects a VSWR alarm and generates a failure information towardsthe O&M (CAN bus interface). This information is subdivided in several levels with thefollowing characteristics:

Module 0 of MFDUAMCO is prepared for a RET interface (to be provided via triplexer atantenna output ANT0).Module 0 supports single feeder configuration (SFC) where the power supply and thesignaling for the single feeder DTMA (SDTMA) are provided also via triplexer at antennaoutput ANT0.

– VSWR < 2 – 2 ≤ VSWR ≤ 3 – VSWR > 3

no alarm or warninggeneration of warning "Minor VSWR fault"generation of VSWR alarm "Major VSWR fault"

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The following figure shows the block diagram of a MFDUAMCO:

Figure 13 MFDUAMCO block diagram

MFDUAMCO

Tri-plexer

VSWRPROC

ANT0

Testout 1

RXout 1

RXin 1

Tri-plexer

VSWRPROC

ANT0

Testout 0

RXout 0

RXin 0

RXCA 1RX0 RX2RX1 RX3

RXCA 0 RX3RX1RX2RX0

DC/DCConvert.

PID

CANControl.

TMASignall.

TMADC/DCConvert.

MHASignall.

MHADC/DCConvert.

Module0 Module11 ACOM Slot

CAN Bus

RX TXFilter Fil ter

TX RXFilter Fil ter

LNA LNA

LNALNA

TXin0(=3)

TXin1(=3)

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Configurations

Depending on the use of additional hardware, the MFDUAMCO can be used in a:• 2:2 configuration

for combining up to 4 RX and 1 TX paths to each of the 2 antenna connectors.• 4:2 configuration in combination with a HYBRID4 module• 8:2 configuration in combination with a HYBRID4 and a COAMCO8 module

These configurations differ in the number of carriers to be combined to two antennas.

MFDUAMCO-HYBRID4 configuration

The combination of MDFUMACO and HYBRID4 provides a 4:2 configuration which isused for combining 4 RX and 2 TX paths to each of the 2 antenna connectors.

Each of the two modules of a HYBRID4 provides two RF input ports and one RF outputport to combine the TX paths from several carrier units to one connector.

Figure 14 HYBRID4 block diagram

MFDUAMCO-HYBRID4-COAMCO8 configuration

In combination with a COAMCO8, eight TRXs can be connected (see COAMCO8 ).

For an 8:2 configuration , a COAMCO8 unit is used in conjunction withMFDUAMCO/HYBRID4 in 4:2 configuration. The modules provide two antenna portsand eight TX inputs.

The COAMCO8 combines two additional carriers per module with the two carriers fromthe output TXout(4) of the HYBRID4, feeds the four carriers back to the input TXin(3) of the MFDUAMCO and provides four additional RX outputs per module from the cascad-ing output of the MFDUAMCO.

TX0 TX1 TXOUT0

3 dB Hybrid

TX2 TX3 TXOUT 1

3 dB Hybrid

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5.2 FDUAMCO / DUAMCOThe (F)DUAMCO (flexible duplexer amplifier multicoupler) modules contain duplexfilters in order to combine the transmit and receive paths to one antenna connector. The

receive and transmit part of the duplex filter, respectively, provide the substantial part of the receive and transmit band filtering required by GSM 05.05, 11.21 andJTC J-STD-007.

The type of (F)DUAMCO required depends on the carriers to be combined to theantenna system. Its modules can be assigned to the same cell or to different cells.

g The frequency band of the (F)DUAMCO must correspond to the frequency band of the concerning cell to be served.

Design and function

The (F)DUAMCO consists of two (identical) modules and a common part. Each modulecontains a duplex filter which combines the RX and the TX path together, to be fed to acommon antenna.

Each RX path consists of:• the low noise amplifier (LNA), 2 branches• an attenuator (MUCO mode only)• multiple (4/8) equivalent outputs• a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the (F)DUAMCO decreases by about6 dB.

The LNA provides 4/8 outputs of the amplified received signal. These output ports areconnected to the corresponding carrier units by jumper cables.

Each TX path consists of:• an isolator for the TX input• an antenna supervision unit (ASU)• for DUAMCO 4:2 and DUAMCO 8:2: hybrid coupler • for FDUAMCOs: jumpers for combining mode setting


The (F)DUAMCO detects a VSWR alarm and generates a failure information towardsthe O&M (CAN bus interface). This information is subdivided in several levels with thefollowing characteristics:

Except in 2:2 mode, a hybrid coupler feeds two TX inputs together to the TX path.

The common part consists of:• a DC/DC converter plus a power distribution unit (PDU)• an O&M unit

The DC/DC converter supplies the (F)DUAMCO itself. The PDU provides the DC power

supply and the alarm monitoring of the TMAs. Alarm monitoring is done with a signalinginterface between (F)DUAMCO and TMA.

– VSWR < 2 – 2 ≤ VSWR ≤ 3 – VSWR > 3

no alarm or warninggeneration of warning "Minor VSWR fault"generation of VSWR alarm "Major VSWR fault"

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Figure 16 DUAMCO 4:2 block diagram

Figure 17 DUAMCO 8:2 block diagram

ANT0

Module 0M odule1

RXCA RX

CAN Bu s0

LNA

LNA

TXRX RX RX00 1 2 3

MUCO

AMCO

Mode

Mode

-48 V

BiasTEE

1 ACOM Slot

RX TX

ASU

RXCA RX1

RX RX RX0 1 2 3

BiasTEE

RX TX

ASU

ANT1

Coupler

TX1

TX0

Coupler

TX1

LNA

LNA

MUCO

AMCO

Mode

Mode

TMADC + Signall.

DCCTRL

O&M

ANT0

Module 0 Module 1

RXCA

CAN Bus0

LNA

LNA

TX0

MUCO

AMCO

Mode

Mode

BiasTEE

RX TX

ASU

RXCA1

BiasTEE

RX TX

ASU

ANT1

Coupler

LNA

LNA

MUCO

AMCO

Mode

Mode

TX1

TX2

TX3

Coupler

TX1

TX0

TX2

TX3

TMADC + Signall.

DCCTRL

O&M

RX RX

2 ACOM Slots

-48 V0 7 0RXRX

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5.2.2 FDUAMCO specialsThe FDUAMCO is the successor of the DUAMCO.

A maximum of four TRX s can be connected to one FDUAMCO. In combination with aCOAMCO8, eight TRXs can be connected (see COAMCO8 ).

Each half of the FDUAMCO can be configured in "One-To-One" mode (like DUAMCO2:2) and "Two-To-One" mode (like DUAMCO 4:2) by means of jumper cables, whichinsert the 3 dB hybrid or not. "One-To-One" means that the hybrid is not used, "Two-To-One" means that the hybrid is used.

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Figure 19 MDUX block diagram

The installation of an MDUX needs two horizontal adjacent ACOM slots.

The TX input port can either be used to connect one TRX directly or alternatively toreceive the signal from a 3dB hybrid (using one out of six 3dB hybrids of the moduleHYBRID6, see below). The 3dB hybrid itself combines the TX signals of 2 TRXs oper-ating in the same frequency band.

The 4 RX ports can be used to connect the RX paths of 2 TRXs and the RX-diversity

paths of 2 other TRXs to one duplexer. So the MDUX on the receive side is ready for doing a 1:1 or 2:1 combining per duplexer – the duplexers are prepared to implementRX diversity together with a second duplexer.

The 6 duplexers can be freely assigned to different cells as required at the particular BTS site. This means that a cell is built using at least one duplexer in case diversity isnot required or at least 2 duplexers in case diversity is required.

The number of duplexers used per cell depends on:• Diversity required or not• Number of TRXs in the cell• Usage of hybrid modules

If a TMA is needed, a low-gain TMA with external BIAS -T and power supply must beused.

A discrete alarm line instead of the CAN -bus is used to indicate a failure of the MDUX-internal DC/DC converter. The alarm line is connected to the ACTC module. The MDUXdoes not provide VSWR supervision and LNA alarms.

RX TXFilter Filter

RX0...RX3

DC/DCConvert.

LNA

RX TXFilter Filter

LNA

RX TXFilter Filter

LNA

ANT0

Module 0

ANT1

Module 1

ANT2

Module 2

ANT3

Module 3

ANT4

Module 4

ANT5

Module 5

TX0 RX0...RX3RX0...RX3

RX TXFilter Filter

RX0...RX3

LNA

RX TXFilter Filter

LNA

RX TXFilter Filter

LNA

RX0...RX3RX0...RX3TX1 TX2 TX3 TX4 TX5RXCA RXCA RXCA RXCA RXCARXCA

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MDUX loss (TX path)

The typical combiner TX loss (TX attenuation) is defined for mid band at room temper-ature. The guaranteed combiner TX loss is defined for the full frequency range, taking

into account the full temperature range.

MDUX gain (RX path)

The combiner RX gain is frequency band-dependent.

GSM 850 GSM 900 GSM 1800 GSM 1900

MDUX type Typic. Guar. Typic. Guar. Typic. Guar. Typic. Guar.

2:2 configuration t.b.d. 1)

1) to be done in one of the next issues of this document

1.9 dB t.b.d. 1.7 dB t.b.d. 1.7 dB t.b.d. 1.7 dB

4:2 configura-tion 2)

2) 4:2 mode is constructed with MDUX + HYBRID6

t.b.d. 5.8 dB t.b.d. 5.6 dB t.b.d. 5.7 dB t.b.d. 5.7 dB

8:2 configura-tion 3)

3) 8:2 mode is constructed with MDUX + HYBRID6 + COAMCO8

t.b.d. 9.5 dB t.b.d. 9.3 dB t.b.d. 9.6 dB t.b.d. 9.7 dB

Table 14 MDUX: Insertion loss

GSM 900 GSM 1800, 1900

RX RX CA RX RX CA

MDUX 20 dB 18.5 dB 22 dB 19.5 dB

+1.3/-1.7

Table 15 MDUX: Gain

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5.4 COAMCO8The COAMCO8 (co-amplifier multicoupler) can be used in combination with anFDUAMCO or an MFDUAMCO or an MDUX.

The combinations with COAMCO8 provide an 8:2 configuration by including 4 additionalcarriers ( TRX s):

• with FDUAMCO in 4:2 mode (see Figure 23 )

• with MFDUAMCO and HYBRID4 (see Figure 24 )

• with MDUX and HYBRID6

A COAMCO8 unit consists of two identical modules, containing a transmit and a receivepath each. Each module of the COAMCO8 combines two additional carriers with the twoTX inputs of the MFDUAMCO or FDUAMCO.

In sum, the COAMCO8 combines eight carrier units: either in combination with

FDUAMCO (jumpered in 4:2 mode) or in combination with MFDUAMCO/HYBRID4.

Figure 22 COAMCO8 block diagram

The RX cascading outputs of the MFDUAMCO/FDUAMCO provide the RX input signalsfor the additional 4 RX outputs of the COAMCO8.

RXCA 1RX0 RX2RX1 RX3

RXCA 0 RX3RX1RX2RX0

DC/DCConvert.

TX0 TX1 4 3

3 dB Hybrids AMP AMP

TX2 TX3 4 3

3 dB Hybrids

RXCA 0 in RXCA 1 in

Module0 Module1

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Combination with FDUAMCO

Figure 23 FDUAMCO in 4:2 mode with COAMCO8 (= 8:2 mode)

RX TX

X

RX TX

X

COAMCO8FDUAMCO in 4:2 mode

RX0 RX3.. .

TX4TX5

RX0 RX3... RX4 RX7.. . RX4 RX7...

+

RX cascading output

TX cascading output

TX input FDUAMCO = TX output COAMCO8

TX6TX7

TX2TX3

TX0TX1

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5.5 Antenna line equipment MHA/TMAThe MHA (mast head amplifier) and TMA (tower mounted amplifier) are optional modules that connect the antenna with the BTS in order to amplify the receive signal and

pass through the transmit signal.The configuration with MHA or TMA is advantageous because of the compensation of the antenna feeder cable losses.

The TMA contains two duplex filters, each on one RF connector, to separate andcombine the receive and transmit path inside the TMA.

In cell configuration with an MHA or TMA, the true system RX sensitivity is guaranteedat the antenna, independent of the antenna feeder cable attenuation.

One MHA is needed for two RX paths of MFDUAMCO/FICOM6.

One single TMA (STMA) is needed for each RX path of (F)DUAMCO. One dual TMA(DTMA) is needed for two RX paths of (F)DUAMCO.

When MHA/TMA is used, the MFDUAMCO/FICOM6 or (F)DUAMCO, respecitvely,works in the MUCO (multicoupler) mode, see Operating modes for FICOM6 , Operatingmodes for MFDUAMCO or Operating modes for (F)DUAMCO .

The DC power for the MHA/TMA is supplied by the MHA/TMA DC power supply withinthe (M)(F)DUAMCO.

The encoder/decoder of the MHA/TMA signaling unit generates a separate alarm for each MH/A/TMA by monitoring the DC current consumption of each unit.

Different types of MHA for different frequency bands exist:• MDTA (850 MHz)• MDGA (E-GSM, 900 MHz)• MDDA (1800 MHz)• MDPA (1900 MHz)

Two kinds of TMA exist: the "single TMA" and the "dual TMA".

The single TMA (types TMA and STMA) consists of:• 2 duplex filters to split RX and TX paths• the low noise amplifier (LNA) to amplify RX signals• "Fail Safe Functionality" to ensure operation in case of faulty LNA

A dual TMA (type DTMA) consists of two identical, independent single TMA modules.Two (S)TMAs may be replaced by one DTMA unit of the same frequency band.

The following figures show the block diagrams of the TMA single and dual and MHA:

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Figure 25 TMA (single) block diagram

Figure 26 MHA / TMA (dual) block diagram (RET only at MHA)

ANT

IN

COM

OUT

Tri-plexer

RXFilter 2

RX TXFilter 1 Filter

FailSafeSwitch

TMA TMA

ANT

IN

COM

OUT

Tri-plexer

RXFilter 2


ANT

IN

COM

OUT

Tri-plexer

RXFilter 2


RET

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MHA parameters

Parameter MDTA

(850 MHz)

MDGA

(900 MHz)

MDDA

(1800 MHz)

MDPA

(1900 MHz)-40°C - +55°C

(-40°F - +131°F)

TX insertion loss 0.8 dB max 0.8 dB max

Gain (Ant-Com) 32 dB ± 1.0 dB 12/33 dB ± 1.0 dB

Noise figure (Ant-Com) 2.2 dB max

Attenuation failsafe ≤ 4.0 dB

Return loss (RX) 16.0 dB min 18.0 dB min

Return loss (TX) 18.0 dB min

Input P1dB ≥ 32 - 7 dBm min ≥ 32 - 10 dBm min

IIP3 32 + 5.2 dBm ≥ 32 + 3 dBm min

Operational currentrange

300 - 750 mA300 - 750 mA (high gain)100 - 190 mA (low gain)

Operational voltagerange

10 - 30 V 10 - 30 V

Power RET port 17 W max 15 W max

Operational power range

10 W max10 W max (high gain)

4 W max (low gain)

Intermodulation ANTport

-116 dB (Rx band 3 rd order;2 x Tx carrier at 43 dBm)

-115 dB (Rx band 3 rd order;2 x Tx carrier at 43 dBm)

Table 16 MHA: electrical parameters

Parameter MDTA(850 MHz)

MDGA(900 MHz)

MDDA(1800 MHz)

MDPA(1900 MHz)

-40°C - +55°C(-40°F - +131°F)

Size (W x H x D) 250 mm x 350 mm x 100 mm 210 mm x 295 mm x 65 mm

Weight approx. 9 kg approx. 5 kg

Antenna connector 7/16

BTS connector 7/16

Table 17 MHA: mechanical parameters

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TMA parameters

Parameter Single TMA:

GSM 850, GSM 900

Double TMA:

GSM 1800, GSM 1900-25°C - +45°C

(-13°F - +113°F)-40°C - +65°C

(-49°F - +149°F)-25°C - +45°C

(-13°F - +113°F)-40°C - +65°C

(-49°F - +149°F)

Insertion loss 0.8 dB (0.5 dB typical)

Gain (Ant-Com) 24 dB ± 2.0 dB 24 dB ± 2.5 dB 24 dB ± 2.0 dB 24 dB ± 2.5 dB

Noise figure (Ant-Com) ≤ 2.2 dB ≤ 3.0 dB ≤ 2.2 dB ≤ 3.0 dB

Attenuation failsafe ≤ 4.0 dB ≤ 4.2 dB ≤ 4.0 dB ≤ 4.2 dB

P1dB (Com) ≥ 18 dBm ≥ 12 dBm

IP3 (Com) ≥28 dBm

Current consumption ≤ 500 mA ( ≤ 6 W) ≤ 1 A ( ≤ 12 W)

Nominal voltage 12 V ± 8%

Table 18 TMA: electrical parameters (guaranteed)

Parameter Single TMA:GSM 850, GSM 900

Double TMA:GSM 1800, GSM 1900

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

-25°C - +45°C(-13°F - +113°F)

-40°C - +65°C(-49°F - +149°F)

Size (W x H x D) 175 mm x 282 mm x 95 mm(6.9” x 11” x 3.7”)

345 mm x 235 mm x 85 mm(13.6” x 9.3” x 3.4”)

Weight approx. 6 kg(approx. 13.2 lbs)

approx. 10 kg(approx. 22.0 lbs)

Antenna connector 7/16

BTS connector 7/16

Table 19 TMA: mechanical parameters (guaranteed)

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5.6 FICOM6The FICOM6 (filter combiner with 6 tunable narrowband filters) is the successor of theFICOM modules (old FICOM modules were not available in BS-240XL II) and provides

the same functionality like an MFDUAMCO module.The installation of a FICOM6 needs two horizontal adjacent ACOM slots.

RF power combining / tuning modes

The low loss power addition is carried out by combining the outputs of remote tunablenarrowband filters (TNFs) inside the FICOM6. These TNFs are remotely tuned to thechannel frequency of the corresponding carrier. It is possible to combine a minimum of 2 and a maximum of 6 TX signals in each FICOM6.

A TNF is first coarse tuned to the desired channel. If RF power is supplied to the TNF itautomatically performs a fine tuning to ensure the best RF performance. With this auto-matic tuning process, the drift of the passband filter center frequency is compensated.

Therefore, the FICOM6 can only be used with baseband frequency hopping, as retuningof the TNF frequency requires up to 5 seconds.

For a large number of carriers (6 and higher), baseband frequency hopping has only anegligible disadvantage compared to synthesizer frequency hopping.

Design and function

The FICOM6 consists of two modules and a common part.One of the modules (module 1) contains an RX path. The other module (module 0)contains a duplex filter to be fed to a common antenna. The duplex filter combines theRX and the TX paths together. The gain of the receive path is switchable to an amplifier multicoupler (AMCO) or a multicoupler (MUCO) configuration (see below Operatingmodes for FICOM6 ).

Each RX path consists of:• the low noise amplifier (LNA), two branches• an attenuator (for MUCO and AMCO mode)• six equivalent outputs• a cascade output

The LNA ensures a low system noise figure and consists of two branches. In case of malfunction in one of the amplifiers, the RX gain of the FICOM6 decreases by about6 dB.

The LNA provides six outputs of the amplified received signal. These output ports areconnected to the corresponding carrier units by jumper cables.

The RX signal from main antenna port ANT0 (see Figure 27 ) is passed through to theduplexer, where the RX bandpass filter section selects the uplink band signal. Normally,this signal is routed to the LNA over a jumper line connected at the front plate of themodule (RXin, RXout). This bridge is only omitted when the BTS needs a simplex RXinput, because the RX signal is not provided directly by the antenna but by an RX signaldistribution unit, e.g. another co-sited BTS or some 3rd party RX multicoupler.

LNA1 is optimized for low noise figure and can be by-passed with a switch in case a highgain TMA is providing sufficient signal amplification (MUCO mode). A failure of LNA1generates a major alarm in the O&M system. The attenuator can be adjusted over arange of 12 dB (in steps of 1 dB) to set the total gain of the RX path from antenna portto TRX input port to the nominal value. The attenuator works in both modes (AMCO and

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MUCO) to allow correct gain setting for a great variety of antenna system configurations:with or without TMA, high or low gain TMA and a range of feed line loss.The activation of the by-pass switch and the adjustment of the attenuator can be donevia DIP switches or O&M commands.

LNA2 is optimized for high output power and linearity to direct up to 6 RX outputs to theTRX units through the power splitter and a further cascading output (RXCA). LNA2 is atwo-branch amplifier for enhanced reliability. A failure of one branch of LNA2 generatesa minor alarm, and a failure of both branches of LNA2 generates a major alarm in theO&M system.

The RX path from antenna port ANT1 (RX diversity) is equal to the main RX path withthe following exceptions: The antenna port ANT1 is directly connected with the RXbandpass filter, without any duplexer. The RXin/RXout connectors are not neededbecause the antenna port ANT1 is a simplex port only. The RX output ports direct thediversity RX inputs to up to 6 TRXs.

The TX path consists of:• six tunable narrowband filters (TNFs)• an isolator for the TX input• an antenna supervision unit (ASU)• jumpers for combining mode setting


The TX signals from up to 6 TRXs, each operating on a different carrier frequency, arepassed through TNFs. The filter passband is just wide enough for a single GSM radiofrequency channel and its center frequency is tuned by an electric motor under controlof the module's micro controller. The TNF outputs are summed and routed to theduplexer. The duplexer passes the composite TX signal through its TX bandpass filter section towards the antenna port. The DUBIAS allows coupling DC supply current andcontrolling signal on the RF line, which are needed to control active antenna-near devices like MHA, DTMA and RET . Finally, the VSWR sensor measures the VSWR onthe feed line and outputs the composite TX signal to the main antenna port ANT0.

The FICOM6 detects a VSWR alarm and generates a failure information towards theO&M (CAN bus interface). This information is subdivided in several levels with the fol-lowing characteristics:

The common part consists of:• a DC/DC converter plus a power distribution unit (PDU)• an O&M unit

The DC/DC converter supplies the FICOM6 itself. The PDU provides the DC power supply and the alarm monitoring of the TMAs. Alarm monitoring is done with a signalinginterface between FICOM6 and TMA.

The O&M unit transmits error messages to the COBA via a CAN bus.

– VSWR < 2 – 2 ≤ VSWR ≤ 3 – VSWR > 3

no alarm or warninggeneration of warning "Minor VSWR fault"

generation of VSWR alarm "Major VSWR fault"

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Antenna combining

Operating modes for FICOM6

The FICOM6 has two operating modes. During the BTS commissioning, the RX pathmust be switched into one of these modes (by DIP switches):

• AMCO mode• MUCO mode

The high amplifying AMCO mode is used if the antenna is directly connected to theFICOM6 (without a preamplifier TMA). The FICOM6 gain is around 20/22 dB (see Table21 , also for RX CA gain).

The low amplifying MUCO mode is used in case of cascading the FICOM6 with a pre-amplifier MHA or TMA. A built-in attenuator provides a constant gain betweenMHA/TMA and FICOM6, independent of the cable loss. The power supply and the sig-naling of the MHA/TMA are provided by the FICOM6 via triplexer at the antenna outputs.The gain is reduced to about 2 dB (see Table 21 , also for RX CA gain). The gain of theFICOM6 can be matched to the cable loss and the TMA gain with the DIP switch. Thisadjustment is only done once during the installation of the BTS by the service personnel.

The gain adjustment is performed at commissioning by setting the attenuator in FICOM6by dip switches, or, from BR10 onward, by using the appropriate configuration commandin the O&M system. See the Commissioning manuals for details.

The selected mode can be read by O&M software via CAN bus interface.

The following features of O&M support are available from BR10 onward:

• RX gain adjustment is configurable via LMT and remote via RC , even missing or wrong DIP switch settings can be corrected from remote. In this case, the LED(TMA) is permanently green flashing.

• VSWR thresholds for warning and alarming is configurable via O&M command.

• 3rd party TMAs (low gain, no fault signaling) are supported by O&M software. TheRX amplifier mode and the TMA power supply can be enabled/disabled indepen-dently, allowing AMCO mode and TMA power supply in parallel.

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Antenna combining

FICOM6 losses (TX path) and gains (RX path)

The typical combiner TX attenuation was measured for mid band at room temperature.The guaranteed combiner TX attenuation was measured for the full frequency range,

taking into account the full temperature range. The measures were taken with 6 carrierswith a minimum carrier separation (spacing) of 600 kHz.

g With lower spacing, e.g. 400 kHz, the RX behavior of FICOM6 is worse (appr.1.5 dB more insertion loss = 4.5 dB).

GSM 900 GSM 1800

FICOM6 Typical Guaranteed Typical Guaranteed

80% Bandwidth t.b.d. 1)

1) to be done in one of the next issues of this document

3.0 dB 2)

2) preliminary value, without guarantee

t.b.d. 3.0 dB 2)

100% Bandwidth t.b.d. 3.5 dB 2) t.b.d. 3.5 dB 2)

Table 20 FICOM6: Insertion loss

GSM 900 GSM 1800

RX RX CA RX RX CA

Gain AMCO 20 dB 18.5 dB 22 dB 19.5 dB

+1.3/-1.7 dB with 100% BW

± 1.3 dB with 80% BWGain MUCO 2 dB 0.5 dB 3 dB 0.5 dB

+0.8/-1.2 dB with 100% BW

± 0.8 dB with 80% BW

Attenuator range 0-12 dB

Attenuator step size 1 dB

Table 21 FICOM6: Gain (guaranteed)

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5.7 Diplexer The diplexer gives the possibility to use one antenna feeder cable for both GSM 850 withGSM 1900 and GSM 900 with GSM 1800 frequencies. One diplexer is needed to

combine the two different frequencies at the BTS side and the other one to separate thefrequencies near the antennas.

The diplexer offers the possibility to reduce the number of antenna feeder cables in allcases where GSM 900 and GSM 1800, GSM 1900 or GSM 850 and GSM 1900 feeder cables have to be installed in parallel. For example: An existing GSM 900 network willbe extended by a GSM 1800 or GSM 1900 network to implement a dual band network.

g The diplexer is a commodity product, which is available from many filter manufac-turers.

Figure 28 Configuration with diplexer (example)

Antenna Dual Band

900 MHz1800 MHz

Diplexer

DUAMCO 2:2

(1800 MHz)

DUAMCO 2:2

(900 MHz)

Diplexer

f 1 f 2

f 1 + f 2

f 1 f 2

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BS-240XL II product description Cell configurations

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Figure 30 Single-Cell (12,0,0): with 2 DUAMCO 8:2

Figure 31 Single-Cell (12,0,0): with 3 DUAMCO 4:2

RX TX

DUAMCO 8:2

CELL 0

Coupler

RX TX

Coupler

4 5TRX0 1 2 3

RX TX

DUAMCO 8:2

Coupler

RX TX

Coupler

10 11TRX6 7 8 9

RX TX

DUAMCO 4:2

CELL 0

Coupler

RX TX

Coupler

TRX0 1 2 3

RX TX

DUAMCO 4:2

Coupler

RX TX

Coupler

TRX4 5 6 7

RX TX

DUAMCO 4:2

Coupler

RX TX

Coupler

TRX8 9 10 11

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Cell configurations

Figure 32 Multi-Cell (8,8,8): with 4 DUAMCO 8:2 (base and extension rack)

Figure 33 Multi-Cell (12,12,0): with 4 DUAMCO 8:2 (base and extension rack)

8 TRX4 TRX4 TRX8 TRX

8 TRX4 TRX4 TRX8 TRX

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Figure 34 FDUAMCO configuration 2:2 or 4:2

Figure 35 Configuration 8:2 with FDUAMCO and COAMCO8

Module 0 Module 1

RX

TX

RX TXRX TX RX TXRX TX

RXdiv RX

TX

RXdiv

Module 0 Module 1

RX TXRX TX RX TXRX TX

FDUAMCO 2:2 FDUAMCO 4:2

TRX1TRX0 TRX0 TRX2TRX1 TRX3

Module 0 Module 1

RX TX RX TX

FDUAMCO + COAMCO8

RX

TX0/1

RXdiv

TX2/3

RXdiv TX4/5

TX6/7

RXdiv4..7 4..7 0..30..3

RX TXRX TXModule 0 Module 1

8:2

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FCC issues (for U.S. market only)

7 FCC issues (for U.S. market only)In this chapter, you find the power reduction for corner frequencies of carrier units avail-able in the USA. These values are only relevant for the U.S. market.

Revised FCC certification for ECU / FlexCU 850

For ECUs/FlexCUs with 869.2 and 893.8 MHz frequencies, in order to fulfill the FCC requirements in the USA, the maximum transmitting power of the corner frequencies of the GSM 850 band (channel numbers 128 and 251, and 869.2 MHz and 893.8 MHzrespectively) is decreased for all carrier units available for the U.S. market.

This function is required by law and is therefore implemented as a fixed software com-ponent, which cannot be changed or removed locally.

The BTS evaluates the mobile country code (MCC) provided by the BSC via the attribute"cellGlobalIdentity". If the MCC indicates "USA", the BTS reduces the output power of the corner frequencies dependent on the hardware type of the carrier unit. The followingtable represents the power reduction values for GMSK and 8PSK modulation.

Carrier unit type GMSK 8PSK

128 251 128 251

ECU V2 -8 dB -4 dB -4 dB -2 dB

ECU HPV2 -6 dB -4 dB -4 dB -2 dB

ECU V3(A) -6 dB -4 dB -4 dB -2 dB

FCU V1 -8 dB -8 dB -4 dB -4 dB

Table 22 Power reduction of the carrier units (ECU/FlexCU 850) at antenna port

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Revised FCC certification for ECU / FlexCU 1900

For ECUs/FlexCUs with 1930.2 and 1989.8 MHz frequencies, in order to fulfill the FCCrequirements in the USA, the maximum transmitting power of the corner frequencies of

the GSM 1900 band (channel numbers 512 and 810, and 1930.2 MHz and 1989.8 MHzrespectively) is decreased for all carrier units available for the U.S. market.

This function is required by law and is therefore implemented as a fixed software com-ponent, which cannot be changed or removed locally.

The BTS evaluates the mobile country code (MCC) provided by the BSC via the attribute"cellGlobalIdentity". If the MCC indicates "USA", the BTS reduces the output power of the corner frequencies dependent on the hardware type of the carrier unit. The followingtable represents the power reduction values for GMSK and 8PSK modulation.

Carrier unit type GMSK 8PSK

512 810 512 810

ECU V2 -4 dB -2 dB -2 dB -0 dB

ECU HPV2 -8 dB -6 dB -4 dB -2 dB

ECU V3(A) -8 dB -6 dB -4 dB -2 dB

FCU V1 -8 dB -8 dB -4 dB -4 dB

Table 23 Power reduction of the carrier units (ECU/FlexCU 1900) at antenna port

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Index

AAbis connection 46Abis interface 26Abis interface configurations 11Abis link equipment 48ABISCON 46AC/DC panel (ADP) 41AC/DC system 40ACLK 29ACTC 43ACTM 44ACTP 43alarm collection terminal boards 43AMCO mode 51, 56, 76

and MHA 38and TMA 38

antenna combining 49antenna line equipment

MHA 37TMA 37

Bbackup battery 41battery backup 41

Ccarrier unit interface 26carrier units 30

CU 30ECU 30FlexCU 31GCU 30output power level 32

CC-link 26cell configuration 10cell configuration (examples) 80COAMCO8 37

functionality 67COBA 26combiner gains

(F)DUAMCO 56MFDUAMCO 54

combiner losses(F)DUAMCO 56MFDUAMCO 54

combining moduleMDUX 35

combining modules 33, 49COAMCO8 37, 67Diplexer 79DUAMCO 33, 55FDUAMCO 34, 55FICOM6 39, 74HYBRID4 35, 53HYBRID6 64MDUX 62MFDUAMCO 34

combining options 10configuration 10core modules 24

COBA 26COREXT 27COSA 27

core redundancy 28COREXT 27corner frequency 84COSA 27cross connect 26CU 30

output power level 32

D

DC and battery controller 42DC LE breaker panel 43DC panel (DCP) 43DCBCTRL 42DCP LEBREAK 43dimensions 12Diplexer 79double TRX mode 31dual band configurations 10dual TMA 70DUAMCO 33

functionality 55gain 57insertion loss 56specials 58

dust filter 48DUSTFILM 48

EECU 30

FCC certification 84, 85output power level 32

Eltek rack 19emergency operation 41

examples of cell configuration 80

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Ffan unit 48FCC certification 1900 85FCC certification 850 84FDUAMCO 34

functionality 55gain 57insertion loss 56specials 60

FICOM6 39functionality 74gain 78insertion loss 78

filter 48FlexCU 31

FCC certification 84, 85operation modes 31output power level 32

fourfold receive diversity mode 31frequency bands 13frequency configurations 10frequency hopping 10

Ggain (RX path)

MDUX 66gains

(F)DUAMCO 56MFDUAMCO 54MHA 72TMA 73

GCU 30output power level 32

HHDLC link 29hot plug-in 25HYBRID4 35

functionality 53HYBRID6

functionality 64

Iingress protection rating 12insertion loss (TX path)

MDUX 66

LLE 48link equipment 48

losses(F)DUAMCO 56MFDUAMCO 54MHA 72TMA 73

MMDUX 35

functionality 62gain 66insertion loss 66

MFDUAMCO 34functionality 50gain 54insertion loss 54

MHA 37min/max configuration 10MSU AC 42MSU DC 42MUCO mode 51, 56, 76

and MHA 38and TMA 38

OOPEXAL 47output power 32overvoltage protection and tracer 45overvoltage protection external alarms 47OVPT 45

Ppower consumption 12power supply by Eltek rack 19power supply modules

AC/DC panel 41AC/DC system 40alarm collection terminal boards 43battery backup 41DC and battery controller 42DC LE breaker panel 43DC panel 43emergency operation 41MSU AC 42MSU DC 42

Rredundancy 11redundancy (core) 28releases 9remote electrical tilt 34RET 34

RF output power 32

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RX pathgains (F)DUAMCO 56gains MFDUAMCO 54

Ssingle TMA 70single TRX mode 31

Ttechnical data 12temperature range 12TMA 37traffic channels 11TRX mode (FlexCU) 31TRX per BTS 12

TRX per cell 12TX pathlosses (F)DUAMCO 56losses MFDUAMCO 54

Vvolume 12

Wweight 12

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