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Nokia Flexi EDGE BTS Overview
Module Descriptions
Installations/Configurations
Commissioning/Integration
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Flexi EDGE BTS is a modular base station for GSM/EDGE capacity and coverage. Its
modular design makes site acquisition and installation easier, reducing the time needed
for rolling out network coverage in a new area. Flexi EDGE BTS allows using existing site
space sparingly and efficiently.
Flexi EDGE BTS introduces GSM/EDGE modules to the Flexi BTS family. Flexi EDGE BTS is
based on the same Nokia Flexi platform as Flexi WCDMA BTS, enabling efficient
multiradio sites including GSM/EDGE and WCDMA/HSPA and other radio technologies
such as WiMAX in the future.
Flexi EDGE BTS is highly integrated. For example, it supports up to 24 TRXs (12 Dual
TRXs) in the volume of a traditional single BTS cabinet. There is virtually no limit to site
capacity, due to synchronised Flexi EDGE BTS chaining.
Flexi EDGE BTS provides top-of-class RF performance with balanced link, similar toexisting UltraSite EDGE BTS. In standard Capacity mode, it provides TRX output power
of 47 dBm (ca. 46 dBm at BTS antenna port in combiner by-pass configuration) and
system sensitivity of -115.5 dBm. Double Power TRX and coverage features secure an
even higher performance for coverage-limited environments.
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Constructions and Modules
A functional Flexi EDGE BTS can be built with just two logical modules: Flexi EDGE
System Module and Flexi EDGE Sector Module. The Sector Module is a logical unit
consisting of two building blocks: Dual TRX Module (EXxA) and Dual Duplexer Module
(ERxA). Typically one Sector Module is needed per sector. Sector expansions are done
just by adding more Dual TRXs and optional Wideband Combiners (WBCs). Another
option is to use the Remote Tune Combiner Module together with Dual TRX Modules;the Dual Duplexer Module is then not needed.
Flexi EDGE System Module (ESMA)
Flexi EDGE Dual TRX Module (EXxA)
Flexi EDGE Dual Duplexer Module (ERxA)
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Flexi EDGE System Module
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The System Module (ESMA) is a unit providing BTS common functionalities and
external and internal connections for the whole BTS. The BTS software is stored in the
System Module.
The System Module also receives and stores the unit identification information of all
other units of the BTS. The System Module supports configurations of up to 12 TRXs.
This equals to 6 x Dual TRX Modules (EXxA). For larger configurations, the System
Extension Module (ESEA) is used along with the System Module.
One ESMA is always needed per BCF (object in BSC)
The main functions of the System Module are:
BTS O&M
BTS integrated transport
Module bus control and BTS synchronisationPower distribution (48 VDC) to other modules
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BTS O&M
Main BTS O&M functions are:
Software downloading (There can be simultaneously two software versions in a System Module)
Configuration management (BTS configuration autodetection)
Alarm handling and recoveryBTS reference clock management
External alarms and controls (EAC). The System Module provides 6 BBU alarms inputs, 12 external
alarm inputs and six control output connections. When more than 12 external alarm inputs are
needed, a System External Alarm Module (FSEB) can be used.
BTS integrated transportThe System Module handles external and internal transmission of the BTS. It has the physical
transmission interfaces from the BTS to the BSC, and it terminates the Abis interface.
There are four different network interface alternatives in TDM mode:
E1 symmetric 120 ohms, RJ48
T1 symmetric 100 ohms, RJ48
E1 asymmetric 75 ohms, SMB
Nokia FlexBus for Nokia microwave radios, TNC
There are two different network interface alternatives in PW mode:
100Base-T Ethernet (RJ48)
1000Base-LX or 1000Base-SX optical Gigabit Ethernet (requires additional SFP module)
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Sub Module Type Interface Number of Interfaces per System Module
E1/T1 and PWE transmission sub-module (FIQA)
E1/T1 (symmetric) 4
100Base-T Ethernet 2(1 interface usable)
1000Base-LX or 1000Base-SX Ethernet 1
FIQA
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Module Bus Control and BTS Synchronisation
The System Module has an integrated BTS internal and external synchronisation functionality. It can
be synchronised to the incoming Abis line or to an external synchronisation source (other BTS or
Location Measurement Unit, LMU). It distributes the clock signals within the BTS and can maintain
clock synchronisation if the external synchronisation source is lost.
The System Module also acts as a main communication link within the BTS and the connected
modules (Dual TRX module, Remote Tune Combiner module) via the Module Bus.
Power Distribution
The operating power is supplied to Flexi EDGE BTS from a single point in the System Module.
The System Module distributes the 48 VDC power further to up to six other modules of the
BTS. The power distribution capability can be increased with an additional System Extension
Module. The main function of the System Extension Module is to increase the number of
Dual TRX Module connections.
There is a stand-by switch (PWR) on the front panel of the System Module power
distribution unit. The switch is used for switching System Module unit power ON/Stand-by
when DC input voltage is connected. When DC power is connected to the System Module,
the default mode is "ON", even if the last mode was "Stand-by" when DC power was
disconnected. Switching to "Stand-by" mode disables power to all Dual TRX Modules
connected to the System Module.
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System Module (ESMA) Main Blocks
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System Module (ESMA) main blocks
System Module (ESMA) includes the following functional blocks:
System control block
BTS O&M
TRS O&M
Transport network layer procedures
System Module control
System timing block
Common system reference frequency and air interface timing generation
BTS frame clock and frame number generation
Interface to Location Measurement Unit (LMU)External synchronization I/O
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Dual TRX Module (EXxx)
The Dual TRX Module (EXxx) is a two-carrier TRX unit. The module contains the common (2 carrier)
baseband part and two separate RF parts for two transceivers (transmitter and receiver chains) andspace for two optional Wideband Combiner Modules (Ewxx).
The Dual TRX Module (EXxB) hardware can simultaneously support the following future BSS
features:
Full Voice services over Adaptive Multi-user Orthogonal Sub channels (VAMOS)
Enhanced General Packet Radio Service Evolution (EGPRS2)
The Dual TRX Module (EXxx) is used as:
a combined module with the Dual Duplexer Module (ERxx), making a logical Sector Module
or a stand-alone TRX module with the Remote Tune Combiner (ECxA) Module
or a stand-alone extension TRX module.
The Dual TRX Module and System Module (ESMA) communication is managed through a singleEthernet interface. Each transceiver within the Dual TRX Module can be separately activated with a
licence key at the BSC.
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The Dual TRX Module contains two transceivers that can be used:
as a separate TRX in the same sector
as a separate TRX in different sectors
or as a Double Power TRX.or as an Intelligent Downlink Diversity (IDD) TRX.
There are separate Dual TRX Modules for each frequency band that Flexi EDGE BTS
supports:
EXTxGSM800
EXGxGSM900
EXDxGSM1800
EXPxGSM1900
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Dual TRX Module (EXxx) main blocks
The Dual TRX Module (EXxx) includes the following functional blocks:
Baseband
TRX, O&M, telecom and digital signal processing (DSP)
Ethernet interface for control, user and baseband hopping data
Synchronisation
Digital up/down conversion and filtering
TX and RX data conversion
TX Double Power support
Intelligent Downlink Diversity (IDD)
4-way Uplink Diversity support
RX 4-Way Interference Reject Combining (IRC) support
Temperature management
Power supply
Power distribution of TRX internal supply voltages
Transmitter
Direct conversion from TX interface to TX RF
Digital power control
TX Double Power and IDD support
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Receiver
Dual down-conversion from RX RF to RX interface
Diversity reception
Digital Automatic Gain Control (AGC)
Synthesisers
Local oscillator signals for TX and RX up/down conversions
Frequency hopping capability on timeslot basis
Fan Module
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Property Value
Nominal system voltage 48 V DCInput voltage range 40.5 - 57 V DC
Dual TRX Module (EXxx) power requirements
EXTx/EXGx (800/900) EXDx (1800) EXPx (1900)
Maximum 325 W 365 W 385 W
Nominal 295 W 335 W 355 W
Idle39 W (EXTA/EXGA)
45 W (EXTB/EXGB)
37 W (EXDA)
50 W (EXDB)
37 W (EXPA)
50 W (EXPB)
One PA in use 180 W 200 W 210 W
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Dual TRX Module (EXxx) interfaces
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Label name on
module
Description Connector type Cable type Interface(s) Signal direction
(to/from the module)
BUS
Ethernet (1000 Base-
T/100 Base-TX)
baseband processing
of end user, hopping,
synchronisation, and
O&M data
MDR 26 (female)
Bus cable, AWG30
Twinax, MDR 26
(male)
length: 1054/1554
mm (41.5/61.2 in.)
ESMA, ESEATo and from the
module
ER_APower and control
interface for the ERxAMDR 36 (female)
ERxA cable, MDR 36
(male)
hard-wired with
other end fixed to
ER_A
length: 200 mm (7.9
in.)
ERxATo and from the
module
PWR-48 VDC input power
with fuse protection
Multi-Beam XL
(female)
Power cable, 2 x
AWG12, Multi-Beam
XL (male)
length: 1188/2000
mm (46.8/78.7 in.)
ESMA, ESEATo and from the
module
DP
Synchronous
combining of both
transmitters in themodule to generate
one GSM/EDGE carrier
capacity with
increased output
power
NOTE: Interface to the
EWxA (required
module with the DP
feature)
Molex Microfit (male)
DP cable, 4 x AWG24,
Molex Microfit
(female)
length: 203 mm (8.0
in.)
EWxATo and from the
module
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RxA, RxB (blue)
Receives a digitally
modulated
GSM/EDGE RF carrier
in accordance with
the appropriate
telecommunications
standard (Rx input)
QMA (female)
RF cable, SemiFlex
50, QMA (male)
length:
172/275/1300 mm
(6.8/10.8/51.2 in.)
ERxA, ECxA To the module
RxA Div , RxB Div(blue)
Four-way uplink
receive diversity
(4UD)
NOTE: This connector
is also used in 2UDconfigurations which
require splitting an
EXxx between cell
areas (for example,
cost optimized
configurations, 1+3).
QMA (female)
RF cable, SemiFlex
50, QMA (male)length:
172/275/1300 mm
(6.8/10.8/51.2 in.)
ERxA, ECxA To the module
TxA, TxB (red)
Transmits a digitally
modulated
GSM/EDGE RF carrier
in accordance with
the appropriate
telecommunications
standard (Tx output).
QMA (female)
RF cable, SemiFlex
50, QMA (male)
length:
172/275/1300 mm
(6.8/10.8/51.2 in.)
ERxA, EWxA, ECxA From the module
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Colour Explanation
Cycling colours BTS has requested highlighting for TRX module and timer is still running.
Red, blinking
7606 alarm is active on one of the carriers or
7607 alarm is active on one or on both carriers.
7607 alarm on IDD TRX or DPTRX TRX object.
Red, stable
TRX_OM SW is not running or
7606 alarm is active on both carriers.
7606 alarm on IDD TRX or DPTRX TRX object.
Yellow, blinking
TRX_OM SW state is Clock sync or
one or both carriers are in TRX_OM SW state TRX configuring, Wait for OMUSIG
establishment or Wait for system information.
Yellow, stable
Both carriers are blocked from BTS or
both carriers have TRXSIG channel disconnected when in TRX_OM SW state is
supervisory.
IDD TRX or DPTRX object blocked/locked or IDD TRX or DPTRX TRX object is
Shutdown (but is still providing power/control for DDU supporting other TRX's or
are powered due to malfunctioning e.g. power cycle in ESEA) from BSC or
IDD TRX or DPTRX TRX object has TRXSIG channel disconnected when the carrier
state is supervisory.
Green, blinking
Only one carrier is in the supervisory state and no 7606 or 7607 alarm is active
and LAPD on TRXSIG is connected for this carrier, or.
both carriers are in supervisory state but one carrier has LAPD on TRXSIG channel
disconnected.
Not applicable when the TRX module is configured for IDD TRX or DPTRX TRX
object.
Green, stable
Both carriers are in TRX_OM SW state supervisory and no 7607 or 7606 alarms
are active.
IDD TRX or DPTRX TRX object is in supervisory state and no 7606 / 7607 alarmsare active and TRXSIG is connected.
Dual TRX Module (EXxx) LED indications
The Dual TRX Module (EXxx) has two tri-colour LEDs on the front panel to indicate the operational status of the
module and all fault conditions during operation.
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Dual Duplexer Module (ERxA)
The Dual Duplexer Module and the Dual TRX Module (EXxA) create one Sector Module. At least one Dual Duplexer Module is
needed per sector, depending on the configuration (concerns non-RTC configurations).
The Dual Duplexer Module is always attached to the Dual TRX Module, which provides the Dual Duplexer Module with powerand O&M link. Extension Dual TRX Modules are installed without the Dual Duplexer Module.
The Dual Duplexer Module provides two antenna connections (configured from 1 or 2 sectors) of Flexi EDGE BTS for by-pass
and wideband combined configurations.
The Dual Duplexer Module supports antenna sharing (co-siting) with another BTS as long as the frequency range meets the
given Nokia specifications.
The Dual Duplexer Module contains two duplex filters, two low-noise amplifier (LNA) chains, two Bias-Ts, and a common TRX
loop for TRXs in one sector. The TRX loop is controlled through the Sector Module.
The Bias-T is a circuit and function to supply power to an MHA. The Return Loss monitor is a separate circuit and function that is
independent of the Bias-T. The functionality is now in the Dual Duplexer Module, and a separate unit on top of BTS cabinets
common in traditional solutions is no longer needed.
The MHA current monitor allows the BTS to determine an alarm or fault condition of the MHA.
The TX forward power alarm allows the BTS to report an alarm if insufficient TX power is at the DDU's TX connector.
The LNAs have two gain states:
1. high-gain and
2. adjustable low-gain settings.
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The high-gain state (HGS) is the default mode when the BTS is not configured with an MHA. The low-gain state
(LGS) is used when the BTS is configured with an MHA; the LGS settings, which are in 0.5dB steps, are used to
overcome the cable loss for the cable connecting the MHA to the DDU's antenna connector.
There is a separate Dual Duplexer Module for each frequency band:
ERTAGSM800ERGAGSM900 full band
ERHAGSM900 SB-H
ERJAGSM900 SB-J
ERDAGSM1800 full band
ERPAGSM1900 full band
Band RX (MHz) TX (MHz) ARFN
900
(ERGA) / (E-GSM)
890.0915.0
880.0890.0
935.0960.0
925.0935.0
1124
9751023.0
900J (ERJA) 890.0915.0 935.0960.0 1124
900H (ERHA) 897.5
915.0 942.5
960.0 38
124
1800 (ERDA) 1710.01785.0 1805.01880.0 512885
1900 (ERPA) 1850.01910.0 1930.01990.0 512810
800 (ERTA) 824.0849.0 869.0894.0 128251
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The Dual Duplexer Module can store two software versions: Active and Backup. The Dual Duplexer
Module is always connected to a Dual TRX Module. After a Dual TRX Module reset, the Dual Duplexer
Module software version is checked. If the Dual Duplexer Module does not contain correct software
matching with the running BTS software version, the new Dual Duplexer Module software is downloaded
from the Dual TRX Module.
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Dual Duplexer Module (ERxA) main blocks
The Dual Duplexer Module (ERxA) includes the following functional blocks:
Duplex Filter
RX and TX filtering
TX and RX coupling to one antenna interface
RX Front End
RX low-noise amplifier (LNA)
RX Multicoupling
Support for co-siting (antenna sharing)
TRX Loop
TRX loop path between Dual Duplexer Module's TX input and RX output
Signal mixing from TX to RX band
Timeslot-based capability to run loops
Loop connection capability from either TX input to any RX Output
Bias-T alarm
Masthead amplifier (MHA) interface and power supply
Antenna supervisory
Return Loss monitor values are reported to the TRX O&M.
The MHA current monitor allows the BTS to determine an alarm or fault condition of the MHA.
The TX forward power alarm allows the BTS to report an alarm if insufficient TX power is at the DDU's TX connector.
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Label name on module Description Connector type Interface(s)
Ant A, Ant B Antenna interface 7/16Antenna jumper or feeder
cables
TxA, TxB (red) 2 Tx inputs QMA EXxA, EWxA, EWxB
ExtA, ExtB (blue) 2 external Rx outputs QMA External receiver
ExtA
RxAO
Provides an external BTS with
the RX diversity signal from ANT
A when antenna sharing (co-
siting) is used.
QMA
External BTS NOTE: The pre-
installed RxAO-RxAI cable on the
Dual Duplexer Module must
remain connected for all
standard, non-antenna sharing
configurations. It is required for
a complete RF path from ANT A
to RxA1-4. See the figure in
section Dual Duplexer Modulemain blocks for an illustration.
RxAI
Receives Rx signal input from an
external BTS source when
antenna sharing (co-siting) is
used. It is connected to RxA1-4.
QMA
External BTS NOTE: The pre-
installed RxAO-RxAI cable on the
Dual Duplexer Module must
remain connected for all
standard, non-antenna sharing
configurations. It is required for
a complete RF path from ANT A
to RxA1-4. See the figure in
section Dual Duplexer Module
main blocks for an illustration.
ExtB
Provides an external BTS with
the RX diversity signal from ANT
B when antenna sharing (co-
siting) is used.
QMA External BTS
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Colour Explanation
RedDual Duplexer Module software is not running, or
Major alarm (on both antenna paths)
Red, blinkingMinor alarm (on one or both antenna paths), or
Major alarm (on one antenna path)
Yellow, blinking SW start-up or configuration ongoing
Green Module operational (cell can be locked in BSC)
Green, blinking Module is loading software
Dual Duplexer Module (ERxA) LED indications
The Dual Duplexer Module (ERxA) has one tri-colour LED on the front panel to indicate the operational status of the
module and all fault conditions during operation.
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Flexi EDGE Remote Tune Combiner Module
The optional Remote Tune Combiner (RTC) Module combines up to six TX signals from the Dual TRX
Modules together into a single TX antenna with a minimum loss in large configurations. It also provides
the antenna connections for duplexed RX and TX signals, as well as antenna connection for RX diversity
signal. The Remote Tune Combiner Module is always used together with Dual TRX Modules; the DualDuplexer Module is then not needed. The System Extension Module is needed with the Remote
Tune Combiner Module. The Remote Tune Combiner Module supports antenna sharing (co-siting) with
another BTS.
ECxA can only be installed in a cabinet and it is available for the following ETSI frequency bands:
ECGA 900 MHz
ECJA 900 MHz J-subband
ECDA 1800 MHz
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Flexi EDGE Remote Tune Combiner(ECxA) Block Diagram
The Remote Tune Combiner can store two software versions: Active and Backup. After a sector or RTC
reset, the Remote Tune Combiner software version is checked. If the Remote Tune Combiner does not
contain correct software matching with the running BTS software version, the new Remote Tune Combiner
software is downloaded from the System Module (ESMA) via the System Extension Module (ESEA)
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Remote Tune Combiner (ECxA) Module LED indications
Remote Tune Combiner Module (ECxA) has one tri-colour LED on the front panel to indicate the operational
status of the module and all fault conditions during operation
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Creating Configurations for Flexi EDGE BTS
Unit ESMA BUS ESMA PWR ESEA BUS ESEA PWR
EXxA 1 1 1/7
EXxA 2 2 2/8
EXxA 3 3 3/9
EXxA 4 4 4/10
EXxA 5 5 5/11
EXxA 6 6 6/12
EXxA 7 4/10 7
EXxA 8 5/11 8
EXxA 9 6/12 9
ECxA 1 1 1/7
ECxA 2 2 2/8ECxA 3 3 3/9
Bus and power cabling principles for ECxA configurations
Bus and Internal Power Cabling Principles
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Unit ESMA BUS ESMA PWR ESEA BUS ESEA PWR
EXxA 1 1 1/7
EXxA 2 2 2/8
EXxA 3 3 3/9
EXxA 4 4 4/10
EXxA 5 5 5/11
EXxA 6 6 6/12
EXxA 7 4/10 7
EXxA 8 5/11 8
EXxA 9 6/12 9
EXxA 10 1/7 10
EXxA 11 2/8 11
EXxA 12 3/9 12
Bus and power cabling principles for ERxA configurations
The following main principles for bus and internal power cabling apply to configurations requiring
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The following main principles for bus and internal power cabling apply to configurations requiring
a System Extension Module (ESEA):
All configurations having a Remote Tune Combiner Module (ECxA), and
All configurations having a Dual Duplexer Module with 13-24 carriers (7-12 Dual TRX Modules (EXxA)).
Bus and internal power cabling principles:
Make sure to connect a bus cable from BUS OUT on the System Module (ESMA) to BUS IN on
the System Extension Module.
Connect all Dual TRX Module bus cables to the System Extension Module.
Connect all Remote Tune Combiner Module bus cables to the System Module.
For Remote Tune Combiner Module configurations, the Dual TRX Module numbering should be from 1-9 from
bottom to top. The Remote Tune CombinerModule numbering should be from 1-3 from lowest tohighest. Module bus and power cables must be connected to the System Module or System ExtensionModule, as
specified inTable Bus and power cabling rules for ECxA configurations.
For Dual Duplexer Module configurations, Dual TRX Module numbering should be 1-12 from bottom to top.
Connect the module bus and power cables to theSystem Module or System Extension Module port, as specified in
Table Bus and power cabling principles for ERxA configurations.
Use an extension bus cable 994939 to connect the top (or farthest) Dual TRX Module tothe System Extension Module. For all other Dual TRX Moduleconnections, use the standard bus cable 994938.
Two 994939 cables are provided in the System Extension Module delivery. Keep the other cable as a spare. It can
be used to connect the System ExtensionModule to the System Module, or to connect another Dual
TRX Module to the System Extension Module if required by 3rd party cabinet installations or if there are other
special cable routing requirements.
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Sample Configuration:
1+1+1/2+2+2 ERxx Configuration
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External power cables in 1+1+1/2+2+2 FCIA
configuration
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Connecting Bus Cables in FCIA Installation
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Connecting Bus Cables in FCIA InstallationPurpose:
The bus cables are connected between the System Module (ESMA) and each of the Dual TRX (EXxA)
Modules
Same w/ Cabinet Configuration
Connecting Internal Power Cables in FCIA Installation
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Same w/ Cabinet Configuration
Connecting Internal Power Cables in FCIA InstallationPurpose
The internal power cables are connected between the System Module (ESMA) and each of the Dual TRX
Modules (EXxA) and the optional Remote Tune Combiner Modules (ECxA). The cables are used to distribute
power to the Dual TRX Modules or Remote Tune Combiner Modules
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Connecting RF Cables
Purpose
RF cables are connected between the Dual TRX Module (EXxA) and Dual Duplexer Module (ERxA),
Wideband Combiner Sub-module (EWxx) or Remote Tune Combiner Module (ECxA), or between the
Dual Duplexer Module and Wideband Combiner Submodule.
Antenna jumper cable
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Sample Configuration:
4+4+4 RTC 1UD or 2UD configuration
To create a 4+4+4 RTC 1UD or 2UD configuration, you need:
6 Dual TRX Modules (EXxA)
1 System Module (ESMA
1 transmission sub-module (FIxA) 3 Remote Tune Combiner Modules (ECxA)
1 System Extension Module (ESEA)
6+6+6 RTC 1UD or 2UD configuration
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6+6+6 RTC 1UD or 2UD configuration
To create this configuration, you need:
9 Dual TRX Modules (EXxA)
1 System Module (ESMA)
1 transmission sub-module (FIxA)
3 Remote Tune Combiner Modules (ECxA) 1 System Extension Module (ESEA)
Dual Duplexer Configurations
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Dual Duplexer Configurations
4+4+4 2-way 2UD configuration
For creating this configuration, you need:
6 Dual TRX Modules (EXxA)
3 Dual Duplexer Modules (ERxA)
1 System Module (ESMA) 1 transmission sub-module (FIxA)
6 Wideband Combiner Sub-modules (EWxx)
1 FCIA
Cabling Connections
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RF Cabling Connections
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8+8+8 4-Way Configuration
To create an 8+8+8 4-Way 2UD configuration, you will need
the following modules:
12 Dual TRX Modules (EXxA)
3 Dual Duplexer Modules (ERxA)
18 Wideband Combiner Sub-modules (EWxx)
1 System Module (ESMA)
1 System Extension Module (ESEA)
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Accessing Flexi EDGE BTS
IP:
192.168.255.130
255.255.255.128
192.168.255.129
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SW Upgrade
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Undo commissioning
Manual commissioning
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Send SCF