activating and testing satellite abis

7/27/2019 Activating and Testing Satellite ABIS

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Activating and Testing BSC4040:Satellite Abis

DN9812652Issue 5-1 en

# Nokia Corporation 1 (30)

BSC3119Nokia BSC/TCSM, Rel. S12, ProductDocumentation, v.1


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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 document is intended for the useof Nokia's customers only for the purposes of the agreement under which the document issubmitted, and no part of it may be reproduced or transmitted in any form or means without the

prior written permission of Nokia. The document has been prepared to be used by professionaland properly trained personnel, and the customer assumes full responsibility when using it.Nokia welcomes customer comments as part of the process of continuous development andimprovement of the documentation.

The information or statements given in this document concerning the suitability, capacity, or performance of the mentioned hardware or software products cannot be considered binding butshall be defined in the agreement made between Nokia and the customer. However, Nokia hasmade all reasonable efforts to ensure that the instructions contained in the document areadequate and free of material errors and omissions. Nokia will, if necessary, explain issueswhich may not be covered by the document.

Nokia's liability for any errors in the document is limited to the documentary correction of errors.NOKIA WILL NOT BE RESPONSIBLE IN ANY EVENT FOR ERRORS IN THIS DOCUMENTOR FOR ANY DAMAGES, INCIDENTAL OR CONSEQUENTIAL (INCLUDING MONETARYLOSSES), that might arise from the use of this document or the information in it.

This document and the product it describes are considered protected by copyright according tothe applicable laws.

NOKIA logo is a registered trademark of Nokia Corporation.

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

Copyright Nokia Corporation 2007. All rights reserved.

2 (30) # Nokia Corporation DN9812652Issue 5-1 en

Activating and Testing BSC4040: Satellite Abis


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Contents

Contents 3

List of tables 4

List of figures 5

Summary of changes 7

1 Satellite Abis 91.1 Configuration requirements 121.2 File descriptions in Satellite Abis 131.3 Effects of Satellite Abis on interfaces 141.4 Recommendations 14

2 Activating and testing Satellite Abis 172.1 Activating Satellite Abis 172.2 Testing Satellite Abis 26

3 Deactivating and testing Satellite Abis 29



Contents


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List of tables




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List of figures

Figure 1. Satellite link in the Abis interface 10

Figure 2. Signal Timing selection from Traffic Manager 23



List of figures


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Summary of changes

Changes between document issues are cumulative. Therefore, the latest document issue contains all changes made to previous issues.

Changes made between issues 5-1 and 5-0

Added Timer 3141 patching instructions to step 10, Modify (E)GPRS related parameters under Activating Satellite Abis.

Information on Satellite Abis' compatibility with Flexi EDGE BTS SW has beenadded in Satellite Abis.


References to TCSM2 have been changed into TCSM to cover both TCSM2 and

TCSM3i. References to TCSM1 have been removed.

The references in Related topics have been updated.

Activating and testing Satellite Abis

Steps for activating and checking Acoustic Echo Canceller have been added.

The patching instructions for timer T3141 have been removed.


Satellite Abis

Added that standard SGSN is used with Satellite Abis.

A sentence about EGPRS Dynamic Pool was added to Configuration requirements.

Information on UltraSite and MetroSite was added to File descriptions in Satellite Abis.



Summary of changes


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Recommendations on GPRS and EGPRS parameter values have been added toEffects on interfaces in Satellite Abis.

A paragraph on defining the BSC to satellite Abis use only has been deleted fromRecommendations.


Instructions on activating Satellite Abis in UltraSite or MetroSite EDGE BTShave been added.

Figure Signal Timing selection from Traffic Manager has been added.

Added that GPRS and EGPRS capable mobile phones, and an operational Packet Core Network are needed while testing Satellite Abis.

Step 5, make data calls, has been added to the testing instructions.

Deactivating and testing Satellite Abis

Information on deactivating GPRS and EGPRS in satellite Abis has been addedto step 1.




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1 Satellite AbisSatellite Abis enables you to create coverage of the network in areas where thecoverage could not be otherwise implemented due to the limitation of transmission media. Satellite circuits are useful when connecting extremelyremote locations, but also when no other transmission means exist. The SatelliteAbis is an application software intended for connecting the BSC to remote BTSs.Typically, these remote BTSs are used in special low-capacity and temporaryapplications. Only a minimum number of equipment is required at the remotecells.

The general arrangement of the Satellite Abis connection is presented in Figure 1Satellite link in the Abis interface.



Satellite Abis


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Figure 1. Satellite link in the Abis interface

To support satellite BSC-BTS circuits, Satellite Abis enables a connection of BTSs to a BSC over a transmission path. The main drawback of a (geostationary)satellite circuit is the relatively long one-way end-to-end delay of approximately260 - 280 ms. As for bit error (BER) performance, the satellite circuits behave asradio links with a possibility of deep fades even down to the total loss of thesignal. Long delay together with bit errors decreases signalling messagethroughput. BSC and BTS parameters and timers are adapted for the long delay.

Tests using satellite circuits have shown the following:

1. The delay slows down all signalling traffic which needs frequent handshakes. GSM system timers are not designed for long delays, and theymust be set correctly.

2. The TRAU frame time alignment function does not tolerate long delays.The time alignment function forms a control loop between the transcoder and the BTS, and with excessive delay this control loop becomes unstable.

SGSN

BTS MSC

BTS

TC HLR

Satellite

Abisinterface

Ater interface

A

interfaceMSC-HLRinterface

BSC

Gb




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The Satellite Abis summary

. Satellite Abis is an application software

. Satellite Abis can be utilised either on Abis or Ater interface

. Satellite Abis is introduced per BSS

. Satellite Abis is activated by a parameter switch in the BSC and the BTS

. Standard mobile phones are used

. Standard MSC is used

. Standard SGSN is used

. There are no alarms involved in Satellite Abis

Related topics in Satellite Abis

. Test and Activate. Transmission

. Activating and testing Satellite Abis

. Deactivating and testing Satellite Abis

Other related topics in BSC/TCSM documentation

. References.

Commands. MML Commands

. DF - Memory File Handling

. EG - GSM Timer and BSC Parameter Handling

. EQ - Base Transceiver Station Handling in BSC

. ER - Transceiver Handling

. EV - BCF Hardware Database Handling

. EW- BCF Software Handling

. WO- Parameter Handling. Parameters

. BSS Radio Network Parameter Dictionary



Satellite Abis
http://-/?-http://-/?-


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1.1 Configuration requirements

Satellite Abis in ETSI and ANSI networks

Networks based on European ETSI standards are mainly discussed here. SatelliteAbis is also available in networks based on American ANSI standards. Wheredifferences arise because of ANSI standards, these are separately mentioned.

The satellite equipment must be compatible with Nokia GSM equipment and thusfulfil the following prerequisites in the Abis satellite link:

Networks based on ETSI standards

. Interfaces operate at the bit rate 2 Mbit/s. Typically only some time slots of the 2 Mbit/s trunk carry traffic. The BTS - BSC connection is transparent for these time slots, and satellite transmission capacity is reserved only for these time slots. The minimum transmission capacity requirement is two 64kbit/s time slots per one TRX. The normal requirement is two and a half time slots per one TRX. EGPRS Dynamic Abis Pool provides additionaltransmission capacity which is required by higher packet data bitrates.

. Interface must comply with ITU-T Recommendation G.703.

. Framing must comply with ITU-T Recommendation G.704.

. HDB3 line coding must be used.

.

Line impedance must be 75 or 120 ohms.. The use of CRC-4 error detection is recommended.

. The bit error ratio (BER) must always be better than 3x10E-5 over the BTS- BSC path and typically better than 10E-6.

Networks based on ANSI standards

. Interfaces operate at the bit rate 1.5 Mbit/s. Typically only some time slotsof this trunk carry traffic. The BTS - BSC connection is transparent for these time slots, and satellite transmission capacity is reserved only for these time slots. The minimum transmission capacity requirement is two 64kbit/s time slots per one TRX. The normal requirement is two and a half time slots per one TRX. EGPRS Dynamic Abis Pool provides additionaltransmission capacity which is required by higher packet data bitrates.

. Interface and framing must comply with ANSI Recommendation T1.403.

. B8ZS line coding must be used.

. Line impedance must be 100 ohms.




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. The use of CRC-6 error detection is recommended.

. The bit error ratio (BER) must always better than 3x10E-5 over the BTS -BSC path and typically better than 10E-6.

1.2 File descriptions in Satellite Abis

The decision between the normal or the satellite build is made when the BTS build is set at the BSC. The BTS SW Release Note contains the file list.

Nokia 2nd generation BTS (DE21/DF12)

From the version B10.0 onward a special Satellite Abis software build is needed.

For example, GSM/DCS BTS SW B10.0 contains two master files; the first (BTS_S301.101) is intended for regular Abis, and the second (BTS_S301.033) isintended for Satellite Abis.

FUC configuration files are also different for regular Abis and Satellite Abis; for example, CFG_S301.101 is intended for regular Abis, and CFG_S301.033 isintended for Satellite Abis.

Nokia Talk-family BTS (DE34/DF34) or Nokia PrimeSite BTS (DE45/DF45)

From the version DF2.1 onward a special Satellite Abis software build is needed.For example, GSM/DCS BTS SW DF3.0 contains two master files; the first (BTS_S301.180) is intended for regular Abis, and the second (BTS_S301.19B) isintended for Satellite Abis.

FUC configuration files are also different for regular Abis and Satellite Abis; for example, CFG_S301.18F is intended for regular Abis, and CFG_S301.199 isintended for Satellite Abis.

Nokia Ultrasite or Metrosite EDGE BTS

There is no separate master file in BTS SW build of Ultrasite and Metrosite BaseStations for satellite Abis.

Nokia Flexi EDGE BTS

Satellite Abis is not compatible with Nokia Flexi EDGE BTS SW EP1.0.However, it can be used with the software version EP2.0



Satellite Abis


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1.3 Effects of Satellite Abis on interfaces

Only the Abis interface is affected by Satellite Abis. The changes are caused by

the increased delay which can disturb procedures relying on handshakings or timers.

For call handling, the most important change concerns the LAPD layer L2 timer T200 (see ETSI Recommendation ETS 300 595). This timer is increased from240 ms to 1000 ms. Note that this timer affects both the telecommunications andOMU signalling channels in the whole BSS.

Timers at both ends (BSC and BTS ends) of the link are modified. Also theLAPD parameter K, Maximum number of outstanding frames, is modified fromK=2 to K=7. This applies only to LAPD frames whose SAPI value is 0.

Timers supervising BTS software downloading are increased to handle theincreased delay.

For GPRS and EGPRS the following parameter adjustments are recommended:

. Parameter BS_CV_MAX to value 15. Mobile entering to countdown procedure is based on BS_CV_MAX. The parameter determines howmany radio block periods the countdown procedure lasts in the end of anUL TBF. The optimal value depends on BSS RLC Round Trip Time, whichis large in case Satellite Abis is used.

. Timer T3192 value to 1 s. The MS uses this timer to determine how long tomonitor PACCH after the end of a TBF.

. Timer T3141 to value 1500 ms. BSS uses this timer to determine how longto wait for an MS response to TBF establishment on CCCH.

. Parameter CMAX to value 1%. BSS uses this parameter to determine themaximum GPRS/EGPRS territory size. Using more than one GPRS/ EGPRS timeslot will increase the abnormal TBF release probability.

1.4 RecommendationsBecause of the cumulative speech delay, it is recommended that only one satellitehop is used at the same time in a GSM/DCS network. However, it is possible touse MSC - MSC (or MSC - HLR) satellite circuits simultaneously, but thissituation has to be taken into special consideration. Further, public switchedtelephone network (PSTN) may use satellite circuits as well and this should beavoided if possible.




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The GSM system delay added to satellite path delay results in a delay (of echo) of approximately 180 ms + 520 ms = 700 ms. This exceeds the values given in theETSI Recommendation ETS 300 903 and the ITU-T Recommendation G.114 . If you (the telephone user) are aware of the delay, and (preferably) use echo control,the delay typically causes no harm. A remote MS to remote MS call suffers adouble delay (1400 ms) due to the double satellite hop.

It is highly recommended to use acoustic echo cancelling equipment in satelliteBSS to avoid problems with speech intelligibility due to long delay. Both theTCSM2 and the TCSM3i can support AEC with the Satellite Abis. In TCSM3ithere are no restrictions caused by the limited memory capacity.

It is not recommended to allow handovers between satellite cells and terrestrialcells due to possible frequency differences between these systems. Timingdepends on varying doppler shifts of the satellite system used. A typical doppler uncertainty is less than 2x10E-7. Using a BTS with an internal clock (MCLUclock unit) will avoid this timing problem, but regular clock unit maintenancemay be difficult.

As the BSC - BTS/TRX signalling capacity is reduced, any unnecessarysignalling should be avoided. However, some signalling cannot be avoided because the network elements depend on a common MSC.

You can reduce the signalling load in the following ways:

. Periodic location updating: Disable the periodic location updating

procedure or define it for a 24-hour interval.. Unnecessary paging: Define for satellite cells a location area of their own.

. Disable intra-BTS handovers (EIC = N, EIH = N).

MML commands affected: EHG, EHO, EHC.

. Disable queuing (MQL = 0%).

MML commands affected: EQH, EQO.

The call processing capacity of a busy hour call attempt (BHCA) is 70% of

normal GSM capacity in a satellite Abis link. This can be balanced by using moreTRXs (and SDCCH capacity) than are normally needed.



Satellite Abis


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2 Activating and testing Satellite AbisThe procedure is basically the same as for normal terrestrial BSC - BTS circuits.These instructions only show actions which are needed for satellite circuits.

For a description of Satellite Abis, see Satellite Abis.

Note

Satellite Abis is an application software product. It is not included in thestandard BSC software.

Note

It is recommended to use the default values in GSM (BSC and MSC) system

timers. Lower values than the default ones may be inadequate for handling thedelay of the satellite connection.

For deactivation instructions, see Deactivating and testing Satellite Abis.

For an overview, see Satellite Abis.

2.1 Activating Satellite Abis

You can control the use of the optional Satellite Abis functionality with thePRFILE parameter SATELL_ABIS_IN_USE which toggles Satellite Abis on or off as needed.

Steps

1. Activate Satellite Abis (WOC).

Set the value of PRFILE parameter SATELL_ABIS_IN_USE to 'TRUE'.



http://-/?-http://-/?-http://-/?-http://-/?-


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ZWOC:10,31,FF;

2. Check Satellite Abis (WOI).

ZWOI:10;

3. Activate Acoustic Echo Canceller (WOA).

ZWOA:2,371,A;

4. Check Acoustic Echo Canceller (WOS).

ZWOS:2,371;

5. Configure sufficient SDCCH capacity.

To implement this step, choose one of the following alternatives:

Steps

i. In TRX1, two time slots are defined for signalling: acombined BCCH and SDCCH/8 (six others are defined asTCHs). Use the following commands to configure SDCCHcapacity.

Lock the BTS (EQS).

ZEQS:BTS=:L;

Lock the TRX1 (ERS).

ZERS:BTS=,TRX=:L;

Modify the time slots (ERM).

ZERM:BTS=,TRX=:CH0=MBCCHC;

ZERM:BTS=,TRX=:CH1=SDCCH;

ii. In other TRXs, one time slot is defined for signalling(SDCCH/8, preferably timeslot zero) and seven others aredefined as TCHs. Use the following commands.

Configure SDCCH capacity (ERS, ERM).

ZERS:BTS=,TRX=:L;




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ZERM:BTS=,TRX=:CH0=SDCCH;

Unlock all locked TRXs (ERS).

ZERS:BTS=,TRX=:U;

Unlock the BTS (EQS).

ZEQS:BTS=:U;

Other parameters which minimise the SDCCH reservations:. Number of Slots Spread Trans (SLO) = 32. Max. Number of Retransmission (RET) = 2. Max Number of Repetition (NY1) = 5

To set these parameters, use the command

ZEQM:BTS=:SLO=32,RET=2,NY1=5;

Here identifies the remote BTS.

6. Configure TCSM.

You can configure the TCSM either locally or remotely. Remote access isrecommended. The following instructions give the commands for remote

access.

Before you start

There are no firmware requirements.

Steps

a. Create the remote session (DDT).

ZDDT:TCSM,;

Username EXPERTPassword SYSTEM

Here is the address of the transcoder.

b. Disable TRAU frame alignment in TCSM (ZRS).

ZRS:ALL:OFF





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Do you wan t conf igu rat ion changes to bepe rmanen t by saving them in f l ash memory?P le as e a ns we r ( Y/ N) Y

Further information

TCSM is activated by enabling the parameter on/off per BSC. InTCSM the time alignment can be turned off from the commandmenu. Because of the fixed MS timers, there may be re-attempts inthe signalling, causing limitations to the capacity of these cells.

c. Enable acoustic echo cancelling (AEC) (RU).

ZRU:ALL: =ON;

P le as e, c o nf ir m ( Y/ N) YDo you wan t conf igu rat ion changes to bepe rmanen t by saving them in f l ash memory?P le as e a ns we r ( Y/ N) Y

Here can be either FR, EFR, HR or AMR.

Note

The command depends on the type of speech coding used.

d. Set the AEC tail delay correctly (RU).

ZRU:ALL:DELAY=;

P le as e, c o nf ir m ( Y/ N) YDo you want conf igu rat ion changes to be pe rmanen tb y s a v in g t h e m i n f la sh m em or y? P le as e a n s we r (Y /N ) Y

Further information

Normally either 520 ms, 540 ms or 560 ms are suitable values for . You can check this with a listening test.

e. Check that all selections are correct (RC).

ZRC::10;

is the actual PCM used

f. Terminate the remote session.




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ZX

7. Activating Satellite Abis in a Nokia 2nd generation BTS (DE21/DF12).

Use the version 2.3 or later of the BTS OMU EPROM.

Before you start

Before activating Satellite Abis in a Nokia 2nd generation BTS (DE21/ DF12), the remote BTSs must be configured for satellite use by editing theHW database.

Steps

a. Give the timer value.

In the HW database, give the System defs / LAPD T200 timer thevalue 1000 ms using the HW database editor.

Further information

Normally T200 = 240 ms, which is the value used when T200 has been selected as 0.

b. Load the Satellite Abis BTS software build in the BTS.

c. Add new HW database (EVU, EVC, EVA, EVV).

If there is an active BCF HW database in the BSC, a new satellite-specific HW database must be uploaded, created, attached andactivated as follows

ZEVU::NAME=,EXT=;

ZEVC::NAME=,EXT=;

ZEVA::;

ZEVV::PAS;

8. Activating Satellite Abis in a Nokia Talk-family BTS (DE34/DF34) orNokia PrimeSite BTS (DE45/DF45).

Before you start





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There are no firmware requirements.

Before activating Satellite Abis in DE34/DF34, remote BTSs must be

configured for satellite use by editing the HW database.Steps

a. In the HW database, select the BCF/Units window.

b. Select the Abis type as Satellite.

Further information

This will further show the default satellite Abis value for LAPDT200 timer = 1000 ms. Normally, Abis type is normal and T200 =240 ms.

c. Load the Satellite Abis BTS software build in the BTS.

d. Add new HW database (EVU, EVC, EVA, EVV).

If there is an active BCF HW database in the BSC, a new satellite-specific HW database must be uploaded, created, attached andactivated as follows

ZEVU::NAME=,EXT=;

ZEVC::NAME=,EXT=;

ZEVA::;

ZEVV::PAS;

Further information

The HW database activation procedure is similar for both NokiaTalk-family (DE34/DF34) and Nokia 2nd generation (DE21/DF12)BTS types.

9. Activating Satellite Abis in UltraSite or MetroSite EDGE BTS.

Before you start




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Before activating Satellite Abis in an UltraSite or MetroSite BTS, remoteBTSs must be configured for satellite use by editing the Traffic Manager.Traffic Manager editor is in Ultrahub Manager for Ultrasite and in BTSManager for Metrosite.

Steps

a. From the Ultrahub Manager, open the Traffic Manager.

In the Configuration menu of the Nokia UltraSite BTS HubManager, select the Traffic Manager command. The Traffic Manager window is displayed.

b. In Traffic Manager window, select the Signal Timing as'Satellite'.

Figure 2. Signal Timing selection from Traffic Manager

c. Click OK to send the information to the BTS.

10. Modify (E)GPRS related parameters.

BS CV MAX parameter

Set BS_CV_MAX to value 15:

ZEGP:14:15;

After 5 minutes, disable and then re-enable GPRS in the cells where GPRSis active for the change to take effect.

Check the modified parameter:

ZEGO:PAR:;

Timer T3192





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Set timer T3192 to value 1s:

ZEGT:T3192:1,1:;

After 5 minutes, disable and then re-enable GPRS in the cells where GPRSis active for the change to take effect.

Check the modified parameter:

ZEGO:TIM:;

Patching Timer T3141

Note

The patching instructions for timer T3141 are valid only for S12 1.39-0 build.

Check the default value of timer T3141:

ZDFD:OMU:FF,F4,,W:;

LOADING PROGRAM VERSION 5.11-0

BSC3i BSC12 2007-01-23 08:16:41

O MU F ILE N :O 0 0F F0 00 0 R EC OR D N :O 0 00 00 0F 40 02 E 0 00 6 0 32 0 0 00 5 0 00 5 0 00 F 0 00 4 0 00 80 7D 0 0 7D 0 0 7D 0 0 BB 8 0 00 4 0 0C 8 0 00 0 0 00 2

COMMAND EXECUTED

Patch T3141 timer value to 1500 ms:

ZDFS:OMU:FF,F4,2,W:;

D O Y OU WAN T T HE SE S UB ST IT UT IO NS TO B E U PD AT ED O N D IS K ?( Y = YES, N = N O ) : Y

DO YOU WANT THESE SUBSTITUTIONS TO BE DISTRIBUTED ?( Y = YES, N = N O ) : Y

BSC3i BSC12 2007-01-23 08:17:13

O MU F IL E N :O 00 FF 00 00 RE CO RD N: O 0 00 00 0F 4 S UB RE CO RD N: O 0 00 00 00 2




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0320-5DC;

D O Y OU WAN T T HI S S UB ST IT UT IO N TO B E M A DE ?( Y = YES, N = N O ) : Y

RECORD/STRING SUBSTITUTED

DISTRIBUTION IS STARTING

DISTRIBUTION DONE

DISK HAS BEEN UPDATED

COMMAND EXECUTED

Check the patched value of timer T3141:

ZDFD:OMU:FF,F4,,W:;

LOADING PROGRAM VERSION 5.11-0

BSC3i BSC12 2007-01-23 08:17:32

O MU F IL E N :O 0 0F F0 00 0 R EC OR D N :O 0 00 00 0F 40 02 E 0 00 6 0 5D C 0 00 5 0 00 5 0 00 F 0 00 4 0 00 80 7D 0 0 7D 0 0 7D 0 0 BB 8 0 00 4 0 0C 8 0 00 0 0 00 2

COMMAND EXECUTED

CMAX parameter

Set CMAX to value 1%.

To modify CMAX parameter, GPRS must be disabled in the cell first:

EQV:BTS=:GENA=N;

Set CMAX to value 1% and enable GPRS:

EQV:BTS=:CMAX=1,GENA=Y;

Further information

Next, test Satellite Abis.





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2.2 Testing Satellite Abis

The tests cases include test calls, SW downloading and (implicit) BCF reset.

Before you start

Test enviroment requirements:

. Whole BSS dedicated for the satellite cells (correctly set up for SatelliteAbis)

. An operational MSC

. An operational Packet Core Network

.

Mobile stations (GPRS and EGPRS capable mobile phones). Transmission circuits to and from the operational satellite terminals

As regards pretesting or troubleshooting, if no real satellite circuits are available,the satellite may be simulated by suitable test equipment (adding a one-way delayof 280 ms and possibly also bit errors).

Steps

1. Create the correct BTS SW version.

ZEWC::MF=,EXT=,SDIR=;

2. Attach BTS SW version.

ZEWA:::;

Expected outcome

The BTS software is downloaded to the remote BTS after the software build attachment.

Note

If BTS SW is downloaded via satellite Abis, the download time is 4 to 5 timeslonger than normal SW download due to the slowness of satellite Abis.

3. Activate BTS SW version.




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ZEWV::;

4. Make test calls.

Make mobile-originated (MO) and mobile-terminated (MT) test calls totest the system

Expected outcome

Satellite delay will increase call set-up time by approximately 7 seconds.You can hear the increased speech delay.

Some UL echo may occur depending on the acoustic performance of themobile phone. If you use AEC, no echoes should be audible (if you hear echoes, however, changing the delay value may help).

5. Make data calls.

Expected outcome

Satellite delay will increase the system Round Trip Times.

Throughput will be lower compared to terrestrial Abis configuration.





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3 Deactivating and testing Satellite AbisSteps

1. Deactivate Satellite Abis.

In order to deactivate GPRS or EGPRS in satellite Abis, set back the

parameter values that were changed in step 10 Modify (E)GPRS related parameters in section Activating Satellite Abis.

Turn off the PRFILE parameter SATELL_ABIS_IN_USE.

ZWOC:10,31,0;

2. Set the AEC delay value in the TCSM.

ZRU: ALL:DELAY=0

P le as e, c o nf ir m ( Y/ N) YDo you wan t conf igu rat ion changes to bepe rmanen t by saving them in f l ash memory?P le as e a ns we r ( Y/ N) Y

Further information

Typically no other parameters need to be changed.

The Satellite Abis build in the BTS operates normally with the normalterrestrial Abis interface in the BSC.

3. Switch on the transcoder TRU.

ZRS:ALL=ON;

4. Test the deactivation.

A decrease in call set-up delay and speech delay indicates that SatelliteAbis has been deactivated.



Deactivating and testing Satellite Abis


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activating and testing satellite abis

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