SGSN Commands Global Title Translation
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Transcript of SGSN Commands Global Title Translation
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8/11/2019 SGSN Commands Global Title Translation
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Global Title Translation (GTT) is a function usually performed in a Signal TransferPoint (STP). GTT is the procedure by which the destination signaling point andthe subsystem number (SSN) is determined from digits (that is, the global title)present in the signaling message.
There are 3 type of numbering plan :
i. E.164 That is MSISDN
ii. E.212 That is IMSI
iii. E.214 That is Mobile Global Title (MGT)
Lets say IMSI is 470070020071316
Here 470 is MCC & 07 is MNC.
Findout the IMSI detail from SGSN:
=== root@eqm01s14p2 ANCB ~ # gsh get_imsins 47007
IMSI Number Series : 47007
Roaming Status : Home
Default APN Operator Id : mnc007.mcc470.gprs
Numbering Plan : E.214
Nature of Address : International
No of Digits to Remove : 5
Digits to Add : 88016
Miscellaneous 1 :
Miscellaneous 2 :
Miscellaneous 3 :
Allow Camel Phase 3 : false
QoS PolicyMap WCDMA : 2
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QoS PolicyMap GSM : 1
According to above IMSI series we need to remove first 5 digits & add 88016 from
subscriber IMSI. Lets Say:
IMSI is 470070020071316
Inorder to find MGT we need to remove first 5 digits from IMSI and add 88016 asprefix. Then it becomes
880160020071316. This is called Mobile Global Title (MGT).
Now we have to find out the SCCP GT tule.
gsh list_ss7_sccp_gtrule
Above command will give the available GT rules in SGSN.
A ss7_sccp_gtrule -rn GT_E214_Warid_8801600 -tnGTTrans_E214
A ss7_sccp_gtrule -rn GT_E214_Warid_8801601 -tnGTTrans_E214
A ss7_sccp_gtrule -rn GT_E214_Warid_8801602 -tnGTTrans_E214
A ss7_sccp_gtrule -rn GT_E214_Warid_8801603 -tnGTTrans_E214
A ss7_sccp_gtrule -rn GT_E214_Warid_88016040 -tnGTTrans_E214
A ss7_sccp_gtrule -rn GT_E214_Warid_88016041 -tn
GTTrans_E214
Now we have to search the longest match with MGT.
In this case it matchs with
A ss7_sccp_gtrule -rn GT_E214_Warid_8801600 -tnGTTrans_E214
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To see what the rule is:
gsh get_ss7_sccp_gtrule -rn GT_E214_Warid_8801600 -tnGTTrans_E214
Output like:
Parameter Active Data Planned Data
timestamp 20071119030838 _
planState _ _
addr 8801600* _
ti 1 _
en ES_HLR01_HLR02_SSN6 _
To see what the Entity is:
gsh get_ss7_sccp_entityset_remote -en ES_HLR01_HLR02_SSN6
Output is like:
Parameter Active Data Planned Data
timestamp 20070414095029 _
planState _ _
lsi 0 _
pdpc 3001 _
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popc 5001 _
pssn 6 _
sdpc 3002 _
sopc 5001 _
sssn 6 _
Here DPC is OPC is 5001 that is SGSN and DPC is 3001 that is HLR, our finaldestination.To check all routsets:gsh list_ss7_mtpl3_routesetTo check all routes in all routesetsgsh list_ss7_mtpl3_altroute
To check a single route:gsh get_ss7_mtpl3_altroute -opc 5001 -dpc 3001 -lsid 1To check avabile linksets:gsh list_ss7_mtpl3_linksetTo check a single linkset:gsh get_ss7_mtpl3_linkset -opc 5001 -lsid 1To check every link for all linkset:gsh list_ss7_mtpl3_link_nbTo check hardware equipment & time slot of a link:gsh get_ss7_mtpl3_link_nb -opc 5001 -lsid 1 -slc 0Output:
Parameter Active Data Planned Datatimestamp 20061208142732 _planState _ _eqp 1.3 _trunk A _ts 1 _
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