The SGSN sends Location Update Request (BSSAP+LOCATION-UPDATE-REQUEST) over the Gs interface but does not receive a Location Update Accept (BSSAP+LOCATION_AREA_UPDATE_ACCEPT) from some MSC/VLRs as the SGSN includes the Originating Point Code (OPC) in the SCCP calling-party-address IE when the routing-indicator is set to 'ROUTE on GT'. The MSC/VLRs are unable to perform GT-based routing due to the presence of OPC in the calling-party-address generated by SGSN. The OPC has to be excluded from the SGSN generated SCCP Calling Party Address towards MSC/VLR on Gs interface. The OPC is not relevant in the SCCP Calling Party Address when routing indicator is set to "Route on GT". A new CLI-based control is introduced for the operators on Gs-service to include or exclude the OPC in the SCCP calling-party-address if the routing indicator is 'Route on gt'. By default the SGSN includes the OPC in SCCP calling party address when the routing-indicator is set to 'ROUTE on GT'. The operational benefit of this feature is that the MSCs/VLRs can perform GT-based routing easily. This feature is compliant with ITU Q.714 standard.

This section describes how the operator can choose to include or exclude OPC in the SGSN-generated SCCP calling-party-address if the routing indicator is 'Route on GT'.

config 
   context context_name 
      gs-service gs_srvc_name 
            vlr vlr_name isdn-number E164_num [exclude-opc-in-sccp] {point-code pt_code  
            | bssap+ ssn ssn [exclude-opc-in-sccp] [point-code pt_code]} 
            exit 

Notes:

• The vlr command is used to define the configuration of the VLR used in the GS Service. A new keyword exclude-opc-in-sccp is introduced in the vlr command under the GS Service Configuration Mode. The operator can configure this command to exclude or include OPC in the SGSN-generated SCCP calling-party-address for "route-on-gt".

• By default this keyword is not enabled and the OPC is included in the SCCP calling party address for “route-on-gt”.

Execute the following command to verify the configuration of this feature.

show gs-service service-name 

The new counter OPC in SCCPCallingParty Address is introduced which indicates if the vlr command is configured to either include or exclude OPC in the SCCP Calling Party Address if the routing indicator is 'Route on GT'.

• OPC in SCCPCallingParty Address: Included/Excluded