GSM 09.02 - Version 5.3.0 - Digital cellular telecommunications - ETSI

Page 110
GSM 09.02 version 5.3.0: August 1996
8 Call handling services
8.1 MAP_SEND_INFO_FOR_INCOMING_CALL service
8.1.1 Definition
This service is used between an MSC and VLR. It is invoked by an MSC receiving an incoming call (call to
MS) to request the VLR for information to proceed and set up the call.
This is a confirmed service using the primitives described in table 8.1/1.
8.1.2 Service primitives
Parameter name Request Indication Response Confirm
Invoke ID M M(=) M(=) M(=)
MSRN M C(=)
Bearer Service C C(=)
Tele Service C C(=)
Dialled Number C C(=)
CUG Interlock C C(=) U C(=)
CUG Outgoing Access C C(=) C C(=)
Number of Forwarding C C(=)
Incoming Call Setup Result C C(=)
Forwarding Data C C(=)
MSISDN U C(=)
User error C C(=)
Provider error O
8.1.3 Parameter use
Table 8.1/1: MAP_SEND_INFO_FOR_INCOMING_CALL parameters
See subclause 5.6 for a definition of the parameters used, in addition to the following.
MSRN
This is the Mobile Subscriber Roaming Number. It is the identity of the MS to receive the incoming call.
Bearer Service
If this information is present in the User Service Information element of the ISUP Initial Address Message,
it will be passed on to the VLR without change. Note, either a Bearer Service or Tele Service will be
provided, not both.
Tele Service
If this information is present in the User Service Information element of the ISUP Initial Address Message it
will be passed on to the VLR without change.
Dialled Number
If the information is available, this is the number originally dialled by the calling subscriber.
CUG Interlock
This parameter will only be present in the request and indication if the CUG information is received from
ISUP. This parameter will only be present in the response and confirm, if the Incoming Call Setup Result
indicates forward and the call is to be treated as a CUG Call, following the CUG Call Authorization check in
the VLR.