09.123GPPApplication of ISDN User Part (ISUP) Version 2 for the Integrated Services Digital Network (ISDN) - Public Land Mobile Network (PLMN) signalling interfacePart 1: Protocol specificationTS
Teleservices could be identified on the ISDN-PLMN interface in the User Teleservice Information parameter. High Layer Compatibility (HLC) information elements are passed transparently in the access transport parameter. Support of teleservices is an end-to-end aspect. However, the relationship between some ISDN teleservices and GSM teleservices are listed for information.
Table A.1: Relationship between ISDN teleservices and GSM teleservices
Telephony, Emergency call
Facsimile Group 2/3
Automatic facsimile group 3
Facsimile Group 4 Class 1
Alternate speech and facsimile group 3
SMS, Point-To-Point, Mobile Originated
SMS, Point-To-Point, Mobile Terminated
SMS Cell Broadcast
Message Handler System
Annex B (informative): Considerations on bearer services
The mapping between parameters in the GSM call set up request message and the ISDN call set up request message is described in ETS 300 601 to ETS 300 604 ( to ).
Annex C (informative): Mapping of parameters between ISUP and MAP
Mapping of parameters between ISUP and MAP will take place for Mobile terminating calls where the MSC (acting as gateway MSC) has to interrogate the home location register in order to obtain routing information (the HLR needs to retrieve the routing information from the VLR).