A.1 Relation between ISDN teleservices and GSM teleservices

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

ISDN teleservices

GSM teleservices

Telephony

Telephony, Emergency call

Facsimile Group 2/3

Automatic facsimile group 3

Facsimile Group 4 Class 1

Not used

Teletex

Not used

Not used

Alternate speech and facsimile group 3

Not used

SMS, Point-To-Point, Mobile Originated

Not used

SMS, Point-To-Point, Mobile Terminated

Not used

SMS Cell Broadcast

Videotex

Not used

Telex

Not used

Message Handler System

Not used

Videotelephony

Not used

Videoconferencing

Not used

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 ([31] to [34]).

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).