ETSI - EN 300 121
Integrated Services Digital Network (ISDN); Application of the ISDN User Part (ISUP) of ITU-T Signalling System No.7 (SS7) for International ISDN interconnections
| Organization: | ETSI |
| Publication Date: | 1 February 2003 |
| Status: | inactive |
| Page Count: | 6 |
scope:
The present document specifies the signalling protocol and switching aspects of the International Emergency Preference Scheme (IEPS) service for the pan-European Integrated Services Digital Network (ISDN) as provided by the European public telecommunications operators by means of the Signalling SystemNo.7 (SS7) protocol for the ISDN User Part (ISUP).
The present document does not speciSl the additional protocol requirements where the service is provided to the user via a telecommunications network that is not an ISDN.
The present document does not speciSl the additional protocol requirements for the national signalling interface.
NOTE: If the implementation of a signalling system in a national network conflicts with measures described here the international gateway of the network is expected to provide the interworking between the two.
The present document applies only to the international interconnection.
The IEPS service provides the calling party with preferential treatment during call and connection setup.
The IEPS service is applicable to all international circuit switched telecommunication services.
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