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ETSI - EN 300 058-1

Integrated Services Digital Network (ISDN); Call Waiting (CW) Supplementary Service; Digital Subscriber Signalling System No.One (DSS1) Protocol; Part 1: Protocol Specification

inactive
Organization: ETSI
Publication Date: 1 February 1998
Status: inactive
Page Count: 17
scope:

This first part of EN 300 058 specifies the stage three of the Call Waiting (CW) supplementary service for the Pan- European Integrated Services Digital Network (ISDN) as provided by European public telecommunications operators at the T reference point or coincident S and T reference point (as defined in CCITT Recommendation I.411 [1]) by means of the Digital Subscriber Signalling System No. one (DSS1). Stage 3 identifies the protocol procedures and switching functions needed to support a telecommunications service (see CCITT Recommendation I.130 [2]).

In addition the present document specifies the protocol requirements at the T reference point where the service is provided to the user via a private ISDN.

The present document does not specify the additional protocol requirements where the service is provided to the user via a telecommunications network that is not an ISDN.

The CW supplementary service permits a user to be informed of an incoming call (as per basic call procedures) with an indication that no interface information channel is available. The user has then the choice of accepting, rejecting or ignoring the waiting call (as per basic call procedures).

The CW supplementary service is considered meaningful when applied to the telephony teleservice and the speech and 3,1 kHz audio bearer services. Furthermore, it can be applied to other circuit-switched services.

Further parts of the present document specify the method of testing required to identify conformance to the present document.

The present document is applicable to equipment supporting the CW supplementary service, to be attached at either side of a T reference point or coincident S and T reference point when used as an access to the public ISDN.

Document History

June 1, 1998
Integrated Services Digital Network (ISDN); Call Waiting (CW) Supplementary Service; Digital Subscriber Signalling System No.One (DSS1) Protocol; Part 1: Protocol Specification
A description is not available for this item.
EN 300 058-1
February 1, 1998
Integrated Services Digital Network (ISDN); Call Waiting (CW) Supplementary Service; Digital Subscriber Signalling System No.One (DSS1) Protocol; Part 1: Protocol Specification
This first part of EN 300 058 specifies the stage three of the Call Waiting (CW) supplementary service for the Pan- European Integrated Services Digital Network (ISDN) as provided by European public...
January 1, 1991
Integrated Services Digital Network (ISDN); Call Waiting (CW) Supplementary Service Digital Subscriber Signalling System No. One (DSS1) Protocol Part 1: Protocol Specification
This first part of ETS 300 058 specifies the stage three of the Call Waiting (CW) supplementary service for the Pan-European Integrated Services Digital Network (ISDN) as provided by European public...

References

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