ITU-T Q.953.1-1992
STAGE 3 DESCRIPTION FOR CALL COMPLETION SUPPLEMENTARY SERVICES USING DSS 1 SECTION 1 - CALL WAITING

Standard No.

ITU-T Q.953.1-1992

Release Date

1992

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.953.1-1992

Scope

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

ITU-T Q.953.1-1992 Referenced Document

• ITU-T Q.953 Integrated Services Digital Network (ISDN) - Stage 3 Description for Call Completion Supplementary Services Using DSS 1 Clause 4 - Terminal Portability (TP) - Digital Subscriber Signalling System No. 1 (Study Group 11) 11 pp*， 1995-01-01 Update

ITU-T Q.953.1-1992 history

• 1992 ITU-T Q.953.1-1992 STAGE 3 DESCRIPTION FOR CALL COMPLETION SUPPLEMENTARY SERVICES USING DSS 1 SECTION 1 - CALL WAITING