ITU-T Q.721 FRENCH-1988
FUNCTIONAL DESCRIPTION OF THE SIGNALLING SYSTEM No. 7 TELEPHONE USER PART (TUP)

Standard No.

ITU-T Q.721 FRENCH-1988

Release Date

1988

Published By

International Telecommunication Union (ITU)

Latest

ITU-T Q.721 FRENCH-1988

Scope

A general description of the signalling system and the division of functions between the Message Transfer Part and the Telephone User Part are presented in Recommendation Q.700 and the requirements of interaction between those two parts are contained in Recommendation Q.701.

ITU-T Q.721 FRENCH-1988 history

• 1988 ITU-T Q.721 FRENCH-1988 FUNCTIONAL DESCRIPTION OF THE SIGNALLING SYSTEM No. 7 TELEPHONE USER PART (TUP)