ITU-T Q.722-1988
GENERAL FUNCTION OF TELEPHONE MESSAGES AND SIGNALS

Standard No.

ITU-T Q.722-1988

Release Date

1988

Published By

International Telecommunication Union (ITU)

Latest

ITU-T Q.722-1988

Scope

This Recommendation describes the general function of telephone signalling messages and the telephone signals and other information components contained in those messages. The requirements relating to the use of the signalling messages and their signal co

ITU-T Q.722-1988 history

• 1988 ITU-T Q.722-1988 GENERAL FUNCTION OF TELEPHONE MESSAGES AND SIGNALS