ITU-T Q.522-1989
Digital Exchange Connections, Signalling and Ancillary Functions - Digital Local, Transit, Combined and International Exchanges in Integrated Digital Networks and Mixed Analogue-Digital Networks - Supplements (Study Group XI) 16 pp

Standard No.

ITU-T Q.522-1989

Release Date

1989

Published By

International Telecommunication Union (ITU)

Status

Withdraw

Latest

ITU-T Q.522-1989

Scope

This Recommendation applies to digital local, combined, transit and international exchanges for telephony in Integrated Digital Networks (IDN) and also to local, combined, transit, and international exchanges in an Integrated Services Digital Network (ISD

ITU-T Q.522-1989 history

• 1989 ITU-T Q.522-1989 Digital Exchange Connections, Signalling and Ancillary Functions - Digital Local, Transit, Combined and International Exchanges in Integrated Digital Networks and Mixed Analogue-Digital Networks - Supplements (Study Group XI) 16 pp