ITU-T Q.522 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

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ITU-T Q.522 Document Information:

Title
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

International Telecommunication Union/ITU Telcommunication Sector

Publication Date:
Jan 1, 1989

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