ITU-T Q.761-1989
Functional Description of the ISDN User Part of Signalling System No. 7 - Specifications of Signalling System No. 7 (Study Group XI) 4 pp

Standard-Nr.

ITU-T Q.761-1989

Erscheinungsdatum

1989

Organisation

ITU-T - International Telecommunication Union/ITU Telcommunication Sector