SIP: Session Initiation Protocol
...Category Archives: Quellenverweise
EN 300 403-1
European Standard (Telecommunications series)…
ITU-T Recommendation Q.9
Vocabulary of Switching and Signalling Terms
ITU-T Recommendation Q.850
Digital subscriber Signalling System No. 1 – General
Usage of cause and location in the Digital Subscriber Signalling System No. 1
and the Signalling System No. 7 ISDN User Part
ITU-T Q.931
ISDN user-network interface layer 3 specification for basic call control