ITU-T Q.931-1998
ISDN user-network interface layer 3 specification for basic call control Study Group 11

Standard No.

ITU-T Q.931-1998

Release Date

1998

Published By

International Telecommunication Union (ITU)

Latest

ITU-T Q.931-1998

Scope

This Recommendation specifies the procedures for the establishing, maintaining and clearing of network connections at the ISDN user-network interface. These procedures are defined in terms of messages exchanged over the D-channel of basic and primary rate

ITU-T Q.931-1998 history

• 1998 ITU-T Q.931-1998 ISDN user-network interface layer 3 specification for basic call control Study Group 11
• 1993 ITU-T Q.931-1993 (WITHDRAWN) Digital Subscriber Signalling System No. 1 (DSS 1) - ISDN User-Network Interface Layer 3 Specification for Basic Call Control - Digital Subscriber Signalling System No. 1 Network Layer Study Group XI; 323 pp; ETSI PRETS 300 403-1