ITU-T Q.931
ISDN user-network interface layer 3 specification for basic call control
active, Most Current
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| Organization: | ITU-T |
| Publication Date: | 14 February 2003 |
| Status: | active |
| Page Count: | 2 |
scope:
Scope of this Recommendation
The procedures currently described in this Recommendation are for the control of circuit-switched connections, user-to-user signalling connections and packet-switched connections. The transport of other message-based information flows on the D-channel is a subject for further study and will be included in related Recommendations.
NOTE 1 - The term "layer 3" is used for the functions and protocol described in this Recommendation (see Recommendation Q.930/I.450). The terms "data link layer" and "layer 2" are used interchangeably to refer to the layer immediately below layer 3.
NOTE 2 - Alignment of the functions and protocol with those of OSI network layer is for further study.
Document History
December 1, 2023
(Pre-Published) ISDN user-network interface layer 3 specification for basic call control Amendment 2 – Extensions for the support for the calling line identification authentication
The amendment was produced to meet the need for the implementation of the calling line identification authentication. This amendment contains the modifications to Recommendation ITU-T Q.931 (1999) in...
ITU-T Q.931
February 14, 2003
ISDN user-network interface layer 3 specification for basic call control
Scope of this Recommendation
The procedures currently described in this Recommendation are for the control of circuit-switched connections, user-to-user signalling connections and packet-switched...
December 1, 2002
ISDN user-network interface layer 3 specification for basic call control SERIES Q: SWITCHING AND SIGNALLING Digital subscriber Signalling System No. 1 – Network layer
A description is not available for this item.
May 1, 1998
ISDN user-network interface layer 3 specification for basic call control
Scope of this Recommendation
The procedures currently described in this Recommendation are for the control of circuit-switched connections, user-to-user signalling connections and packet-switched...
January 1, 1993
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
A description is not available for this item.
January 1, 1989
ISDN User-Network Interface Layer 3 Specification for Basic Call Control - Digital Subscriber Signalling System No. 1 (DSS 1), Network Layer, User-Network Management
A description is not available for this item.