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ITU-T Q.931
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ITU-T Q.931
ISDN user-network interface layer 3 specification for basic call controlMore info
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 interface structures. The functions and procedures of this protocol, and the relationship with other layers, are described in general terms in Recommendation Q.930/I.450 [1]. Annex M contains the additional basic call signalling requirement for the support of private network interconnection for VPN applications.
| Author | ITU |
|---|---|
| Editor | ITU |
| Document type | Standard |
| Format | File |
| ICS | 33.080 : Integrated Services Digital Network (ISDN)
35.100.30 : Network layer |
| Number of pages | 342 |
| Replace | ITU-T Q.931 (1993-03) |
| Modified by | ITU-T Q.931 AMD 1 (2002-12)
ITU-T Q.931 Erratum 1 (2003-02) |
| Year | 1990 |
| Document history | ITU-T Q.931 (1998-05) |
| Country | Switzerland |
| Keyword | CCITT Q.931;ITU-T 931;931;ITU-T Q.931 |