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ITU-T Q.2984 (12/1999)

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Broadband integrated services digital network (B-ISDN) and broadband private integrated services network (B-PISN) – Prenegotiation
This Recommendation specifies the signalling protocol for the purpose of prenegotiation at the QB, SB, TB and co-incident SB/TB reference points within, between and at the access to Broadband Private Integrated Services Networks and within, between and at the access to public Broadband Integrated Services Digital Networks. The protocol operates between two adjacent call control entities. The protocol is applicable in a separated call and bearer (connection) control environment for the support of calls having none, one or multiple bearers.The purpose of prenegotiation is to allow a user to check compatibility and availability at the remote user with regard to one or more connections the user intends to establish during the lifetime of the call, without reserving connection-oriented resources in the network.
Citation: https://handle.itu.int/11.1002/1000/4829
Series title: Q series: Switching and signalling, and associated measurements and tests
  Q.2000-Q.2999: Broadband ISDN
  Q.2900-Q.2999: B-ISDN application protocols for access signalling
Approval date: 1999-12-03
Approval process:TAP
Status: In force
Maintenance responsibility: ITU-T Study Group 11
Further details: Patent statement(s)