ETSI - EN 302 091-1
Broadband Integrated Services Digital Network (B-ISDN) and Broadband Private Integrated Services Network (B-PISN); Digital Subscriber Signalling System No.2 (DSS2), Broadband Inter-Exchange Signalling (B-QSIG), and Signalling System No.7 (SS7); Prenegotiation; Part 1: Protocol Specification
|Publication Date:||1 December 1998|
The present document 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 European 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 protocol
is applicable to a two-party call or a multi-party call. However,
prenegotiation is performed between two parties. In case of
multi-party connections (point-to-multipoint
The QB reference point is defined in ISO/IEC 11579-1 . The SB and TB reference points are defined in ITU-T Recommendation I.327 .
The present document is based on the transport capabilities as defined in ETS 300 796-1  and ECMA-254 , and is closely related to the call control protocol specification as defined in EN 302 092-1 .
The purpose of prenegotiation as specified in the present document 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. Reservation of connection-oriented resources at the remote user is outside the scope of the present document.