ITU-T's internodal broadband signalling protocol

Broadband integrated services user part (B-ISUP) is an internodal signalling protocol defined by the International Telecommunications Union (ITU-T). Ifs purpose is to establish, maintain and release asynchronous transfer mode (ATM) connections in a public network, via the use of signalling messages. The initial release of B-ISUP was in February 1995, known as capability set I (CS-I). Since then, continued progress has been made extending the capabilities of B-ISUP with the development of CS-2. This paper provides an overview of the B-ISUP signalling protocol capabilities and describes its impact on the traditional Signalling System No 7 (SS7) architecture.