Abstract
This paper evaluates the possibility of extending the Release 1 Broadband Integrated Services Digital Network (BISDN) User-Network Interface (UNI) signaling protocol, called Q.93B, to support services in a Release 2 BISDN. Two Q.93B-based protocols are considered: a monolithic protocol and separated protocol. The resulting protocols are compared to a set of modular protocols referred to as the Distributed Call Processing Architecture and Protocols (DCPA+P). While the Q.93B-based approaches may be backward compatible with existing signaling protocols, their limited structure greatly reduces their flexibility. The DCPA+P also meets the functional objectives of Release 2 BISDN, while providing a flexible platform for rapidly introducing new services.
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