Patent Number: 6,298,043

Title: Communication system architecture and a connection verification mechanism therefor

Abstract: A communication system typically comprises a number of interconnected broadband-narrowband interfaces (304, 402-404) that together interact to provide a communication resource (400) that can support a call across the system At a time when the communication resource (or a portion thereof) is apparently in place, a terminating node of a broadband-narrowband interface sends a verify-request message (452) backwards across the communication resource. A connection broker (322), coupled to both ends of the communication resource in a particular broadband-narrowband interface (404), is aware of the issuance of the verify-request message, and is therefore able to assess and report, principally, on path connectivity of the communication resource (either within the broadband-narrowband interface or between adjacent interfaces). More particularly, the connection broker expects the arrival of a path connectivity message (454, 460) issued from an end of the broadband-narrowband network responsive to the verify-request message and, as such, can provide an appropriate report (458, 470, 480) upon the timely receipt, or not, of the path connectivity message. Indeed, the verify-request message may also function to confirm path continuity.

Inventors: Mauger; Roy Harold (Hertfordshire, GB), Cable; Julian Frank Barry (Herts, GB), Brueckheimer; Simon Daniel (London, GB)

Assignee: Nortel Networks Limited

International Classification: H04L 12/56 (20060101); H04J 001/16 ()

Expiration Date: 10/02/2018