BELL INDUSTRY ADVISORY

Derived Channel Service

Bell Canada announces the planned commercial introduction of the Terminal-to-Network interface for a Derived Channel application. Service is expected to commence by IVQ97 in selected areas of Quebec and Ontario. A trial is to be launched during the month of September, 1997.

This service will use existing telephone loops having metallic continuity, to provide simultaneous voice and data under voice capability between the subscriber and the serving central office. The terminal equipment associated with the Derived Channel will be provided by the service provider at both the subscriber and central office ends of the loop. The connection to the Class 5 switch is a normal two wire, POTS interface. Both the central office and subscriber located Derived Channel equipment must be certified in accordance with Certification Specification CS-03.

Compatibility Impact:

None expected.

Documentation:

None required.

For further information on the service, please contact: