Communications systems

Details Communications systems Communications systems

H - Electricity

04

J

363/10

H04J 3/00 (2006.01) H04M 1/733 (2006.01) H04Q 7/24 (2006.01)

Patent

CA 2012368

ABSTRACT: - Communications Systems The telecommunications system comprises a plurality of distributed base stations each operatively coupled to a public switched telecommunications network and being adapted to co- operate with one or more of a plurality of portable cordless telephone units by way of a plurality of cordless digital communication channels operating on a time division duplex basis. The base unit is arranged upon detection of an incoming public switched network call, to poll all; the portable cordless telephone units by transmitting on a repetitious basis the identity of the portable units to be connected to the incoming call on a selected channel and the base unit is arranged to intersperse each poll operation with a signalling message. Each portable unit is arranged to scan the cordless channels at a predetermined interval and the base unit is adapted to postpone the sending of a ringing message to any of the portable units until a predetermined period has elapsed since the commencement of the polling action, the predetermined period being substantially similar to but larger than the predetermined interval.

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