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Wide area cordless telephone system having means for avoiding double registrations

  • US 4,879,740 A
  • Filed: 04/04/1988
  • Issued: 11/07/1989
  • Est. Priority Date: 04/03/1987
  • Status: Expired due to Term
First Claim
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1. A wide area cordless telephone system covering a service area which is divided into a plurality of local areas, comprising:

  • a plurality of home position portable cordless telephone provided in each one of said local areas, each of said home position cordless telephones having a corresponding line terminal in a telephone switching system and multi-channel access means for establishing a two-way radio link, transmitting a registration request through the established link upon entry of a manual command and subsequently transmitting an acknowledgement upon receipt of a response identifying a local area, said request identifying the cordless telephone which transmitted the request;

    a plurality of access units provided in said one local area for establishing said radio links with said home position cordless telephones and non-home position cordless telephones belonging to another level area; and

    a pre-dialing switching stage provided in said one local area for establishing a connection between said access units and line terminals of said telephone switching stage including control means connected to said access units for receiving said request and acknowledgement therethrough, transmitting a response identifying the local area of said pre-dialing switching stage through one of said access units on receiving a registration request and assigning a reserved line terminal of said telephone switching system to a non-home position cordless telephone if the same is identified by the received request, and making registration of a cordless telephone on receiving an acknowledgement identifying the same local area as identified by said transmitted response.

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