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Cellular extension of a fixed communications network

  • US 5,924,030 A
  • Filed: 09/11/1996
  • Issued: 07/13/1999
  • Est. Priority Date: 09/29/1995
  • Status: Expired due to Term
First Claim
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1. A communications system comprising:

  • a fixed communications network (1),a regular cellular network (2) with a connection (3) to said fixed communications network (1) said regular cellular network comprising a first radio interface (15) for mobile communication devices (9) and first subscriber data base means (7) for connecting the mobile station number (MSISDN) of the subscriber (MS) of the regular cellular network with the corresponding mobile subscriber identity code (IMSI) and for storing the information concerning the location of the subscriber in the cellular system (2) or, in case the subscriber has left the cellular system, for storing the call forwarding information, in order to forward the call to said subscriber (MS), anda cellular extension (4) connected to the fixed communications network (1), said cellular extension (4) having in the fixed network (1) one or several call forwarding numbers (ISDN), whereby all incoming calls to the cellular extension (4) are forwarded through the fixed communications network (1) to one of said connection identification numbers (ISDN) of the cellular extension, characterized in that said cellular extension (4) comprisesa second radio interface (16) compatible with said first radio interface (15), so that one and the same mobile communication device (9) can be used both in the regular cellular system (2) and in the cellular extension (4) of the fixed communications network (1), andsecond subscriber database means (11) for connecting the mobile subscriber identity code (IMSI) of the regular cellular network subscriber (MS) located in said cellular extension with one of said connection identification numbers (ISDN) of the cellular extension (4) in order to forward the calls to said subscriber (MS).

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