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EP0388034A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Telephone systems

Assignee: Libera Telecom Ltd
•
Filing: 1990-02-23
•
Granted: —
•
Expires: 2010-02-23
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Abstract

Abstract A telephone system comprises a plurality of base stations (26, 30) all connected to a public switched telephone network (PSTN) and a plurality of groups of handsets (12, 34). Each group of handsets (12, 34) is associated with a corresponding one of the base stations (26, 30) by virtue of each base station being equipped to identify and receive a call from the PSTN for any handset of the corresponding group. The handsets of a particular group communicate by means of a radio link with the corresponding base station, thereby avoiding the need for any hard wiring between the base stations (26, 30) and the handsets (12, 34).

Inventors

  • 👤 Timothy J. Buisseret
  • 👤 John R. Pickin

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-26 18:21
CPC Classifications
H; H04; H04W; H04W84/00; H04W84/02; H04W84/10; H04W84/16; H04M; H04M1/00; H04M1/72; H04M1/725; H04M1/733

Claims Analysis

Total Claims: 5
Claim 1
Independent Claim 94 words
A telephone system comprising a plurality of base stations all connected to a public switched telephone network (PSTN), a plurality of groups of handsets, with each handset being identified by a telephone number accorded to the handset by the PSTN operator, each group of handsets being associated with a corresponding one of the base stations by virtue of each base station being equipped to identify and receive a call from the PSTN for any handset of the corresponding group, and each handset being capable of establishing a radio link with the corresponding base station.
Claim 2
Dependent Claim 94 words
A telephone system comprising a plurality of base stations all connected to a public switched telephone network (PSTN), a plurality of groups of handsets, with each handset being identified by a telephone number accorded to the handset by the PSTN operator, each group of handsets being associated with a corresponding one of the base stations by virtue of each base station being equipped to identify and receive a call from the PSTN for any handset of the corresponding group, and each handset being capable of establishing a radio link with the corresponding base station.
Claim 3
Dependent Claim 36 words
A telephone system according to claim 1, wherein each base station is linked by wiring to the PSTN, the wiring to each base station providing fewer lines than the number of handsets in the corresponding group.
Claim 4
Dependent Claim 24 words
A telephone system according to claim 1 or 2, wherein at least certain of the handsets are portable handsets of a cordless telephone system.
Claim 5
Dependent Claim 25 words
A telephone system according to claim 3, wherein the handsets are capable of making outgoing calls through base stations other than the corresponding base station.

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