Restricted access telephones for logical telephone networks

Details Restricted access telephones for logical telephone networks Restricted access telephones for logical telephone networks

1996-07-24

1998-04-28

Zele, Krista

Telephonic communications

Call or terminal access alarm or control

At substation

379188, 379219, 379387, 455410, 455411, H04M 166

Patent

active

057455597

ABSTRACT:
A logical network is defined by a plurality of restricted class telephones in which such telephones incorporate a network access code characterizing the logical network. Each telephone contains a verification device that allows each telephone of such logical network to verify that others of such telephones are members of that logical network by transmission and receipt of a network access code. The logical network is useable on any telephone system, including public telephone service networks, cellular telephone systems and radio telephone systems. The verification device may be installed as a retroactive addition to the standard components found within existing cellular telephones or may be included as part of the technical design in new cellular telephones.

REFERENCES:
patent: 4601011 (1986-07-01), Grynberg
patent: 4974253 (1990-11-01), Hashimoto
patent: 5022067 (1991-06-01), Hughes
patent: 5200995 (1993-04-01), Gaukel et al.
patent: 5239294 (1993-08-01), Flanders et al.
patent: 5241595 (1993-08-01), Kuno
patent: 5337345 (1994-08-01), Cassidy et al.
patent: 5386468 (1995-01-01), Akiyama et al.
patent: 5448760 (1995-09-01), Frederick
patent: 5452346 (1995-09-01), Miyamoto
patent: 5455863 (1995-10-01), Brown et al.
patent: 5613215 (1997-03-01), Grube et al.
patent: 5625869 (1997-04-01), Nagamatsu et al.
patent: 5642401 (1997-06-01), Yahagi
patent: 5666405 (1997-09-01), Weber

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