System and method for muting and unmuting a communication device

Details System and method for muting and unmuting a communication device System and method for muting and unmuting a communication device

1991-07-15

1995-02-14

Urban, Edward F.

Telecommunications

Transmitter and receiver at separate stations

Single message via plural carrier wave transmission

455 70, 4551941, 455297, H04B 700

Patent

active

053903412

ABSTRACT:
A system (200) for muting a portable radio (104) includes a mobile radio (106) having a mute switch (108). Upon activating the mute switch (108), a signalling message is generated (ISW) by radio (106) that is in turn transmitted to the system central controller (202). The system central controller (202) then sends a mute signalling message (OSW) directed to portable radio (104). Upon decoding the signalling message, portable radio (104) is placed in a muted condition, thereby preventing the device from unmuting. Portable radio (104) can become automatically unmuted by either the pressing of the PTT switch found on radio (104) or by the radio user opening the door (116) of his vehicle (102).

REFERENCES:
patent: 4414687 (1983-11-01), Hirata
patent: 4517561 (1985-05-01), Burke et al.
patent: 4543665 (1985-09-01), Sotelo et al.
patent: 4554677 (1985-11-01), Smith et al.
patent: 4627107 (1986-12-01), Hohlfeld et al.
patent: 4663765 (1987-05-01), Sutphin et al.

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