Telecommunications – Carrier wave repeater or relay system
Patent
1981-04-14
1983-10-11
Safourek, Benedict V.
Telecommunications
Carrier wave repeater or relay system
455 32, 455 35, 455 54, 179 2EB, H04Q 702, H04B 726
Patent
active
044096879
ABSTRACT:
Communication between a first radio transmitter and receiver and a second radio transmitter and receiver is provided by a system repeater. An arrangement for each radio transmitter and receiver in the system establishes communication on a radio frequency channel selected from a plurality of such channels. When an arrangement is in an idle or receive mode, it causes the associated receiver to search the channels for a predetermined group tone or tones assigned to each receiver. When the predetermined group tone or tones are received on a channel, the arrangement enables the associated transmitter and receiver on that channel. When an arrangement is in a call originate or transmit mode, it causes the associated receiver to search for an idle or unused channel. When an idle channel is found, the arrangement enables the associated transmitter and receiver on that channel, and causes the transmitter to transmit a busy tone and the predetermined group tone or tones so as to enable the other transmitters and receivers of the predetermined group on that same channel.
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IMTS System Description-LBI-8758A-General Electric Co.
The Basics of Trunked Mobile Radio by Rybicki et al., Bernard Johnson, Inc.--Mobile Times--October 1980, pp. 24-27.
Berti John C.
Williams James W.
General Electric Company
Safourek Benedict V.
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