Trunking method and apparatus for establishing communication...

Details Trunking method and apparatus for establishing communication... Trunking method and apparatus for establishing communication...

H - Electricity

04

B

H04B 1/00 (2006.01) H04B 7/26 (2006.01) H04Q 7/28 (2006.01) H04Q 7/38 (2006.01)

Patent

CA 2055459

An arrangement (10) of a mobile station and a method for establishing communication between at least two of such sta- tions are disclosed. The arrangement includes a transmitter (11), a subaudible tone generator (15), a receiver (12), a subaudible tone decoder (16), and a control circuit (14). When in a receive mode, the arrangement (10) causes the receiver (12) to search a carrier signal and a subaudible-tone signal on the plurality of channels. When these signals are found, the transmitter (11) is en- abled. When in a transmit mode, the arrangement (10) causes the receiver (12) to search for an idle channel. When an idle chan- nel is found, the arrangement causes the transmitter (11) to transmit a carrier signal and a subaudible tone signal, and waits for a reply from the repeater. Upon receiving the reply, the arrangement (10) enables the transmitter (11).

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