Duplex interconnect/dispatch trunked radio

Details Duplex interconnect/dispatch trunked radio Duplex interconnect/dispatch trunked radio

1995-04-13

1996-08-06

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 951, H04Q 728

Patent

active

055441599

ABSTRACT:
A subscriber unit for use with a duplex communication system is described. The present invention contemplates a duplex transceiver which incorporates data and voice handling capablity. A microprocessor generates data and DTMF signalling as well as decoding received data. According to the principles of the present invention, an improved duplex capable subscriber unit is achieved by coupling a microprocessor to a duplex transceiver through switchable filters. The filters exhibit a relatively fast or slow time constant depending on the state of a filter control input. The microprocessor is then capable of operating the subscriber unit with optimum frequency response characteristics depending on whether voice or data is being received. In addition, a summing network coupled between the microprocessor and the transmit switchable filter cooperates with the switchable filter and allows the duplex subscriber unit of the present invention to generate DTMF signalling.

REFERENCES:
patent: 3641433 (1972-02-01), Mifflin et al.
patent: 3786199 (1974-01-01), Rimbach, Jr.
patent: 3956589 (1976-05-01), Weathers et al.
patent: 3970801 (1976-07-01), Ross et al.
patent: 4079188 (1978-03-01), Kinch, Jr. et al.
patent: 4238850 (1980-12-01), Vance
patent: 4246582 (1981-01-01), Kondo et al.
patent: 4288868 (1981-09-01), Grotjohann et al.
patent: 4308429 (1981-12-01), Kai et al.
patent: 4381561 (1983-04-01), Treiber
patent: 4399555 (1983-08-01), MacDonald et al.
patent: 4593389 (1986-06-01), Wurzburg et al.
patent: 4612415 (1986-09-01), Zdunek et al.
patent: 4635285 (1987-01-01), Coombes
patent: 4672601 (1987-06-01), Ablay
patent: 4677656 (1987-06-01), Burke et al.
patent: 4712229 (1987-12-01), Nakamura
patent: 5408466 (1995-04-01), Ablay

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