Digital wireless private branch exchange system

Details Digital wireless private branch exchange system Digital wireless private branch exchange system

1995-12-28

1998-07-14

Ton, Dang

Multiplex communications

Communication techniques for information carried in plural...

370342, 375200, H04J 1302

Patent

active

057815534

ABSTRACT:
A digital wireless private branch exchange system comprising a system body, a terminal device and a base station controller. The base station comprises an RF unit for modulating an analog IF signal to convert it into an RF signal, transmitting the resultant RF signal to the terminal device through a radio channel, receiving an RF signal from the terminal device through the radio channel, demodulating the received RF signal to convert it into an analog IF signal and transferring the resultant analog IF signal, an IF processor for converting a plurality of first frames with voice data and control data into an analog IF signal, transferring the resultant analog IF signal to the RF unit and distributing the analog IF signal from the RF unit, a base station controller for transmitting and receiving voice data and control data to/from the system body, and a plurality of channel controllers, each of the channel controllers forming the voice data and control data from the base station controller into the first frame, transferring the formed first frame to the IF processor, extracting a second frame from the analog IF signal distributed from the IF processor, separating the extracted second frame into voice data and control data and transferring the separated voice data and control data to the base station controller.

REFERENCES:
patent: 5590406 (1996-12-01), Bayley et al.
patent: 5638363 (1997-06-01), Gittins et al.

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