Channel access system

Details Channel access system Channel access system

1990-04-17

1991-05-28

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

3701111, 370 851, 370 8515, H04J 322

Patent

active

050200534

ABSTRACT:
A channel access system comprises n channel parts for receiving m channels of voice signals and for outputting voice frequency data and signaling data, and a multiplexer part for receiving the voice frequency data and the signaling data of the m channel from the n channel parts and for supplying channel access signals to the n channel parts for designating a channel of the voice frequency data, where each of the n channel parts include a coder for coding a corresponding one of the voice signals into one of the voice frequency data, a decoder for decoding the channel access signals and for generating a synchronizing signal which is synchronized to a corresponding one of the channel access signals which designates its own channel, a signaling converter for converting the corresponding one of the signaling signals into a corresponding one of the signaling data, and a speed converting circuit for converting a transmission speed of the signaling data from a first transmission speed to a second transmission speed which is higher than the first transmission speed. The synchronizing signal controls a coding timing of the coder and a speed conversion timing of the speed converting circuit.

REFERENCES:
patent: 4580259 (1986-04-01), Harada et al.
patent: 4627047 (1986-12-01), Pitroda et al.
patent: 4813040 (1989-03-01), Futato
patent: 4815105 (1989-03-01), Bottoms et al.
patent: 4864562 (1989-09-01), Murakami et al.
patent: 4924458 (1990-05-01), Obara

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