Method and apparatus for implementing a cost efficient voice/dat

Details Method and apparatus for implementing a cost efficient voice/dat Method and apparatus for implementing a cost efficient voice/dat

1985-11-04

1987-08-25

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 67, H04J 312

Patent

active

046897887

ABSTRACT:
A method of providing simultaneous voice and data communication for multiple ports in a digital line card of a PBX is provided. In one form, 64 K baud non-blocking voice communication for seven coupled ports and simultaneous 9.6 K baud user data communication for each port may be implemented in a single conventional line card. Voice and data bits are transmitted in frames comprising thirty-two time slots. Data bits from the various user ports are multiplexed into a single eight bit time slot. Voice bits for each port are transmitted in eight bit time slots. In one form, each time frame comprises four time slots for data and twenty-eight time slots for voice.

REFERENCES:
patent: 4381427 (1983-04-01), Cheal et al.
patent: 4466095 (1984-08-01), Kawano et al.
patent: 4584680 (1986-04-01), Carter et al.

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