Digital key telephone system

Details Digital key telephone system Digital key telephone system

1987-11-30

1989-10-10

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 62, H04Q 1104

Patent

active

048736821

ABSTRACT:
Communication paths in a digital key telephone system are operated by sequentially transferring bit states from origin channels associated with communication ports to exclusively dedicated time slots in a parallel transmission medium. Time slot bit states are selectively stored at designated memory locations corresponding to destination channels associated with the communication ports. The memory locations are read in synchronism with the channel occurrences and bit states from the designated memory locations are asserted in the corresponding channels, any remaining channels having predetermined bit states asserted therein.

REFERENCES:
patent: 4430733 (1984-02-01), Hardy et al.
patent: 4514597 (1985-04-01), Kikuchi et al.
patent: 4602132 (1986-07-01), Nagatomi et al.
patent: 4615028 (1986-09-01), Lewis et al.
patent: 4730304 (1988-03-01), Mezera et al.
patent: 4763316 (1988-08-01), Schaich et al.

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