Private telephone installation architecture

Details Private telephone installation architecture Private telephone installation architecture

1990-06-19

1993-01-05

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

379 94, H04Q 1104

Patent

active

051777355

ABSTRACT:
The invention concerns private telephone instalations, in particular key systems or small time-division switches, each provided with a central unit (2) including a time-division digital switching network (3) controlled by a control unit (4) to enable communication of a pluality of telephone or terminals (1) either directly by means of the switching network or by means of telephone lines (32) terminating at a local central office, the telephones or terminals or lines being connected to termination circuits (30, 31) which connect them to the switching network (3) via at least one time-division multiplex link (12) and to the control unit (4). A two-wire bidirectional signalling link (13) is time-shared between all the termination circuits for interchanges of signaling with the control unit (4); it is connected direct to a series-parallel converter circuit (8).

REFERENCES:
patent: 4061880 (1977-12-01), Collins
patent: 4211895 (1980-07-01), Davis et al.
patent: 4345251 (1982-08-01), Begeman et al.
patent: 4567589 (1986-01-01), Lecomte et al.
patent: 4809260 (1989-02-01), Davidson
patent: 4839888 (1989-06-01), Baltz et al.
patent: 4887264 (1989-12-01), Mano et al.
U.S. patent application Ser. No. 07/299,152, Inventors: Gerard Vergnaud and Gerard Thomas: "Time Division Switching System".

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