Interface unit for telephone system having remote units

Details Interface unit for telephone system having remote units Interface unit for telephone system having remote units

1984-01-20

1986-02-25

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 58, H04Q 1100, H04Q 1104

Patent

active

045731519

ABSTRACT:
A telephony network for selectively transmitting voice and supervisory information among a plurality of subscriber lines. The network includes a central office including a switch and a plurality of remote modules each of which connects to several subscriber lines and multiplexes the voice and supervisory information onto a lesser number of highways for transmission to the central office. The central office and remote modules include an interface that connects to the highways and adjusts the format of the voice and supervisory information signals on the highways to the formats of such signals internal to the central office and remote modules, and transmits and receives control messages from and to a control processor at the central office and remote modules. The interface includes an interface module for each highway and redundant sets of control modules which include timing and other control circuitry and which connect to all of the interface modules in the interface.

REFERENCES:
patent: 4007338 (1977-02-01), McLaughlin
patent: 4357701 (1982-11-01), Canniff
patent: 4385379 (1983-05-01), Kelly et al.

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