Line trunk unit connected to a time division switch, digital exc

Details Line trunk unit connected to a time division switch, digital exc Line trunk unit connected to a time division switch, digital exc

1994-01-28

1996-04-02

Marcelo, Melvin

Multiplex communications

Wide area network

Packet switching

370 681, 379229, H04J 312

Patent

active

055047408

ABSTRACT:
In a line trunk unit which is connected to a digital private branch exchange and can accommodate lines connectable to communications terminals or a network, a first interface unit establishes an interface between multiplexed highways coupled to the digital private branch exchange and a predetermined number of demultiplexed highways in the line trunk unit. A second interface unit communicates with a remote unit accommodating a communications terminal via a transmission line and communicates with a control unit of the digital private branch exchange via at least one of the demultiplexed highways, the control unit controlling a switch of the digital private branch exchange.

REFERENCES:
patent: 4689783 (1987-08-01), Kaczerowski
patent: 4694452 (1987-09-01), Beckinger et al.
patent: 4815072 (1989-03-01), Linda et al.

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