Circuit for interfacing a processor to a line circuit

Details Circuit for interfacing a processor to a line circuit Circuit for interfacing a processor to a line circuit

1982-04-22

1985-01-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04Q 1104

Patent

active

044956142

ABSTRACT:
A line switch for a digital telephone switching system utilizes distributed processing. The line switch comprises one or more switch modules. Each switch module is coupled to a central office switching system via one or more PCM lines which utilize common channel signaling. Each switch module comprises groups of line circuits, each line circuit being coupled to a subscriber line. Three separate distributed processor functions are provided in each line switch module. A first processor is utilized to communicate with the central office switching system and to coordinate the operations within the line switch module. A second processor is provided to control clock generation and rate conversion circuits. Each group of line circuits includes a third processor to control the operations of the line circuits and to gather information from the line circuit. A busing arrangement is provided within the line switch such that both control information and PCM voice data are routed throughout the line switch.
A standardized interface circuit is provided which interfaces each line circuit to the third processor and also to the busing arrangement.

REFERENCES:
patent: 4146749 (1979-03-01), Pepping et al.
patent: 4322843 (1982-03-01), Beucher et al.
patent: 4379950 (1983-04-01), Ahmed et al.
patent: 4382294 (1983-05-01), Beucher et al.
patent: 4417335 (1983-11-01), Kelley et al.

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