Digital pbx system

Details Digital pbx system Digital pbx system

H - Electricity

04

Q

344/25

H04Q 11/04 (2006.01)

Patent

CA 1172738

W. Williams - M. Burke 1-1 DIGITAL PBX SYSTEM ABSTRACT A small capacity digital PBX-key system which uses a single processor to control the system. Since only a single processor is employed, the system is interrupt controlled. In the system, there is a codec per line, the codecs each haying sufficient programmability to eliminate the need for time slot interchangers. To provide as many as 64 (or more) channels usable for speech, tones and conferencing, two (or more) parallel, 32 channel busses are used as the group bus. The stations and trunks (ports) of the system have access to both busses through the codecs. Information is routed to one or another bus through the transmission of bus control bits from the processor.

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