Digital trunk supervisory decoder multiplexor for ground...

Details Digital trunk supervisory decoder multiplexor for ground... Digital trunk supervisory decoder multiplexor for ground...

H - Electricity

04

Q

344/25

H04Q 11/04 (2006.01) H04J 3/12 (2006.01)

Patent

CA 1121894

DIGITAL TRUNK SUPERVISORY DECODER MULTIPLEXOR FOR GROUND START OR E&M SIGNALLING ON A COMMON Tl SPAN ABSTRACT OF THE DISCLOSURE Digital Carrier Trunks connected via a super- visory decoding and multiplexing logic to an electronic digital PABX. The circuit is arranged to receive or transmit the supervisory signal in either the "Ground Start", E&M modes or a combination of both in either the D2 or D3 signalling format over a Tl carrier span without converting to the analog signal form.

333965

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