Clock receiver for network synchronization control of exchange s

Details Clock receiver for network synchronization control of exchange s Clock receiver for network synchronization control of exchange s

1996-05-09

1998-09-15

Butler, Dennis M.

Pulse or digital communications

Repeaters

Testing

395559, 375356, G06F 104

Patent

active

058092897

ABSTRACT:
A clock receiving circuit provides network synchronization control of an exchange system. The clock receiving circuit includes a clock receiving unit for receiving a predetermined number of network synchronization reference clock signals exhibiting differential voltage levels from a trunk or a digital office time supply, and providing output of the network synchronization reference clock signals in corresponding logic levels. A clock determination unit determines whether the network synchronization reference clock signals received in the clock receiving unit are from a trunk or a digital office time supply.

REFERENCES:
patent: 3920915 (1975-11-01), Schlichte
patent: 4740961 (1988-04-01), Renner
patent: 5103464 (1992-04-01), Capkun et al.
patent: 5259005 (1993-11-01), LaRosa et al.
patent: 5331667 (1994-07-01), Izumi
patent: 5481574 (1996-01-01), Evert et al.

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