Multiplex communications – Wide area network – Packet switching
Patent
1986-06-19
1989-03-07
Cangialosi, Salvatore
Multiplex communications
Wide area network
Packet switching
375118, H04J 307
Patent
active
048113409
ABSTRACT:
In a synchronous network, asynchronous data signals are synchronized using positive
egative stuffing under the control of stuff request signals which are produced in dependence upon the phase difference between the asynchronous and synchronized data signals as compared to respective threshold values. The phase difference is, or the threshold values are, cyclically changed in a manner to produce additional stuffing, not necessitated by the asynchronous frequency difference, whereby the frequency of jitter, due to stuffing, in the synchronized data signal is increased. The increased frequency jitter is filtered out in an already-provided phase locked loop.
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Grover Wayne D.
McEachern James A.
Cangialosi Salvatore
Haley R. John
Northern Telecom Limited
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