Device for reducing jitter caused by pointer adjustments in a digital telecommunication network
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United States of America Patent
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Sep 14, 1993
Grant Date -
N/A
app pub date -
Oct 17, 1991
filing date -
Oct 17, 1990
priority date (Note) -
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Abstract
A device for reducing the jitter caused by pointer adjustments in a digital telecommunication network comprising of a circuit inserting in the vicinity of each phase step caused by a pointer adjustment, a plurality of smoothing phase steps in accordance with a deterministic smoothing pattern in order to eliminate, after having passed through a conventional desynchronizer, the quantifying effects of the phase steps. Provision also is made, for the case in which each phase step caused by a pointer adjustment comprises a plurality of bits, in that a control circuit is present to resolve the step into a plurality of elementary steps and to control the insertion of these steps in a manner matched to the rate of occurrence of pointer adjustments. In particular, the device applies to networks based on Synchronous Digital Hierarchy.
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