System and method for synchronizing telecom-related clocks...

Details System and method for synchronizing telecom-related clocks... System and method for synchronizing telecom-related clocks...

2002-10-18

2009-06-30

Harper, Kevin C (Department: 2416)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

Reexamination Certificate

active

07555015

ABSTRACT:
A system and method for synchronizing clocks related to telecommunications across an unsynchronized point-to-point network connection utilizes downstream data timed using a high frequency transmission clock to transfer timing information of a central telecom-based clock from a first network node to a second network node. In an exemplary embodiment, the point-to-point network connection is an Ethernet-based connection that operates in accordance with a Gigabit Ethernet standard. The timing information of the central telecom-based clock is extracted from the transmitted data at the second network node by recovering the high frequency transmission clock and then, deriving a reference clock, which is synchronized with the central telecom-based clock, from the recovered transmission clock. The reference clock is then used to generate one or more telecom-related clocks that are used by the second network node.

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