An improved method and system for hit-less switching

Details An improved method and system for hit-less switching An improved method and system for hit-less switching

H - Electricity

04

L

H04L 1/22 (2006.01) H04B 1/74 (2006.01) H04J 3/06 (2006.01) H04L 12/24 (2006.01) H04Q 11/04 (2006.01)

Patent

CA 2288559

A system and method are disclosed for processing digital signals in a telecommunications system that allow hit-less switching between a first digital signal in which a first payload, a first payload indicator marker and a first overhead are transported on a first channel, and a second digital signal in which a second payload identical to the first payload, a second payload indicator marker and a second overhead are transported on a second channel. The present invention includes first and second pointer followers, first and second elastic buffers with control circuits, a monitor circuit, a multiplexer, and a pointer generator. The first and second elastic buffer control circuits each further comprise a write counter, a read counter, a phase detector, and a leak-out mechanism for reinitializing the system after a protection switch. The present invention hit-lessly selects between the first and second digital signals without having to frame align the signals.

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