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Next Generation SDH/SONET (Evolution or Revolution?) || LCAS Time Sequence Diagrams

✍ Scribed by van Helvoort, Huub

Publisher: John Wiley & Sons, Ltd
Year: 2005
Tongue: English
Weight: 118 KB
Edition: 1
Category: Article
ISBN: 0470091207
DOI: 10.1002/0470091223.ch5

No coin nor oath required. For personal study only.

✦ Synopsis

Timing the procedure

Even though the LCAS protocol has been defined using SDL, which would be sufficient to implement the protocol correctly, the ITU-T recommendation G.7042 contains some examples of specific LCAS operations to enhance its understanding. These examples are in the form of time sequence diagrams to explain the time relation between the successive steps taken during the operation of the protocol. As the SDL diagrams are state-machines they do not contain this timing information. This chapter also provides some examples of typical LCAS state transitions. Some are based on planned changes of the size of a VCG and some are based on unplanned occurrences in the network affecting one or more members in a VCG.

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