[nsp] clock extraction

[Bruce Pinsky]

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Kostas Anagnopoulos wrote:

| Hi all,
|
| In http://www.cisco.com/warp/public/74/154.html cisco
| makes a distinction between clocked and unclocked circuits.
|
| The question i have is,what's the difference between a clocked and an
| unclocked circuit.
| My understanding is that timing is not carried separately from the data
| stream.
| Consequently network elements derive clock from the incoming bitstream.
| If this is the case,how the network elements detect the absence or existence
| of clock in a circuit.
|


See http://www.oreilly.com/catalog/t1survival/chapter/ch05.html

=========
bep

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