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Re: 155Mbs and Full Duplex

  • From: murray@pa.dec.com (Hal Murray)
  • Date: 2 Jan 1998 05:48:33 GMT

In article <68dmkv$cvj$1@vixen.cso.uiuc.edu>, kline@spiffy.cso.uiuc.edu (Charley Kline) writes:

> OC-3 over SONET uses 8B10B coding so the actual signalling rate on the
> medium is up around 200 Mb/s or so for 155Mb/s of data

One of us is confused.

The OC-3 that I've worked with doesn't use 8B10B.

There is a scrambler to ensure lots of transitions for clock recovery.
ATM over OC-3 uses an additional scrambler so that packets with nasty data
patterns won't cause troubles.