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[802.3ae] Clarification request CJPAT etc

I would like to clarify some discontinuities within the latest version
of the 10GE document with respect to the requirement to implement
the High Frequency, low frequency, CJPAT and CRPAT generators
and detectors.

Clause 45 Describes a test pattern enable bit in various registers which
reference clause 48A (the XAUI test pattern clause) For example see

In every case, the test pattern enable bit is defined using text which
includes "Pattern testing is optional..." This implies that pattern testing
using the patterns described by Annex 48A is strictly optional.

However, there are two sections in the document which contradict
this requirement. Clause 48 PICS section has a requirement
defined as CC1 "Jitter test Patterns" referencing Annex 48A with
MANDATORY capability status.

Beyond this, most of the patterns defined in Annex 48A contain the
text "pattern is not intended for jitter compliance testing" with the
exception of paragraph 48A.5 which states "The following pattern is
intended for receive jitter compliance testing."

It is my understanding that the requirement to generate and detect the
patterns defined by Annex 48A would be strictly optional, yet the PICS
and paragraph 48A.5 appear to contradict this intention.  Could somebody
please clarify this understanding prior to my submission of a comment
to resolve this.


Tim Warland  P. Eng.
Applications Engineer
Quake Technologies   (613)270-8113 ext 2311

Tough Times don't last, tough people do