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[EFM] Minutes from PON Optics Telephone Conference - 25th October


Lior Khermosk
Vipul Bhatt
Piers Dawe
Meir Bartur
Trement Miao
Richard Michalowski
Tom Murphy (hope I spelled all names correctly!)

Action Items

Vipul to formulate comment
Tom to communicate with Frank regarding status of GPON document liaison and
his presentation
Tom to communicate with Shawn Rogers regarding CDR sensitivity to
synchronous non-synchronous systems
Tom to communicate with Howard regarding policy for PICS
Tom to work on insertion loss tables, co-ordinate with Piers and others
Lior to work on testing

PON Timing

There has been very little feedback from PMD vendors regarding burst mode 
parameters. Because of this, Vipul suggested that the following solution for
moving forward:

Define a very generous upper limit for Tx on/off and Rx recovery.  This
is either obtained via MDC/MDIO or negotiated. (These upper limits could be
discussed at the 
next meeting but would be of the order of micro-seconds.) A slow Rx working
with fast Tx's would
fill out the preambles. Tx times of 16 ns etc are still allowed; is an
implementers issue.
There would be no PMD values listed in Clause 58, the values would
be limited by the protocol and listed at this section in the standard. A
in the PMD section would point to these limits with a statement that 
faster times are of course compatible.

Almost all of the group were in agreement that this is a good way to move
with one person wanting to think about it before the next meeting.


What is the effect on CDR operation with different timing schemes. For
example, are the
assumptions of 1 micro-sec based on syn system?

Next Meeting

Next Thursday 31st October.  Probably at 09:30 Pacific, but I need to
confirm this with the 100M group

All the best