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RE: Clause 49 PCS Gear Box

The gearbox is described in 49.2.7. The material in the presentation to
which you refer 
(walker_1_0300.pdf pages 13 and 14) was an example of how one might
implement a gearbox.
Where possible, we write 802.3 standards to specify behavior at
compatability interfaces
and allow any implementation that will produce the required behavior.
Therefore, clause
49 describes the function the gearbox must provide and does not include
information from
the implementation example.
-----Original Message-----
From: Rabinovich, Rick [mailto:rick.rabinovich@xxxxxxxxxxxxxx]
Sent: Friday, October 13, 2000 5:34 PM
To: stds-802-3-hssg@xxxxxxxx
Subject: Clause 49 PCS Gear Box

After reading Clause 49, I did not see any reference to the 33:32 Gearbox
logic as presented at the conference in Albuquerque on 3/6/00. Is there a
description somewhere else? In that presentation I saw an analog phase
detector, is there any suggestions on a digital implementation on an FPGA?

Rick Rabinovich 

Rick Rabinovich 
Hardware Group Lead Engineer 
System Architect 
Spirent Communications 
26750 Agoura Road 
Calabasas, CA 91302 
Phone: 818-676-2476 
Fax    : 818-880-9293 
Email: rick.rabinovich@xxxxxxxxxxxxxx