RE: re[2]: Why wrong LINE rate could cost dear

["Chang, Edward S" <Edward.Chang@xxxxxxxxxx>]

Bob:

Thanks, I appreciate the very valuable information.  VCSEL will play a major
role for 10GbE product.

Thanks again, 

Ed Chang 

-----Original Message-----
From: Rob Marsland [mailto:rmarsland@xxxxxxxxxxxx]
Sent: Tuesday, June 29, 1999 10:27 AM
To: 'Chang, Edward S'; 'Bill Woodruff'
Cc: 'stds-802-3-hssg@xxxxxxxx'
Subject: RE: re[2]: Why wrong LINE rate could cost dear



Ed,
   I think it is clear that VCSELs are already operating at 10 Gbit/s.  The 
data I presented at the June meeting was with multi-mode 850nm VCSELs.  I 
believe there was also a Lucent talk based on 10 Gbit/s 850 nm VCSELs.  The 
question is really in the details of what extinction ratio and coding 
overhead are required.  I'm with Martin Nuss when it comes to having a 
strong preference for 10 Gbaud over 12.5.  Also, extinction ratio >>6 dB is 
challenging with direct modulation at these rates (although clever TX 
designers may come up with a way of beating the VCSEL into submission).

Rob

Robert A. Marsland
Focused Research, Inc. (a New Focus company)
555 Science Dr.
Madison, WI 53711
(608) 238 2455
(608) 238 2656 FAX

-----Original Message-----
From:	Chang, Edward S [SMTP:Edward.Chang@xxxxxxxxxx]
Sent:	Tuesday, June 29, 1999 7:50 AM
To:	Bill Woodruff; Perkins, Drew; 'piers_dawe@xxxxxx'; 
'stds-802-3-hssg-speed@xxxxxxxx'; 'stds-802-3-hssg@xxxxxxxx'
Subject:	RE: re[2]: Why wrong LINE rate could cost dear


Bill:

I believe, users support both serial and parallel approaches.  Both are
equally viable.  It is a mistake at this initial stage using limited
knowledge to determine the market several years down the road.  Market is
shaped by human preferences, then technologies; therefore, we can not use a
few technical facts to predict future market direction.

When we, a group, introduced VICEL to industry, there were objections
everywhere.  Today, Vixcel is the winner.  Whenever, there are needs in
market, someone will come up with a right product.

By the way, do you think VCSEL will perform at 10 Gbps in the near future?

Ed Chang
Unisys Corporation
Edward.Chang@xxxxxxxxxx