OOB for Optical Cables

Matt.Davis at Zarlink.Com Matt.Davis at Zarlink.Com
Mon Mar 8 15:55:10 PST 2010

Formatted message: <a href="http://www.t10.org/cgi-bin/ac.pl?t=r&f=r1003080_f.htm">HTML-formatted message</a>

I have a question about the optical OOB sequence defined in 2.1.  The 
optical OOB sequence was created to work better with traditional optical 
modules.  The intent was that upon power up, the host would query the QSFP 
and determine if the cable was copper or optical and then send the 
appropriate sequence. 
My question is, exactly which QSFP memory map bit will the host look at? 
Do we need to introduce a unique bit that identifies type of OOB 
supported?  What happens if you have an optical cable that can support 
both types of OOB sequences?
ZARLINK Semiconductor
Matt Davis | Sr. Field Applications Engineer
Optical Communications
Cell: 503-704-1441 | Office: 602-659-4628
matt.davis at zarlink.com | www.zarlink.com
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