regarding proposal 850nm Serial PMD update, jewell_2_0900
There is an concept for a low cost transceiver with the following
o 10Gbps serial Ethernet transceiver, not optical WWDM
o 4 x 3.125 electrical interface (XAUI)
o simple 4:1 MUX of these 4 lanes in transmit direction and
simpled CDR to 1:4 Demux to 4 el. lanes in receive direction
o 12.5 Gbps optical (one wavelength, one fibre) in each direction
This concept comes from PicoLight 09/00
850 nm Serial PMD Update <jewell_2_0900.pdf> page 6
I can't associate a 10GBASE-nn standard in the actual state of the
IEEE 802.3ae draft to this concept. The only common interface
is the XAUI and the specified BitRate is not a result of a 4:1 MUX.
I am not sure, but does it has any influence to bandwith, if a part of the
PCS functions is not implemented ?
The good is,
1st) it seems to be a low cost version, very interesting for mass market
2nd) if You use two of such transceiver, you will have a
compatible transceiver system in a 10G Ethernet environment (point
That comes close to the idea and actual concepts of Fibre Channel.
The bad is,
1st) i see no standard on optical interface, isn't it ?
2nd) does a MSA exist ?
Is there anyone whos is discussing such concepts ?
Is there any agreement about a comparable solution ?
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