Thread Links Date Links
Thread Prev Thread Next Thread Index Date Prev Date Next Date Index

RE: PHYs with 10.000 and 9.584640

Title: RE: PHYs with 10.000 and 9.584640


In essence, this is placing the burden on the subset of PHY implementers.  I'm not advocating a PHY that works at two rates, I'm advocating a MAC/PLS that works at one rate - 10Gb/s.  The PHY's would map the MAC/PLS data rate to their corresponding data rate, and in this architecture, only the WAN PHY would have to do something special to decrease the data rate to 9.58464 Gb/s.  Maybe a new PHY sublayer is necessary to perform the data rate mapping.

I don't think we require two separate PARs because of the differences in a LAN PHY compared to a WAN PHY.  What I believe is required is to isolate where the differences between these two types of networks are, and I believe that can be done by having a LAN PHY and a WAN PHY.  To the system designer, the implementation becomes easier if they can pick a 10GbE MAC and plug it to a PHY of their choosing.  The PLS service interfaces are the same and the operations inside the MACs are the same, only the PHYs are different: one is LAN capable, and the other is WAN capable.  Keeping this all in one PAR can help to guarantee this interoperability of MAC, PLS and PHY.


Brad Booth
Level One Communications, Austin Design Center
(512) 407-2135 office
(512) 589-4438 cellular