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RE: WIS -- B1 processing


The B1 (section parity) check results are not ignored; they are provided to Layer Management in the form of the SectionES and SectionSES counters in the MIB ( and However, as the check results are not pertinent to the control and operation of the WIS sublayer itself, they do not appear as part of the required MDIO register set. I believe this is in keeping with customary practice; for example, the 1000 Mb/s MIB has a counter for false carrier events detected by the PHY, but there is no MDIO register dedicated to this purpose.

Best regards,

- Tom Alexander

-----Original Message-----
From: Stephen.Finch@xxxxxx [mailto:Stephen.Finch@xxxxxx]
Sent: Friday, December 29, 2000 9:24 AM
To: stds-802-3-hssg@xxxxxxxx
Subject: WIS -- B1 processing
Reference figure 50-3.

The WIS generates and checks the B1 (BIP-8) value.  I can find no where
that the results of the check are used.  What should be done with any
error count that results?  There are no MDIO registers defined to take
this value.  Section defines a counter that appears to hold
this info.

Per T1.231 Section; "... Performance monitoring using the BIP-8
for SONET Sections is application specific."

Seems stupid to generate and check it, but ignore any errors that

Am I missing something?

Steve Finch