[c-nsp] WAN PHY and OTN(G.709) modes

Phil Mayers p.mayers at imperial.ac.uk
Wed Aug 29 04:33:11 EDT 2012

On 08/28/2012 05:33 PM, Mikael Abrahamsson wrote:
> On Tue, 28 Aug 2012, Phil Mayers wrote:
>> WAN PHY is only useful if you need to run over SDH, so not useful over
>> dark fibre, as far as I can see.
> The B1/B2/B3 parity counters are useful even over dark fibre as it'll
> tell you if you're getting bit errors, even though that bit error didn't
> hit any actual packet.
> So it's useful for verifying link quality even before putting live
> traffic on it.

That's an interesting idea. Are those counters well-exposed on kit that 
supports WAN PHY?

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