C&W Line Management ?

How does C&W LLU manage the sync speed versus line quality i.e. what is their version of BT's Dynamic Line Management ?

There is no DLM on C&W circuits in the traditional sense (i.e no automatically shifting SNR or interleaving mode (on/off)).

The only thing that can occur is the interleaving depth can change on sync depending on the line condition at sync.

Matt

What's the default noise margin?

9db.

Matt

Thanks Matt.. I thought so but wasn't sure I was remembering correctly.

So I expect there is an inherent stability gain and speed loss compared to a healthy BT Wholesale line set to 6dB.

There can be... some lines can be found on a 6db/Fast profile giving very good results, but they are very far and few between because this isn't officially supported.

However, C&W are completing software upgrades over their national network resolving a few problems and they are re-reviewing their testing of a more Fast profiles, as well as ones with 6db margins to be rolled out nationally, no fixed date as yet though.

Matt

That'll be good . Or should I say, it's already good, and that will be even better!

In reply to a post by uno:

There can be... some lines can be found on a 6db/Fast profile giving very good results, but they are very far and few between because this isn't officially supported.

However, C&W are completing software upgrades over their national network resolving a few problems and they are re-reviewing their testing of a more Fast profiles, as well as ones with 6db margins to be rolled out nationally, no fixed date as yet though.

Matt

do that mean that the 10db SNR i have now will go down to 6db? That would be good, it would give me a bit of extra speed.