[c-nsp] HWIC-1ADSL-M

[Richard Brady]

Hi Alex

This is an interesting one. I've used 877-M and 1801-M with Be/O2 and
don't have a problem on Annex M.

On Friday I tried both with a Tiscali (via Griffin) service and
couldn't get it to sync at Annex M. When they re-graded it to remove
the Annex M it suddenly synced, but now we are seeing pretty bad QoS,
mostly packet loss. Doesn't seem to be line (SNR) or bandwidth
related, but there is significant error correction activity on the
downstream link which I find strange.

I have heard rumours about Cisco kit not liking the Tiscali DSLAMs but
can't find anything to back this up.

Richard


> On Thu Sep 03, 2009 at 07:16:27PM +0100, Alex Pimperton wrote:
> > Reading through the specs for the above card Cisco mentions not
> supporting
> > "UK Mask".
> >
> > Does this mean the card doesn't work for ADSL-M (Seemingly often
> branded as
> > SDSL-M) in the UK?
>
> ADSL and SDSL are two very different things. HWIC-1ADSL-M will do
> ADSL2+, but
> probably not SDSL.

I'm aware that it's ADSL 2+ underneath but some providers (Spitfire,
Nildram) are marketing their ADSL Annex-M products as "SDSL (M)", presumably
because of the symmetrical upload/download, and the fact that it sounds like
SDSL, which business are already familiar with.

>
> > We're looking at getting some SDSL-M circuits to see what they're
> like, from
> > Spitfire and Nildram (Tiscali), anybody using either HWIC-1ADSL-M or
> C877-M
> > with those providers Annex M services?
>
> We sell ADSL2+ services in the UK using Be/O2 LLU tails, and they have
> "approved" bother the HWIC-1ADSL-M and the C877-M for their service.
> I'm using
> a C877-M right now.

Thanks Simon, I saw mention of the C877-M on the BE UserGroup website but no
specific mention of Annex-M products on the (colourful) BE website.

Anybody else using Cisco kit at the end of an Annex-M tail from another
provider?

Cheers,

Alex