I think that it is slightly odd because the Fritz!Box 7390 has a user-controlled SNR slider (performance versus stability). When I was on an ADSL2+ connection, I moved the slider one notch towards stability as the FB was trying to hold a downstream SNR of 3 (which it did most of time but not always). By moving the slider towards stability, I raised my target SNR to 5 and lost about 0.5Mbps in speed. When I moved to FTTC, I just left things as they were. I have no idea what it does to a FTTC connection. All I know is that my line is stable; i.e., I have had no disconnects.

I experimented with my F!B when I first connected it to 80/20 VDSL2, I found that max performance connected with SNR of 6, moving it downwards towards max stability appeared to change the target SNR margin about 1dB per step.

Of course, if your attainable rate remains above the 80/20 cap then your SNR margin will be higher anyway with less risk of excess errors or instability.

Edited by deleted (Wed 16-May-12 23:32:48)

In reply to a post by dspillett:

In reply to a post by RobertoS:

In reply to a post by dspillett:

As the upgrade is free, cost isn't an issue to you.

That might be only on BT.

The OP said the offer was for a free upgrade, though you are right that will not be the case with all ISPs. With A&A (my current ISP) there is no monthly price difference but there was a one-off admin fee of £10+VAT for existing 40/10 accounts to be upgraded.

?? I've just signed up with AAISP and I had to go for their Premium (£12/month) option to get the 40/10 cap removed.

In reply to a post by chrisadsl:

?? I've just signed up with AAISP and I had to go for their Premium (£12/month) option to get the 40/10 cap removed.

The old FTTC product line was 40/2 (normal) and 40/10 (premium), it is now 40/10 (normal) and 80/20 (premium). I was on the old premium so was only transitioning from old premium to new premium (same monthly cost). New signups are on 40/10 without the extra (though don't get the network priority that is implied in the wording for the premium product), and people on "old normal" 40/2 can presumably upgrade to 40/10 (new normal) for the one-off fee too.

In reply to a post by dspillett:

In reply to a post by chrisadsl:

?? I've just signed up with AAISP and I had to go for their Premium (£12/month) option to get the 40/10 cap removed.

The old FTTC product line was 40/2 (normal) and 40/10 (premium), it is now 40/10 (normal) and 80/20 (premium). I was on the old premium so was only transitioning from old premium to new premium (same monthly cost). New signups are on 40/10 without the extra (though don't get the network priority that is implied in the wording for the premium product), and people on "old normal" 40/2 can presumably upgrade to 40/10 (new normal) for the one-off fee too.

OK, with you now!

In reply to a post by RobertoS:

In reply to a post by dspillett:

As the upgrade is free, cost isn't an issue to you.

That might be only on BT. The charge by Openreach is £3.nn per month higher, then whatever BT Wholesale do, then perhaps an ISP markup, plus Vat. BT Retail seem to be swallowing it.

And IdNet. I wasn't even asked to extend my contract although as I'd only been a customer for two weeks that might have a special case. There's been no mention on the forums of any cost though.

In reply to a post by dspillett:

The OP said the offer was for a free upgrade ....

I missed that bit .

I am also with IDNet. Curiosity got the better of me and Support agreed that if I had issues then they could revert me back to 40/10. There was no discussion about any extension of the FTTC contract. The upgrade went through last night. MY Fritz!Box stats show attainable speeds of 94852/30933 and an actual connection of 79992/20000. Downstream SNR and LA are 11 and 10 and Upstream SNR is 12. I have just run a speedtest and I got a Ping of 13 and 65Mbps down and 9.8Mbps up. The error rate has increased slightly and there are more FECs(interleaving).

Brilliant .

I have to say I don't remember any reports of the troubles freshly occurring in the last week, so maybe whatever was found through the Aquiss investigation was a BT problem and the fix has now been spread through the system.

I believe it was MSIL settings.

In reply to a post by RobertoS:

I believe it was MSIL settings.

If I knew what they were then I might be worried.