my profile would appear to have changed but only a small bit, upload is unchanged, download is up to 32 now from 29ish

Good stuff Orly! Very pleased for you!
cheers, a

I was away last week, so couldn't check then. However, it looks like we had a change at the beginning of this week:

- Latency dropped from 19ms to 10ms, suggesting interleaving got turned off.
- IP Profile is now 38716 - but was 34799, or slightly lower
- Actual download speed now 37.5Mbps, but was 33.5Mbps (on speedtest.net)
- No change in upload profile or speed - profile of 10000, speeds of 8.2Mbps.

My first 2 days (back in June) had the full profile speed, and low latency, but with 4% packet loss. DLM increased latency & dropped speed to fix this... but we now seem to be back on full whack.

It could be that someone fixed our line (at 650m, it should have been able to handle full speed), or it could be that 17a got turned on here. I'll assume the latter - but I really will have to get around to flashing the modem to find out!

In reply to a post by orly:

Essentially we've gained 5-6Mbit download at the expense of about 2Mbit upload speed.

Might this be a new profile for the service as a whole using different frequencies? I'm not too worried at losing a bit of upload for better download.

I just posted about this on the Fibre forum, but essentially the answer is yes: new profile *and* different frequencies.

BT's switch to profile 17a also seems to include a switch from bandplan 997 to bandplan 998.

The differences are that:
- In the existing frequencies (under 7MHz), around 0.6MHz is swapped from upstream to downstream
- The first 1.5MHz of the new frequency allocation (above 7MHz) is given to downstream; if they stuck with 997, it would have gone to upstream.

Your experience suggests you've experienced changes because of both parts, but that you then haven't gained much from the additional upstream (8.5MHz - 12MHz) or the higher downstream (12MHz - 17MHz)