I'd like to share my recent experience with FTTC and get some advice on whether I should resync my modem, just to see what would happen if anything.
I'm on BT Infinity, D-Side is 300 meters according to the engineers JDSU and it's been stable for 8 months at 38717/10000 with 37.5/8 Mbps throughput and 15ms latency. Been very happy with it.
10/06/2011 - Early morning the internet goes down, rang the status line and it's because of "planned maintenance and upgrades" in my area due to complete by 6 AM and I may need to reboot the hub. So I went to bed and checked the speed next morning, 38717/10000 but 32.5/7.7 Mbps throughput and 29ms latency. Not good but I presume the work isn't quite complete and it'll improve as the IPProfile hasn't changed.
Strangely the hub kept sync the whole time and didn't need rebooting so I left it.
13/06/2011 - Throughput not improved and now IPProfile has dropped, for the first time ever, to 33566.
So I contact support, while trying to get some action I do a few manual resyncs by rebooting the modem with 2-3 days apart. 34933 is the max I managed to get giving 33.7 Mbps throughput.
Eventually support agreed to book an engineer, the first one didn't show, a second was booked and immediately canceled so support got back onto OR. OR said they had trouble remotely testing my cuircuit but it would be fixed soon and they would then run some tests. The next day...
30/07/2011 - It seems OR have optimised the 36 Mb sync rate rather than put it back to 40 Mb, IPProfile is the same but throughput has improved to 34.2 Mbps and latency from 19 to 11ms.
Not what I'm after but the best I can probably hope for on a 36 Mb sync rate. At this point I've exhausted the support channels and have the option of going to the ombudsman, which i decide against becasue although I want the max performance my line can support (A) It's still very fast (B) latency is the best it's ever been (C) upto 80 Mbps is hopefully around the corner when the sync rate will be reset anyway.
So I give up, enjoy a stable line and note the hub is keeping sync day after day.
Hello, hang on...
30/08/2011 - Exactly one month since OR seemingly optimised the performance of my 36 Mb sync rate and with 42 days uptime on the hub, a resync is forced at 01:53 AM. IPProfile has risen to 37616, throughput to 36.5 Mbps and latency has stayed at 11ms.
I did not expect that!
So now I'm 1 Mbps down on throughput but have better latency than before the drop. That will do nicely. Though I can't help but wonder, if that profile will rise to the max 38717 if I do a manual resync during the day. What do you recon, shall I risk it? I'm very tempted if just to see what would happen but don't want it to fall back to the 36 Mb sync rate.
It seems it is possible for the sync rate to rise without the need for an engineer visit but whether it has gone up on it's own or as a result of OR intervention I'm not sure. Seems a pretty big coincidence that it changes exactly a month after OR seemingly optimised the 36 Mb sync performance.
I'd appreciate your thoughts and advice.