I wonder if anybody has seen this pattern, or lack of pattern? We are on the Cranleigh exchange, about 700 metres from the cabinet and more than double that from the exchange.
Nope. On the whole, it seems we don't get many reports of this kind of disconnection problem on FTTC.
But they *do* occur to some people - "Bald Eagle" on here being one victim. When present, they do seem to be harder to eradicate than normal - perhaps because the more "obvious" faults are eliminated by having an engineer install the service in the first place.
The pictures that "your ISP" are looking at are the PPP re-connects, as this is all they can see. Unfortunately, it would be more helpful for you to see what is happening on your line in a little more detail than is available to PN... if you are up for it. Three sources spring to mind...
1. Easy: You can discover your IP profile value by performing a BT Speedtest. Use either (a) the BT Speedtester here
, and keep track of the IP profile values each test reports, or (b) The BT Wholesale tester here
, but you have to request the extra diagnostics after the initial speed test.
From the profile, we can calculate the actual sync speed (multiply by 1.033, I think). If these numbers are changing regularly (and changing significantly) then you might be seeing a problem.
2. Harder: You can monitor the latency of your connection using a TBB Broadband Quality Meter
, BQM or Ping graph. You really need a static IP for this to work well.
Changes in latency can indicate that DLM has intervened, as a result of errors or disconnections on the line.
3. Harder: You can unlock the modem, making the line diagnostics & statistics available. This gives people the clearest picture of what is going on, but requires you to reflash the firmware in the modem, and add an extra networking cable. Take a look here
, and you could make the diagnostic information visible.
4. Middling. Once unlocked, you can install some scripts onto your PC to interrogate the modem for statistics, building graphs as a snapshot, or over longer periods.
The graphing scripts were created by Bald Eagle, and he used them to good effect with PN to investigate his fault.