No, I reckon it's at your ISP's Authentication Server.

So, in other words, it's not a line fault at the local loop level. Weird thing is, as far as I can tell, there has been no loss of service or planned maintenance at the exchange lately

Edited by matthewcl375 (Sun 10-Feb-13 16:35:20)

It never happened at the exchange or on any phone wiring; it was at some remote server of the ISP's.

Ah right, that's good then.

Well, its nearly been 10 days since I last rebooted the router, think I'm gonna wait till 14 days has passed for the SNR Margin to reset itself. Does the DLM normally resync the router itself, or does it require a manual reboot on the 14th day?

When the DLM changes the sync-time margin it normally causes an automatic re-sync.

If it happens at night, then I'd wait a couple of days and then do a daylight manual re-sync.

Thanks, and is it normal for the Target SNR Margin to reset itself or is it more likely that it will remain as it is until the ISP intervenes?

Just trying to get other people's experiences when this has happened to them

My stats (note the lack of errors):

Uptime: 9 days, 4:03:53
DSL Type: ITU-T G.992.1
Bandwidth (Up/Down) [kbps/kbps]: 448 / 4.672
Data Transferred (Sent/Received) [GB/GB]: 1,99 / 1,06
Output Power (Up/Down) [dBm]: 11,9 / 13,8
Line Attenuation (Up/Down) [dB]: 6,0 / 6,0
SN Margin (Up/Down) [dB]: 23,0 / 16,6
System Vendor ID (Local/Remote): TMMB / ----
Chipset Vendor ID (Local/Remote): BDCM / ALCB
Loss of Framing (Local/Remote): 0 / -
Loss of Signal (Local/Remote): 0 / -
Loss of Power (Local/Remote): 0 / -
Loss of Link (Remote): -
Error Seconds (Local/Remote): 0 / -
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): - / 0 / 0

Edited by matthewcl375 (Mon 11-Feb-13 17:33:16)

Looking good with those figures.

Re your question, I think I referred you to this page a while ago, and you picked up on Cause 4. No real change from that I'm afraid, although these days it may be easier to get it reset to defaults. (A new 10-day training period). But I have a feeling that is only easily done on WBC connections, even now.

Fingers crossed, then Hoping tomorrow I will wake up and it will have resynced overnight, my question would be this,

It has now been 15 days since the line was fixed, but during the first week or so I was rebooting the router occassionally. So effectively it has only been up continuously for 9 days (as the stats show),

Who knows, the DLM may have even already reset, it may just be waiting on a resync by me

Edited by matthewcl375 (Mon 11-Feb-13 18:50:27)

I advise 14 days from the last reboot. However once I accidentally did two reboots in the period, and the change still happened on the 10th day. With an auto-re-sync.

Well,

Woke up this morning and found the DLM has done its magic overnight! I can see this in the error log:

Feb 12 07:48:57 xDSL linestate up (ITU-T G.992.1; downstream: 5792 kbit/s, upstream: 448 kbit/s; output Power Down: 13.8 dBm, Up: 11.9 dBm; line Attenuation Down: 6.0 dB, Up: 6.0 dB; snr Margin Down: 12.4 dB, Up: 23.0 dB)

So it in fact happened on the 9th day Is this the right kind of speed increase you would expect with a 3db lowering of the SNR Target?

Only thing I'm concerned about, if I go into line stats I have these following errors, could they be to do with the re-sync that occurred last night?

Loss of Framing (Local/Remote): 9 / -
Loss of Signal (Local/Remote): 1 / -
Loss of Power (Local/Remote): 0 / -
Loss of Link (Remote): -
Error Seconds (Local/Remote): 11 / -
FEC Errors (Up/Down): 0 / 0
CRC Errors (Up/Down): 0 / 0
HEC Errors (Up/Down): - / 0 / 0

Edited by matthewcl375 (Tue 12-Feb-13 16:24:05)