Hi,
Over the last couple of weeks my broadband connection has started droping 2 or 3 times a day, around the same time period each day. I have been working through the troubleshooter to try and isolate possible causes. So far I think I can rule out interference from other equipment - turning them on when normall off or off when normally on does not seem to change the pattern of disconnections.
I changed my router to a Vigor 130 modem plus EdgeRouter-X router a couple of months back, from an ancient Billion modem router combo, and I can see more detailed connection details from the modem. Modem firmware is latest and greatest. The information reported is as follows:
> adsl status
--------------------------- ATU-R Info (hw: annex A, f/w: annex A) -----------
Running Mode : ADSL2+ Annex A State : SHOWTIME
DS Actual Rate : 12619000 bps US Actual Rate : 1147000 bps
DS Attainable Rate : 12680000 bps US Attainable Rate : 1148000 bps
DS Path Mode : Fast US Path Mode : Fast
DS Interleave Depth : 1 US Interleave Depth : 1
NE Current Attenuation : 34 dB Cur SNR Margin : 9 dB
DS actual PSD : 19. 9 dB US actual PSD : 12. 4 dB
NE Rcvd Cells : 19411587 NE Xmitted Cells : 5493622
NE CRC Count : 1064 FE CRC Count : 0
NE ES Count : 846 FE ES Count : 0
Xdsl Reset Times : 0 Xdsl Link Times : 33
ITU Version[0] : fe004452 ITU Version[1] : 41590000
ADSL Firmware Version : 05-07-02-08-00-01
Power Management Mode : DSL_G997_PMS_L0
Test Mode : DISABLE
-------------------------------- ATU-C Info ---------------------------------
Far Current Attenuation : 19 dB Far SNR Margin : 6 dB
CO ITU Version[0] : b5004946 CO ITU Version[1] : 544e827a
DSLAM CHIPSET VENDOR : < IFTN >
The pattern I am noticing each day is that at 5pm (to the minute!) the downstream/DS attainable rate starts quickly dropping to below the actual rate, often by 1Mbps below what was being reported during the day. At the same time the NE CRC/ES count to start to climb and over the next few hours the connection drops and retrains at a lower rate. The attainable rate continues to drop and the same thing often happens again with a further disconnect during the evening. Then during the night the attainable rate increases and early in the morning the connection drops and retrains to a higher rate, and the whole thing repeats at 5pm the next day when the attainable rate drops again.
Everything else is stable - attenuation, Cur SNR margin, and PSDs. I have seen a count of FE error counts, of 1, which clear after an hour or so. The only things that change are the attainable rates and the NE counts.
So it seems I have two processes interacting here - the drop in attainable rate each evening at 5pm, and the NE error counts (in the above example this is around 2 hours after the last retrain - no idea if the counts are low, high, or to be expected!) Sometimes the error count is low, a few 10s over an hour, but then starts to shoot up to a few 100s per hour.
I have a log of the connection drops and they seem to happen at relatively fixed periods between each other, which sounds more like the far end forcing the line drop and not my modem.
Based on all this does this sound like an issue my side of the master socket or on BTs side of things?
TIA
Mike
