justbits
More fiber than ATT can handle
Premium
join:2003-01-08
Chicago, IL
 ·AT&T Midwest
·AT&T Yahoo
| reply to swflutka
Re: Any 5100b technician page DMT/SNR data experts?
said by swflutka  :One thing that I see is that your modem is synced at 2464/512. Did you have them bump you back up or did they never reduce your sync to 768/364. Have you tried getting set to an interleaved profile? Before I had a home run, the best the modem could do was 2464/512. After the homerun, I could do 3000/512. A temporary solution to the problem was to see if the problem still occurred at 2464/512 after the homerun was in place. It still did. Over time, the modem was daily syncing at slower speeds. It started at 2.6/512, then 2.4/512, then 2.0/512, then 1.9/512, then 1.8/512. For a while, it wouldn't sync higher than 1.8/512 unless I rebooted the 5360 modem.
An interleaved profile was tried. 1.5/384 INTL:G.dmt. Ping times went from 11ms to 54ms. The problem still occurred.
Here's some more history.
The problem occurs with 5100b firmware 1.0.0.36 and 1.0.0.39.
There are no remote terminals. I've been told that no RT is planned so it's not like they're in the middle of cutting in a RT.
The SBC provided Speedstream 5360 would fail to sync for the entire 30-45 minute duration that the failure was occurring. I think the problem duration is exactly 30 or 45 minutes. A SBC 5100b 5100b I borrowed from my brother drops sync, but then is able to resync 30 seconds to 5 minutes later at a lower sync rate. After the problem is over, the 5360 and 5100b were able to sync at full speed. To clear up the "jagged lines" graphs, all I have to do is power cycle the modem or force the modem to resync.
--justbits |
