|reply to scififan68 |
Re: Defective SB6141 Modem?
I bought a second SB6141 to try out and I just had a T3 timeout with jump in uncorrectable errors by millions. "Nov 23 2012 04:09:27 3-Critical R02.0 No Ranging Response received - T3 time-out"
This isn't the first error I've had with this modem, I did have a drop in the internet with these errors:
"Jan 01 1970 00:00:14 6-Notice Cable Modem Reboot due to T4 timeout
Nov 14 2012 21:58:45 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted
Nov 14 2012 21:58:45 3-Critical R03.0 Ranging Request Retries exhausted
Nov 14 2012 21:58:43 3-Critical R02.0 No Ranging Response received - T3 time-out"
I've looked up those and I believe it was noise on the upstream that caused the drop. I called tier 3 about that and they said my signal is fine, but they saw a bit of a drop, and to call them if I have any other issues. That was 9 days ago, and what I'm wondering what is causing these big jumps in errors, enough to cause a T3 timeout. My signal is fine and doesn't move around more than 3db. Should I be worried or am I worrying too much?
Edit: I know that the % of errors vs total codewords is pretty small, so I shouldn't worry at all? T3's only cause drops when you have many of them, but I'm trying to determine if I should return this modem or keep it.
I just activated a new SB6141 and am getting T3 timouts on any upload over about 2mbps for more than a few minutes. I've spent a few hours on the phone with L3 and finally managed to convince one that there was an issue. I only get 1 T3 timeout in my logs per disconnect. The modem recovers in a minute.
Signal levels are fine. All 4 bonded downstream channels show a snr of 36-37dB, power is 0-1dBmV. My upstream is 48dBmV. There is very little fluctuation in the numbers at all. None of the techs I've talked to have seen anything at all wrong signal-wise but I have a truck roll scheduled for Sunday morning.
I haven't any disconnects since 9 days ago, but the correctable and uncorrectable errors are climbing, a few channels have over a million more errors. Whats funny is that my internet speeds are fine and nothing disconnecting right now, but you never know.