Yesterday I had been playing a game online for a couple of hours as well as VOIP chatting. Suddenly it started to storm really bad which included very high winds and it had gotten extremely cold. I then started dropping my internet. It would work for a few minutes and then drop again. I called Comcast and had them send a restart signal. That did not work. I then started restarting all of my hardware. I ultimately eliminated everything but the modem. Nothing had worked. That went on for 9 hours. I called Comcast multiple times throughout the process. I ultimately had a tech come out and look at it the next day.
The tech just left and he said that the line signal was too high. He put an inline thing on the cable to lessen it by 10db. We checked the internet and it seemed stable. My modem would T4 error constantly before, now I only lost connection a couple of times within a 15 minute period. Comcast recently increased my DL speeds from 50mbps to 120 or so. We did some checks and everything seemed fine on his devices, so I decided to run a speed test through 3 different places. The upload speeds were less than 1mbps. It was terrible. He went out and scanned some more stuff and came in stating that he saw my modem reset while he was outside. I said that I didnt notice it.
At that point the said it was most likely the modem because when he manually resets the unit, it will turn on and initialize, then turn off again and then back on before becoming stable. I had a SB6141 and he suggested to get a new modem. He left and told me that he was dead all day and that they should be able to have him do a same day return if needed.
I went to Walmart and picked up a SB6121 and called to have it provisioned. We then checked the upload speed and it was only 2.6mbps. She kept sending reset signals to my modem and we ultimately got it to around 3.6mbps. I asked if she could have someone come back out today and she said the earliest possible was in a week. I refused and told her that the tech said he had nothing for the rest of the day and to request in the notes to have him come back out. She then told me one was available tomorrow. She sent one last reset and we got the same results back, so we ended the call.
I have run some tests following the How To Get Comcast Help Guide, so, I am hoping that you are able to help me. I am able to receive 15mpbs in my area and as of a couple of days ago I was gettings about 18mbps Upstream. I feel that the weather had something to do with it. Perhaps any info that I get here will better help the technician pinpoint the issue so that I have a consistent connection.
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- Clinton, UT
- Model Name: SB6121
Vendor Name: Motorola
Firmware Name: SB_KOMODO-1.0.6.14-SCM01-NOSH
Boot Version: PSPU-Boot(25CLK) 1.0.12.18m3
Hardware Version: 5.0
Firmware Build Time: Mar 6 2014 15:23:55
- We will leave the wired TpLink Router and two Dlink 8-port switches out of the equation as I know now that they are not the root of the problem and I am running my PC directly to the modem.
- Comcast Blast 50/15 (recently upgraded as of 12/16/14 from them to double my DL speeds)
- Speed Test = 13ms 38mbps Down and 128K Up (ran on latest Chrome, FF and IE)
- DiffProbe Results:
DiffProbe release. January 2012. Build 1008.
Shaper Detection Module.
Connected to server 83.212.4.11.
Estimating capacity:
Upstream: 1009 Kbps.
Downstream: 133821 Kbps.
The measurement will take upto 6.0 minutes. Please wait.
Checking for traffic shapers:
Upstream: Measurement aborted due to high packet loss rate.
Downstream: No shaper detected.
Median received rate: 122154 Kbps.
- Modem Signal Levels:
--Downstream-- --Bonding Channel Value--
Channel ID 2 6 8 9
Frequency 561000000 Hz 585000000 Hz 597000000 Hz 603000000 Hz
Signal to Noise Ratio 36 dB 37 dB 38 dB 38 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256
Power Level
The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading
5 dBmV 6 dBmV 6 dBmV 6 dBmV
____________________________________________________________________
--Upstream-- --Bonding Channel Value--
Channel ID 10 11 12
Frequency 22600000 Hz 29000000 Hz 35400000 Hz
Ranging Service ID 13340 13340 13340
Symbol Rate 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec
Power Level 49 dBmV 49 dBmV 49 dBmV
Upstream Modulation [3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM
[3] QPSK
[3] 64QAM
Ranging Status Success Success Success
_____________________________________________________________________
Signal Stats (Codewords) --Bonding Channel Value--
Channel ID 2 6 8 9
Total Unerrored Codewords 1893700939 1893701304 1893701317 1901948537
Total Correctable Codewords 528 493 557 561
Total Uncorrectable Codewords 22138 16173 16559 24421
- Modem Logs
Dec 30 2014 23:28:04 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 21:58:19 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 16:10:22 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 16:10:18 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 16:05:37 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:49:01 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:49:01 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:27 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to IP loss ;CM-MAC=#########;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:44:22 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:44:22 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=a4:7a:a4:7c:32:68;CMTS-MAC=00:01:5c:6b:02:48;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:21 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:14 6-Notice N/A Cable Modem Reboot due to IP loss ;CM-MAC=#########;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:41:02 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:34:18 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:34:17 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=#########;CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:20 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########;CMTS-MAC=0#########;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=#########;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Dec 30 2014 15:31:55 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=#########CMTS-MAC=#########;CM-QOS=1.1;CM-VER=3.0;
- Ping Test
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/pingt ··· /3281635Also, sorry for any bad formatting, I can not take screen shots on my computer for some reason. I did the best i could.
