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New Contributor
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Connection suddenly dropping, modem levels/channels wildly different
Noticed yesterday things were a bit slower than usual. This afternoon the modem was dropping in and out. SB6121 prior to today usually had 3 bonded channels with an upstream power level about -45.
Rebooted with no measurable effect. Moved the modem from its dedicated line to the tv line in the other room where it actually reconnected with one channel and upstream about -49. back to dedicated line and again connected with one channel and -49 upstream.
Here is the signal info currently:
| Downstream | Bonding Channel Value | |
|---|---|---|
| Channel ID | 229 | |
| Frequency | 849000000 Hz | |
| Signal to Noise Ratio | 30 dB | |
| Downstream Modulation | QAM256 | |
Power Level
|
-10 dBmV |
| Upstream | Bonding Channel Value |
|---|---|
| Channel ID | 4 |
| Frequency | 28700000 Hz |
| Ranging Service ID | 1 |
| Symbol Rate | 2.560 Msym/sec |
| Power Level | 49 dBmV |
| Upstream Modulation | [3] QPSK [5] 16QAM |
| Ranging Status | Success |
| Signal Stats (Codewords) | Bonding Channel Value |
|---|---|
| Channel ID | 229 |
| Total Unerrored Codewords | 33765561 |
| Total Correctable Codewords | 71714 |
| Total Uncorrectable Codewords | 95551 |
| Mar 25 2012 15:12:59 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0; |
| Mar 25 2012 15:12:56 | 5-Warning | D04.1 | ToD request sent - No Response received;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0; |
| Mar 25 2012 15:12:33 | 5-Warning | T203.0 | MDD message timeout;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0; |
| Mar 25 2012 15:12:17 | 6-Notice | I401.0 | TLV-11 - unrecognized OID;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0; |
| Jan 01 1970 00:00:35 | 3-Critical | R02.0 | No Ranging Response received - T3 time-out;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0; |
| Jan 01 1970 00:00:14 | 6-Notice | Cable Modem Reboot due to power reset ;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; |
Last time this happened had a neighbor that nicked the line running through her yard. The phone and tv suffered noticeably, this time still have tv and phone (plus neighbor moved out months ago, house still vacant).
Hoping there's an easy answer like cox is working in the area. perhaps its a sb6121 issue like the other poster?
Thanks in advance
okcfrazier
New Contributor
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reconnected everything and back to 3 channels but still getting forced reboots, log from last reboot moments ago
SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=e4:83:99:76:b4:9c;CMTS-MAC=00:1a:2f:8a:e6:77;CM-QOS=1.1;CM-VER=3.0;
current signal info
[5] 16QAM
917
even the cox speedtest shows varying results, there is an obvious lag during the test most times.
Net
Speed
Speed
Address
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okcfrazier
New Contributor
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another self reboot, noticed the 230 channel dropping in and out before it all shut down
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okcfrazier
New Contributor
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yet another auto reboot, less than 10 minutes of connectivity this time. about 3 cycles before it synced.
at this point back to a single channel
[5] 16QAM
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okcfrazier
New Contributor
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loss of connectivity without auto reset so powered it off and back on, almost instantly upon connection auto booted again
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ChrisL
Former Moderator
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Signal quality being reported by the modem is extremeley poor which is the likely explanation for the issues you're seeing. I would trying bypassing any cable splitters you can and/or checking your cables/fittings for any obvious problems. Beyond that a service call may be required to investgiate further.
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okcfrazier
New Contributor
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no splitter on the modem end, line comes out of the ground and into the cox box where I assume it is split to the tv line and the separately installed modem line. nothing changed at all indoors until the problems started and now its all back.
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