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3 Posts

Friday, January 23rd, 2026

Internet dropping out randomly since move in 12/08/2025

Internet dropping out randomly since move in 12/08/2025.  The only work around is to reboot my modem. I keep getting these logs in my modem: 

Date Time    Event Level    Description
18/1/2026
13:00:11    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
18/1/2026
13:28:08    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
18/1/2026
13:32:53    3    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
18/1/2026
13:34:58    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
18/1/2026
14:12:50    3    Resetting the cable modem due to docsDevResetNow
31/12/1969
18:00:17    3    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:34    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
18/1/2026
14:16:03    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
08:44:28    3    REG RSP not received;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
08:44:37    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:23    3    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:46    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:02:44    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:23    3    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:41    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:05:12    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:06:54    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:43:43    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:45:54    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
19/1/2026
11:48:06    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
31/12/1969
18:00:23    3    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
07:59:30    3    REG RSP not received;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
07:59:39    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:01:19    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:02:09    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:03:49    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:05:19    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:06:09    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:09:49    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:10:18    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:10:49    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:21:57    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:26:48    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:35:58    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:36:16    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:38:06    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:39:17    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:46:46    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:55:14    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
08:59:44    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
09:06:53    3    Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
09:14:43    3    Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:03:52    6    TLV-11 - unrecognized OID;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:03:58    6    DS profile assignment change. DS Chan ID: 32; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:03:59    6    DS profile assignment change. DS Chan ID: 33; Previous Profile: ; New Profile: 1 2 3.;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:04    5    REG-RSP-MP Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:06    5    RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:06    5    Dynamic Range Window violation
23/1/2026
14:04:07    5    RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:07    5    Dynamic Range Window violation
23/1/2026
14:04:07    3    No Ranging Response received - T3 time-out;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:07    5    RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:04:07    5    Dynamic Range Window violation
23/1/2026
14:05:46    3    SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;
23/1/2026
14:05:51    5    DBC-REQ Mismatch Between Calculated Value for P1.6hi Compared to CCAP Provided Value;CM-MAC=b0:da:f9:12:36:99;CMTS-MAC=44:ae:25:f6:78:f1;CM-QOS=1.1;CM-VER=3.1;

I've tried replacing my modem and router, because I have a spares.   Any Idea what the best way for me to communicate the issue is with the either to coax cable to my house or COX's neighborhood CMTS?  I have COX sending me their modem router combo to eliminate any possibility of network equipment, but I'm going to have a COX technician come out shortly there after to resolve the issue.

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Visitor

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3 Posts

2 months ago

Note: I have checked all my connections are tight and I have a backup UPS for my router modem and I don't have any splitters. 

Moderator

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471 Posts

Hi danswiss1777,

We are more than happy to check your equipment diagnostics remotely. Please email us at cox.help@cox.com with your service address so that we may assist you further.  We look forward to working with you.  
-Latitia

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