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Cable internet connection dropping with SYNC Timing Synchronization failure

Hello,

Approximately six months (maybe a year?) ago I had Cox service installed. My router is the Netgear Wireless Cable Gateway CG3000DV2. The past week my internet connection has dropped with the following errors. Please provide insight.

In case it helps, I live in a highrise. The connection comes in from the hallway and I have one splitter to split the line for internet and television.

Thanks!

Time Priority Description
 Tue Jun 16 17:29:27 2015    Notice (6)   WiFi Interface [wl0] set to Channel 1 (Side-Band Channel:N/A) - Reason:INIT 
 Tue Jun 16 17:28:45 2015    Notice (6)   TLV-11 - unrecognized OID;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Tue Jun 16 17:21:09 2015    Critical (3)   Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:19:33 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:57 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:55 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:54 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:52 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:48 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:46 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:42 2015    Critical (3)   Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:18:18 2015    Critical (3)   Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.0;CM-VER=3.0; 
 Tue Jun 16 17:15:29 2015    Critical (3)   Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Tue Jun 16 12:54:13 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:23 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Sat Jun 13 11:01:15 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:15 2015    Critical (3)   Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:13 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:09 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:08 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:06 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:04 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:01:01 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:00:59 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:00:57 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:00:55 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Sat Jun 13 11:00:52 2015    Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.1;CM-VER=3.0; 
 Time Not Established   Warning (5)   DHCP WARNING - Non-critical field invalid in response ;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=c4:71:fe:73:ef:c7;CM-QOS=1.0;CM-VER=3.0; 
 Time Not Established   Notice (6)   Honoring MDD; IP provisioning mode = IPv4 
 Time Not Established   Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Time Not Established   Critical (3)   SYNC Timing Synchronization failure - Failed to acquire FEC framing;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 
 Time Not Established   Critical (3)   SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing;;CM-MAC=6c:b0:ce:55:34:70;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.0;CM-VER=3.0; 

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@Shuli

I looked at the modem from here and it's currently reporting a transmit power level well out of specification.  Are there any extra cable splitters you can try removing to see if the signal improves?

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