Internet Drops, Power cycle fixes it, no errors in modem log???

Hello

I am having an issue where my internet connection drops out periodically, once every 3-5hrs.

It will only come back if i power cycle the cable modem. Strangely, power cycling the modem sometimes affects my htcp. Twice now i have had to reset the htcp in order to get tv back after cycling the modem.

The htcp and modem are on dedicated coax lines back to an active return amp/splitter.


I checked the db level upstream, downstream, as well as the signal to noise ratio and they are all within acceptable ranges.


I had a tech from the cable company out today, and he suggested it was my cable amp that was causing the issue, so he bypassed it for the modem.

I was using a remote desktop application tonight, had closed it, and then wam! No internet. I power cycled the modem, then wam! No tv. I power cycled the htcp and now i have both again.


Any ideas?

My service provider is cox


Modem stats:

motorola surfboard sb6121


Downstream Bonding Channel Value
Channel ID 25 26 27 28
Frequency 543000000 Hz 549000000 Hz 555000000 Hz 561000000 Hz
Signal to Noise Ratio 36 dB 37 dB 37 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
3 dBmV 4 dBmV 4 dBmV 5 dBmV
Upstream Bonding Channel Value
Channel ID 3 1 2 4
Frequency 28202000 Hz 20202000 Hz 23402000 Hz 35102000 Hz
Ranging Service ID 3141 3141 3141 3141
Symbol Rate 5.120 Msym/sec 2.560 Msym/sec 2.560 Msym/sec 5.120 Msym/sec
Power Level 48 dBmV 46 dBmV 48 dBmV 49 dBmV
Upstream Modulation [3] 16QAM
[3] 64QAM
[3] QPSK
[2] 16QAM
[3] 64QAM
[3] QPSK
[2] 16QAM
[3] 64QAM
[3] 16QAM
[3] 64QAM

Ranging Status Success Success Success Success
Signal Stats (Codewords) Bonding Channel Value
Channel ID 25 26 27 28
Total Unerrored Codewords 71122309 70393879 70394059 70394150
Total Correctable Codewords 60 10 9 6




Jul 07 2014 22:01:38 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 22:01:38 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;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=3c:36:e4:a4:b6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:59:53 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:59:53 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:58:26 3-Critical R04.0 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:56:58 5-Warning T202.0 Lost MDD Timeout;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:56:34 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:21:37 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:21:37 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;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=3c:36:e4:a4:b6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:20:53 6-Notice I401.0 TLV-11 - unrecognized OID;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 18:20:53 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file MIMO=-1;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:26:04 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:13 6-Notice N/A Cable Modem Reboot due to T4 timeout ;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 17:54:22 3-Critical R04.0 Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 17:53:00 5-Warning T202.0 Lost MDD Timeout;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;
Jul 07 2014 17:52:35 3-Critical T05.0 SYNC Timing Synchronization failure - Loss of Sync;CM-MAC=3c:36:e4:a4:b6:88;CMTS-MAC=e0:2f:6d:6d:16:62;CM-QOS=1.1;CM-VER=3.0;