Frequent "No Ranging Response received - T3 time-out"

Hi there,

For the past couple months, my Internet has been dropping connection due to frequent “T3 time-out”.

These drops are happening around 1 to 4 times a day. Researching a bit, the cable comes from the line outside and is split once between upstairs and downstairs. From there, the downstairs is straight routed to the modem. I’ve checked all connections and none are loose.

I’ve copied the logs and power levels below.

Any and all help would be greatly appreciated. Thanks
Time Priority Code Message
Apr 14 2020 10:23:24 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Apr 14 2020 08:48:09 5-Warning Z00.0 MIMO Event MIMO: Stored MIMO=-1 post cfg file CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Jan 01 1970 00:00:18 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;
Apr 14 2020 04:34:21 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Apr 13 2020 05:52:10 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 00:00:18 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;
Apr 12 2020 14:51:45 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 00:00:18 6-Notice N/A Cable Modem Reboot due to power reset ;CM-MAC=;CMTS-MAC=;CM-QOS=1.1;CM-VER=3.0;
Apr 11 2020 11:09:33 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 00:00:18 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;
Apr 08 2020 07:11:00 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



Power Levels:
Downstream Bonding Channel Value
Channel ID 17 18 19 20 21 22 23 24
Frequency 549000000 Hz 555000000 Hz 561000000 Hz 567000000 Hz 573000000 Hz 579000000 Hz 585000000 Hz 591000000 Hz
Signal to Noise Ratio 38 dB 38 dB 39 dB 37 dB 39 dB 38 dB 38 dB 39 dB
Downstream Modulation QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256 QAM256
Power Level -2 dBmV -2 dBmV -2 dBmV -2 dBmV -3 dBmV -2 dBmV -3 dBmV -3 dBmV

Upstream Bonding Channel Value
Channel ID 1 4 3 2
Frequency 38800000 Hz 19600000 Hz 26000000 Hz 32400000 Hz
Ranging Service ID 2060 2060 2060 2060
Symbol Rate 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec 5.120 Msym/sec
Power Level 46 dBmV 45 dBmV 45 dBmV 45 dBmV
Upstream Modulation [2] QPSK
[1] 16QAM
[3] 64QAM [2] QPSK
[1] 16QAM
[3] 64QAM [2] QPSK
[1] 16QAM
[3] 64QAM [2] QPSK
[1] 16QAM
[3] 64QAM
Ranging Status Success Success Success Success