Just moved into a new house with Cox 300mbps. Constant T3 T4 errors and modem resets

Question

Hi,

So the modem upstream light begins blinking green and then the internet will temporarily shut down and then come back up. This happens 5-10 times a day especially while streaming video of any kind, and video will freeze/buffer and games will lagspike like crazy, etc. When looking at&nbsp;192.168.100.1/&nbsp;around the time that this happens I can see that the usual 4 upstream channels are not there and there will only be 1 or 2, and eventually all four will come back.
Main Errors in the log that appear with frequency:

Unicast ranging received abort response
Dynamic Range Window Violation
Started Unicast ranging Ranging- No response received T3 timeout
Received Response to Broadcast Maintenance Request but no unicast maintenance opportunities received T4 timeout

I have a new C7000v2 modem/router

2020-2-8, 00:49:56
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 00:50:01
Warning (5)
Dynamic Range Window violation

2020-2-8, 00:50:29
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 00:52:19
Warning (5)
Dynamic Range Window violation

2020-2-8, 00:54:22
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 00:54:22
Warning (5)
Dynamic Range Window violation

2020-2-8, 00:54:37
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 00:54:40
Warning (5)
Dynamic Range Window violation

2020-2-8, 00:55:09
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 00:55:39
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:23:32
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:23:32
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:23:34
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:23:34
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:23:37
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:23:37
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:23:39
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:23:40
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:24:12
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:24:43
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:24:51
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:00
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:01
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:04
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:04
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:06
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:06
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:15
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:20
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:35
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:38
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:39
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:25:48
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:25:59
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:26:08
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:26:09
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:26:15
Critical (3)
Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:26:19
Warning (5)
Dynamic Range Window violation

2020-2-8, 04:26:48
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;

2020-2-8, 04:26:48
Warning (5)

Dynamic Range Window violation

Downstream Bonded Channels

Channel
Lock Status
Modulation
Channel ID
Frequency
Power
SNR
Correctables
Uncorrectables

1
Locked
QAM256
1
783000000 Hz
-4.4 dBmV
37.4 dB
140
355

2
Locked
QAM256
33
405000000 Hz
-2 dBmV
39.1 dB
559
548

3
Locked
QAM256
2
789000000 Hz
-4.6 dBmV
37.3 dB
135
253

4
Locked
QAM256
3
795000000 Hz
-5 dBmV
37.1 dB
126
407

5
Locked
QAM256
4
801000000 Hz
-4.9 dBmV
36.9 dB
121
371

6
Locked
QAM256
5
807000000 Hz
-4.6 dBmV
37.2 dB
129
346

7
Locked
QAM256
6
813000000 Hz
-4.6 dBmV
37.1 dB
92
238

8
Locked
QAM256
7
819000000 Hz
-4.8 dBmV
36.9 dB
94
168

9
Locked
QAM256
8
825000000 Hz
-5 dBmV
36.6 dB
114
279

10
Locked
QAM256
17
879000000 Hz
-3.5 dBmV
37.3 dB
82
257

11
Locked
QAM256
18
885000000 Hz
-3.2 dBmV
37.5 dB
82
234

12
Locked
QAM256
19
891000000 Hz
-3.3 dBmV
37.5 dB
108
349

13
Locked
QAM256
20
897000000 Hz
-3.2 dBmV
37.4 dB
95
222

14
Locked
QAM256
21
903000000 Hz
-3.4 dBmV
37.3 dB
71
292

15
Locked
QAM256
22
909000000 Hz
-3.2 dBmV
37.4 dB
88
325

16
Locked
QAM256
23
915000000 Hz
-3.4 dBmV
37.2 dB
120
252

17
Locked
QAM256
24
921000000 Hz
-4.3 dBmV
36.8 dB
0
0

18
Locked
QAM256
34
411000000 Hz
-2.8 dBmV
38.1 dB
0
0

19
Locked
QAM256
35
417000000 Hz
-2.6 dBmV
38 dB
0
0

20
Locked
QAM256
36
423000000 Hz
-3 dBmV
37.5 dB
0
0

21
Locked
QAM256
37
429000000 Hz
-2.5 dBmV
37.6 dB
0
0

22
Locked
QAM256
38
435000000 Hz
-2.5 dBmV
37.5 dB
0
0

23
Locked
QAM256
39
441000000 Hz
-2.1 dBmV
38.1 dB
0
0

24
Locked
QAM256
40
447000000 Hz
-1.8 dBmV
38.2 dB
0
0

&nbsp;

Upstream Bonded Channels

Channel
Lock Status
US Channel Type
Channel ID
Symbol Rate
Frequency
Power

1
Locked
ATDMA
1
5120 Ksym/sec
17600000 Hz
35.6 dBmV

2
Locked
ATDMA
2
5120 Ksym/sec
24000000 Hz
37.3 dBmV

3
Locked
ATDMA
3
5120 Ksym/sec
30400000 Hz
38.4 dBmV

4
Locked
ATDMA
4
5120 Ksym/sec
36800000 Hz
38.6 dBmV

5
Not Locked
Unknown
0
0 Ksym/sec
0 Hz
0.0 dBmV

6
Not Locked
Unknown
0
0 Ksym/sec
0 Hz
0.0 dBmV

7
Not Locked
Unknown
0
0 Ksym/sec
0 Hz
0.0 dBmV

8
Not Locked
Unknown
0
0 Ksym/sec
0 Hz
0.0 dBmV

From what I understand my SNR and power levels are ok, but not sure. When these problems happen there will only be 1 or 2 upstream channels and the power level will be 40+ though as opposed to the 4 shown here

brianm · Answer

Judging by the recent modem history we will likely need a technician out to the home. Short of that, make sure you have bypassed any possible splitters/checked connection for tightness etc.

Brian
Cox Support Forum Moderator

Forum Discussion

Just moved into a new house with Cox 300mbps. Constant T3 T4 errors and modem resets

1 Reply

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2020-2-8, 00:49:56	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 00:50:01	Warning (5)	Dynamic Range Window violation
2020-2-8, 00:50:29	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 00:52:19	Warning (5)	Dynamic Range Window violation
2020-2-8, 00:54:22	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 00:54:22	Warning (5)	Dynamic Range Window violation
2020-2-8, 00:54:37	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 00:54:40	Warning (5)	Dynamic Range Window violation
2020-2-8, 00:55:09	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 00:55:39	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:23:32	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:23:32	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:23:34	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:23:34	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:23:37	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:23:37	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:23:39	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:23:40	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:24:12	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:24:43	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:24:51	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:00	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:01	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:04	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:04	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:06	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:06	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:15	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:20	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:35	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:38	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:39	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:25:48	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:25:59	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:26:08	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:26:09	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:26:15	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:26:19	Warning (5)	Dynamic Range Window violation
2020-2-8, 04:26:48	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=;CMTS-MAC=00:27:90:0d:56:41;CM-QOS=1.1;CM-VER=3.0;
2020-2-8, 04:26:48	Warning (5)	Dynamic Range Window violation