Getting T3/T4 modem errors

Question

My internet connection is constantly dropping and started within the last couple of weeks. Based on the data it seems like the issue is on the Xfinity side.

Modem: Netgear CM500-100NAS

Startup Procedure

Procedure	Status	Comment
Acquire Downstream Channel	495000000 Hz	Locked
Connectivity State	OK	Operational
Boot State	OK	Operational
Security	Enabled	BPI+
IP Provisioning Mode	Honor MDD	honorMdd(4)

Downstream Bonded Channels

Channel	Lock Status	Modulation	Channel ID	Frequency	Power	SNR	Correctables	Uncorrectables
1	Locked	QAM256	13	495000000 Hz	-0.6 dBmV	40.1 dB	39	126
2	Locked	QAM256	1	423000000 Hz	-0.3 dBmV	40.5 dB	149	95
3	Locked	QAM256	2	429000000 Hz	-0.1 dBmV	40.6 dB	94	183
4	Locked	QAM256	3	435000000 Hz	0 dBmV	40.6 dB	92	276
5	Locked	QAM256	4	441000000 Hz	0.1 dBmV	40.6 dB	86	74
6	Locked	QAM256	5	447000000 Hz	0.2 dBmV	40.6 dB	98	152
7	Locked	QAM256	6	453000000 Hz	0.2 dBmV	40.6 dB	112	135
8	Locked	QAM256	7	459000000 Hz	0.3 dBmV	40.6 dB	101	126
9	Locked	QAM256	8	465000000 Hz	0.2 dBmV	40.5 dB	109	91
10	Locked	QAM256	9	471000000 Hz	0 dBmV	40.5 dB	81	56
11	Locked	QAM256	10	477000000 Hz	-0.1 dBmV	40.4 dB	97	142
12	Locked	QAM256	11	483000000 Hz	-0.4 dBmV	40.3 dB	45	89
13	Locked	QAM256	12	489000000 Hz	-0.6 dBmV	40.2 dB	63	148
14	Locked	QAM256	14	507000000 Hz	-0.8 dBmV	39.5 dB	24	110
15	Locked	QAM256	15	513000000 Hz	-0.7 dBmV	40.1 dB	20	104
16	Locked	QAM256	16	519000000 Hz	-0.7 dBmV	40 dB	30	122

Upstream Bonded Channels

Channel	Lock Status	US Channel Type	Channel ID	Symbol Rate	Frequency	Power
1	Locked	ATDMA	8	5120 Ksym/sec	18600000 Hz	37.9 dBmV
2	Locked	ATDMA	5	5120 Ksym/sec	37800000 Hz	36.7 dBmV
3	Locked	ATDMA	6	5120 Ksym/sec	31400000 Hz	38.4 dBmV
4	Locked	ATDMA	7	5120 Ksym/sec	25000000 Hz	39 dBmV

Extended Upstream Transmit Power

Enable Extended Upstream Transmit Power

Current System Time:Tue Aug 18 09:10:28 2020

System Up Time:01:30:43

Time	Priority	Description
2020-8-18, 09:06:46	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:06:13	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:05:05	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:04:32	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:04:07	Warning (5)	Dynamic Range Window violation
2020-8-18, 09:04:06	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:03:34	Warning (5)	Dynamic Range Window violation
2020-8-18, 09:03:34	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:02:47	Warning (5)	Dynamic Range Window violation
2020-8-18, 09:02:46	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:02:18	Warning (5)	Dynamic Range Window violation
2020-8-18, 09:02:14	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 09:01:57	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:53:31	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:53:18	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:52:58	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:52:26	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:44:34	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:34:09	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:33:40	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:33:37	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:33:20	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:25:10	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:25:03	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:24:57	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:24:50	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:24:50	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:24:38	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:24:37	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:24:18	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:24:17	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:23:21	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:23:17	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:23:01	Critical (3)	Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:23:01	Warning (5)	Unicast DSID PSN startup error
2020-8-18, 08:22:21	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:22:18	Critical (3)	Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:21:42	Warning (5)	Dynamic Range Window violation
2020-8-18, 08:21:33	Critical (3)	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=28:80:88:c5:70:08;CMTS-MAC=00:fe:c8:06:02:41;CM-QOS=1.1;CM-VER=3.0;
2020-8-18, 08:21:21	Warning (5)	Dynamic Range Window violation

Your Home Network

angrick12

Getting T3/T4 modem errors

Responses

No Responses!

New to the Community?