Internet constantly goes down.

Question

I have chatted with support and they told me it was my equipment. I have previously already had four (4) Cox modems, all of which failed and had to be replaced. My last modem was self-purchased and worked fine until two months ago. According to chat support, I was told signals to my residence are great so it must be my equipment. After buying a modem/router from their approved list of equipment, I am still getting T3 and T4 timeouts and constant internet drops just like the 2 year old modem. I have only one cable line into my home with no splitters. I am at my wits end. Does anyone have any advice on what else to check (since all support can ever tell me is that it is my equipment which 4 out of the last 6 modems were their own leased modems)? The errors shown below occur all day. Please&nbsp;any help would be greatly appreciated.
Modem/Router Netgear C7000v2

2020-8-7, 15:28:52
Critical (3)
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=xxx:xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.1;CM-VER=3.0;

2020-8-7, 15:26:44
Critical (3)
Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=xx:xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.1;CM-VER=3.0;

2020-8-7, 15:25:57
Notice (6)
TLV-11 - unrecognized OID;CM-MAC=xx:xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.1;CM-VER=3.0;

2020-8-7, 15:25:54
Warning (5)
ToD request sent - No Response received;CM-MAC=xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.0;CM-VER=3.0;

2020-8-7, 15:25:54
Warning (5)
DHCP WARNING - Non-critical field invalid in response ;CM-MAC=xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.0;CM-VER=3.0;

2020-8-7, 15:25:51
Critical (3)
DHCP FAILED - Discover sent, no offer received;CM-MAC=xx;CMTS-MAC=00:38:df:9b:21:5d;CM-QOS=1.0;CM-VER=3.0;

viole · Answer

I have the same problem as you, I got a new modem as well and also have no splitters or amps on my cable line. The only thing I can think of to solve this problem is to contact customer support and hopefully get them to get a technician out to troubleshoot.&nbsp;

These are the event logs for my modem(Motorola MB8600)

&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
Dynamic Range Window violation

&nbsp;&nbsp;&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
Dynamic Range Window violation

&nbsp;&nbsp;&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
19:24:54Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
Dynamic Range Window violation

&nbsp;&nbsp;&nbsp;
19:59:28Fri Aug 7 2020
&nbsp;
Notice (6)
&nbsp;
CM-STATUS message sent. Event Type Code: 16; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 3.;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
20:00:39Fri Aug 7 2020
&nbsp;
Notice (6)
&nbsp;
CM-STATUS message sent. Event Type Code: 24; Chan ID: 159; DSID: N/A; MAC Addr: N/A; OFDM/OFDMA Profile ID: 0 1 2 3.;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
20:00:52Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
20:00:52Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
Dynamic Range Window violation

&nbsp;&nbsp;&nbsp;
20:04:30Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power Exceeds Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
20:04:30Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
Dynamic Range Window violation

&nbsp;&nbsp;&nbsp;
20:12:53Fri Aug 7 2020
&nbsp;
Critical (3)
&nbsp;
Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;

&nbsp;&nbsp;&nbsp;
20:12:53Fri Aug 7 2020
&nbsp;
Warning (5)
&nbsp;
RNG-RSP CCAP Commanded Power in Excess of 6 dB Below the Value Corresponding to the Top of the DRW;CM-MAC=00:40:36:5d:10:7e;CMTS-MAC=00:59:dc:79:0a:3c;CM-QOS=1.1;CM-VER=3.1;