Regular Visitor
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3 Messages
Dynamic Range Window violation - flaky connection from 2 to 5 PM
Hello. Since March, between 2 and maybe 5 PM, my cable modem loses connections. I'm now down to one splitter, from two, and it still happens. Re-booting the modem brings it back most of the time but then sometimes it drops again. I was using an Arris when these problems were happening but then switched to a Netgear C7000-100NAS but the problems persist. Here is a snapshot of today's log. Is the problem outside or inside of my house and what can be done?
Time | Priority | Description |
2020-9-19, 14:41:31 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:41:12 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:41:11 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:40:40 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:40:11 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:40:07 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:38:15 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:38:15 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:38:11 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:37:00 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:36:51 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:36:40 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:36:27 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:36:11 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:36:07 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:34:12 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:23:38 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:23:10 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:23:07 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:23:05 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:22:54 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:22:54 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:22:33 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:22:20 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:22:12 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:22:05 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:53 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:48 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:35 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:34 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:33 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:33 | Critical (3) | Unicast Ranging Received Abort Response - Re-initializing MAC;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:21 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:20 | Critical (3) | Received Response to Broadcast Maintenance Request, But no Unicast Maintenance opportunities received - T4 time out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:19 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:19 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:19 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:21:04 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
2020-9-19, 14:21:02 | Warning (5) | Dynamic Range Window violation |
2020-9-19, 14:20:54 | Critical (3) | Started Unicast Maintenance Ranging - No Response received - T3 time-out;CM-MAC=[Edited: "Personal Information"];CMTS-MAC=[Edited: "Personal Information"];CM-QOS=1.1;CM-VER=3.0; |
EG
Expert
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111.5K Messages
5 years ago
Please also post the *Downstream Power Level*, the *Upstream Power Level*, and the *SNR* (Signal to Noise Ratio) numbers.
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gary78rpm
Regular Visitor
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3 Messages
5 years ago
Thank you so much for your reply. Here is what things looked like today when my VPN dropped me. I didn't lose my Comcast network connection, though, but the Up-bound icon was flashing on the modem while these figures were collected:
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EG
Expert
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111.5K Messages
5 years ago
The downstream power is on the high side bit I'm not certain that that is the root cause of your issue. There is a good amount of correctable bit errors on many of the downstream channels but that should not be a problem as they have been corrected / neutralized. The uncorrectables are practically non-existent.
There is a greater than 6 dB difference in upstream channels 3 and 4. It should be only 2 to 3 dB. That typically is the cause of this error;
Dynamic Range Window violation
I don't think that you will be able to correct this problem. It may be best to get a tech out to investigate and correct this. Good luck with it !
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gary78rpm
Regular Visitor
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3 Messages
5 years ago
The Comcast tech that came out said the same thing. On our 4 house junction box he cut an unused line to my neighbor's house and added two terminators where none had been before. Then he gave me a splitter to put inside the house to lower the signal. No problems since! Thank you for your insights! Gary
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