Same 3 Repaeting Critical Errors in Event Log

Question

CM1150V, Firmware Version V4.02.02I keep getting the same 3 repeating Critical errors in the event log.&nbsp; About every 30 seconds.&nbsp; Inbound and Outbound lights are flashing Green.&nbsp; Any ideas what could be wrong?&nbsp; TIA, Curtis&nbsp;Thu Oct 22 15:56:41 2020Critical (3)16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;Thu Oct 22 15:56:41 2020Critical (3)Ranging Request Retries exhausted;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;Thu Oct 22 15:56:41 2020Critical (3)No Ranging Response received - T3 time-out;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;

jmoyta · Answer

I decided to add into this existing thread so as to reinforce that this exact same issue was occuring elsewhere, which may well indicate a systemic issue such as a firmware bug.&nbsp; My log entries and cable connection information is very nearly identical to those shared by cmarti02.&nbsp;My hope is that any advise offered toward resolution will be beneficial to anyone else having this same experience.&nbsp;For example, if we can discern that Firmware Version V4.02.02 was very recently pushed out by Comcast/Xfinity and if a prior known-good revision could be tested, I'm sure that would be beneficial to all involved.&nbsp;

plemans · Answer

do you have a screen snip of the cable connections page?
T3 errors tend to be line issues.

do you have any splitters, amplifiers, or attenuators in line? If so, remove them.

Check the coax for kinks, bad/old/poor/loose connections.

cmarti02 · Answer

Here are the screenshots of the cable connection.&nbsp; 5 attachments.There are no 'enhancers' attached.&nbsp; Checked connections.&nbsp;Thanks, Curtis

plemans · Answer

Your upstream power is low. You should be greater than 37dbmv. You should also have more locked channels. If the modem isn't communicating properly back to the cmts, you can have issues.

If you don't have any splitters, attenautors, amplifiers in line and the coax all looks good, then you'd need to check with the ISP.

cmarti02 · Answer

I probably should mention that before this issue started, neither of the VOIP lights were lit up on the CM1150V.&nbsp; Then two days ago, when this started, the VOIP1 light had been flashing Green. Could that have anything to do with it?&nbsp;I do have an old Thompson/RCA Voip box that has handled our home phone since we moved in.&nbsp; We live in boonies in NH, no cell service, so we kept it for 911 service primarily.&nbsp; I bought the Netgear modem about 18 months ago when Xfinity upgraded its service.&nbsp; I just hadn't set up the phone line for it since I have to run phone line thru walls to connect to new unit./clm

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Same 3 Repaeting Critical Errors in Event Log

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Thu Oct 22 15:56:41 2020	Critical (3)	16 consecutive T3 timeouts while trying to range on upstream channel 3;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;
Thu Oct 22 15:56:41 2020	Critical (3)	Ranging Request Retries exhausted;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;
Thu Oct 22 15:56:41 2020	Critical (3)	No Ranging Response received - T3 time-out;CM-MAC=28:80:88:00:e3:70;CMTS-MAC=18:8b:9d:d4:49:5d;CM-QOS=1.1;CM-VER=3.1;