This has been happening for months--the connection cuts out for around 30 seconds while the modem reconnects. You can see the modem's not connected by visiting the status page or watching as all the lights on the modem except power flash off and come back on as it reconnects. I originally had my own modem and replaced with a Spectrum supplied modem and that didn't help. A technician has also come out and redid some wiring but that didn't help either. The modem was originally in a surge protector and now a UPS but still has issues. Other devices on the same power source have never had problems.
Modem pages https://imgur.com/a/pn1pk
Just like in this post https://forums.timewarnercable.com/t5/Connectivity/Help-Modem-reboots-may-times-per-day/m-p/145847 the times in the error log don't correspond to restarts. This seems unique to the TM1602 as my SB6121 I was using before seemed to be logging things when the connection dropped
You can see it's only been up 19 minutes (just restarted) and there's nothing in the log
You may have networking hardware issues too, likely do. But there's two things that I question here from a physical plant stand point.
Do you have cable boxes too or is this only an internet modem?
-> If there's cable boxes,
then we need to come out and re-arrange the splitters or add a good-quality unity-gain (no loss, no gain) amp.
-> If there's no cable boxes,
then why the heck is your Rx/Forward/Downstream power only -3's dBmV?! What's needed is to remove whatever splitters are there. If you have splitters that go to nothing -- just open ports on splitters or random unused wires attached -- then that's just a source of noise (which negatively affects internet, b/c it mostly affect low frequencies, which are used for upstream)
3 dB difference between the lowest frequency of the upstream/return/Tx (19.4 MHz) and the highest frequency of the upstream/return/Tx (37 MHz) is a bit too much tilt.
Thus, there's some maintenance tech fine-tuning to do here as well. A 3 dB tilt isn't going to cause this issue, but it's indicative that a street amp or LE is (or even the node's fiber optic) is a bit offset somewhere on the outside plant. Think of it like an early warning sign, not a cause of the problem but something we'd like to get fixed. In other words, it's "non-impacting", but has room to be fixed/improved.
Couldn't figure out how to factory reset this model but I'll play around more tonight. We use AT&T and Verizon but I suppose somewhere in a neighboring unit could have lots of T-Mobile gear. The equipment is in a spare bedroom
Here's the reason for the splitter https://www.reddit.com/r/HomeNetworking/comments/7554i3/modem_periodically_restarting/
The tech that came out replaced it with a higher quality one and capped the open port. Only a single modem--no cable boxes. I don't think there are any other splitters on the way to the outside of the apartment but I don't have a lot of visibility into the wiring.
What's meant by networking hardware issues? It's the same stack working for a year at a different address and a very similar setup to my parents house. The connection works flawlessly--it just drops when the modem periodically resets.
It reset again and this showed up in the log this time
|1/11/2018 9:06||73040200||3||TLV-11 - Illegal Set operation failed;CM-MAC=2c:7e:81:c3:18:20;CMTS-MAC=00:01:5c:8b:6c:64;CM-QOS=1.1;CM-VER=3.0;|