Intermittent Internet Service with constant T3 Errors

There is something intermittent going on with the connectivity. Some stuff that you can try;

In an effort to try to obtain better connectivity, check to see if there are any excess/unneeded coax cable splitters in the line leading to the modem that can be eliminated/re-configured. Any splitters that remain should be high quality and cable rated for 5-1002 MHz, bi-directional, and no gold colored garbage from Home Depot, Target, Wal-Mart, etc. Splitters should be swapped with known to be good / new ones to test.

Also check the coax cable for any damage such as cuts, nicks, abrasions, kinks, sharp bends, etc.

If there aren't any unneeded splitters that can be eliminated and if your coax wiring setup can't be reconfigured so that there is a single two-way splitter connected directly off of the drop from the street / pole with one port feeding the modem and the other port feeding the rest of the house/equipment with additional splits as needed and you've checked all the wiring and fittings for integrity and tightness and refresh them by taking them apart then check for and clean off any corrosion / oxidation on the center wire and put them back together again, then perhaps it's best to book a tech visit to investigate and correct.

Bear in mind that if the premises facing techs can not find or fix a problem at your home, it is they who are responsible for escalating it up to their line / network / maintenance dept. techs. The problem may lie beyond your home in the local neighborhood infrastructure somewhere but it is their S.O.P. to start at the home. And if the problem is found to be on their side of the demarcation point, there will not be any charge.

Good luck !

Hello @kingknapp. There could be a couple of different issues that make you Internet speeds slow down. Wi-Fi is never guaranteed speeds. Also, old cable or damaged cable could be another issue. We can take a closer look for you and see what is going on. Please send us a direct message with your full name and full service address.

@kingknapp 

Did you get a chance to see if any of those tips apply ? Please update your topic right here on these public help forums.

Since I don't have any splitters, that's luckily not a problem I have to consider.  As for the wires, I checked all of it and didn't see any breaks, sharp turns, or corrosion on the wires/connectors.  Since a couple people stated it could be the wire though, I bought a RG 6 coax cable and I'll just replace the part that goes in the house and see if that fixes it.  The wire's 14+ years old so maybe it's broken down within the wire itself where I can't see it.  I'll post an update in a couple days after it arrives (shipping's been taking longer since holidays) and I've had the chance to do it.  If that doesn't fix it, I'll take William up on the offer and maybe try to get a tech out here if necessary. Thanks for the advice.

Update:

Changing out the cable made little to no difference in respect to the power levels of the channels.  However, when replacing the wire, I noticed that the grounding wire itself within the coax grounding block was severely corroded.  After scraping off corrosion and putting it back in, it seems to have solved one of my issues.  Instead of taking 20-30 minutes to get an initial connection when the modem is restarted, it only takes 2-4 minutes even with the old cord.

I am still having 3 unlocked channels and getting multiple T3 errors every few minutes though, so I'll have to reach out for someone to come by I guess.  For a couple minutes after initially reconnecting the ground I did manage to have the other channels locked and was getting twice the upload speed before it disconnected them again.

@kingknapp 

Tech time ! Good luck ! Please post back with how it goes.