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Intermittent T-3, T-4, and MDD Timeouts. Please fix our connection issues.

asmith2017
New Poster

Intermittent T-3, T-4, and MDD Timeouts. Please fix our connection issues.

Hi, this problem started occuring in mid-May, and Xfinity support has not done anything about it. Maybe someone here has an idea? I see MANY posts about this same issue, but maybe my data can help, too.

We receive intermittent timeouts in our connection, as described in the title. They only last for 5 - 10 minutes, but occur at least 6 or more times per day. Our setup is as follows:

Air drop from power pole -> new barrel connector, provided by Xfinity, -> 50 ft. RG6 75 Ohm co-ax -> Modem-router (Netgear C7000v2; firmware is up-to-date) (- > short ethernet cable -> my desktop, if that matters).

I have troubleshooted each of the components on my side of the drop, but they are fine on a normal basis.

 

Screen shots of downstream, upstream, and SNR, directly after a disconnection occured:

https://imgur.com/a/ofP1TGA

 

Any thoughts? I've been following this saga (https://forums.xfinity.com/t5/Your-Home-Network/How-to-get-Comcast-to-help-me-with-quot-No-Ranging-R...), and the problem seems very similar. Is this and all the other posts from the past few days about timeouts and connections related?

EG
Expert

Re: Intermittent T-3, T-4, and MDD Timeouts. Please fix our connection issues.

The upstream power is borderline / high and it may be intermittently fluctuating even higher to out of spec levels. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

 

See if anything below applies. If not, you'll need a tech out to investigate / correct the problem.

In a self troubleshooting effort to try to obtain better connectivity / more wiggle room, check to see if there are there 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 types like GE, RadioShack, RCA, Philips, Leviton, Magnavox, and Rocketfish from big box stores like Home Depot, Lowes, Target, Wal-Mart etc. Splitters should be swapped with known to be good / new ones to test

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.



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asmith2017
New Poster

Re: Intermittent T-3, T-4, and MDD Timeouts. Please fix our connection issues.

Thanks for your response. Those were my first steps; we have no splitters (we only need one connection in our house), and I've tried replacing the other equipment with quality stuff. Nothing has worked. so far.

EG
Expert

Re: Intermittent T-3, T-4, and MDD Timeouts. Please fix our connection issues.

Well then it's tech visit time although that may be difficult to get at this time. Good luck !!

 

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 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.




I am not a Comcast Employee.
I am a Customer Expert volunteering my time to help other customers here in the Forums.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark the post as Best Answer!