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Random disconnections with own equipment

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Message 1 of 8
379 Views

Hi,

can someone take a look in the attached image and confirm my signal levels are optimum?

 

I am experiencing time to time some random disconnections..

 

Thanks

1 ACCEPTED SOLUTION

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Message 7 of 8
325 Views
Solution

Hi, just for the record; after getting four times a technician visiting our house, they find out that the node amplifier was fluctuating (apparently due to end of life of the hw). Since the replacement of it, we never got a disconnection nor the level signals raised.

 

Thank you again.

7 REPLIES
Posted by
Connection Expert

Message 2 of 8
351 Views

They are marginal. Especially the upstream. Is that the only channel ? And may be intermittently fluctuating even farther out of spec. 

 

Here's stuff that you can try;

 

The upstream power is borderline / too high That can cause random disconnects, spontaneous re-booting of the modem, and speed and latency problems.

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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Posted by
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Message 3 of 8
332 Views

Thanks a lot for the answer.

 

Do you have any "official" table of the optimum ranges/values for the signal on the different channels?

Posted by
Connection Expert

Message 4 of 8
325 Views
Sorry if you don't believe me but they are here;

http://forums.xfinity.com/t5/Your-Home-Network/Connection-Troubleshooting-Tips/m-p/1253575#M94474

Comcast has never posted anything truly "official" concerning this..



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Posted by
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Message 5 of 8
284 Views

Ey I believe you! don't get my wrong. I was just looking for some table in which I can compare all the values without reposting them here again.

 

Thank you!

Posted by
Connection Expert

Message 6 of 8
260 Views

No worries. As I stated, there is nothing official. The figures posted in that link are the best that you will find.




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Posted by
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Message 7 of 8
326 Views
Solution

Hi, just for the record; after getting four times a technician visiting our house, they find out that the node amplifier was fluctuating (apparently due to end of life of the hw). Since the replacement of it, we never got a disconnection nor the level signals raised.

 

Thank you again.

Posted by
Connection Expert

Message 8 of 8
159 Views

Good to hear ! Closing this topic.




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