Visitor
•
1 Message
High Power Level in Modem
So I been with xfinity little over year now out no where i been having issue with my modem model was CGM4140COM was about to [Edited: "Language"] I request a new one. So I pick up a cgm4331com for a replacement and nope every thing stay the same until I notice power level was way high.
Upstream 1 2 3 4
| Power Level |
55.8 dBmV
|
55.0 dBmV
|
53.5 dBmV
|
52.5 dBmV
|
|---|
Downstream 25 1 2 3 4
| Power Level |
-20.2 dBmV
|
-11.9 dBmV
|
-12.3 dBmV
|
-12.5 dBmV
|
-12.5 dBmV
|
|---|
now i wondering how would some thing like this happened? am having a tech come out to check the cable to see if need to replace them or we can adjust the power level in the cable what ever i can fix this issue because having restart the modem when get frozen it getting annoying
EG
Expert
•
110K Messages
3 years ago
Yes. The upstream power is too high / out of spec and the downstream power is too low / out of spec. That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.
In an 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 5-1000 MHz, bi-directional, and no gold-colored garbage from Radio Shack, Home Depot, Target, 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, 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.
Good luck with it !
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