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Modem signal strength - One-way voice calls

dennisquick
Regular Visitor

Modem signal strength - One-way voice calls

Using Netgear CM500V (voice) and would like to know the minimum and expected signal strength/power in dBmV to insure error free connection.  Now -8.6 to -9.7 dBmV on 16 channels and experiencing many incorrectable errors and one-way voice call reception issues .

EG
Expert

Re: Modem signal strength - One-way voice calls

That's low / weak. Please also post the upstream stats.



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dennisquick
Regular Visitor

Re: Modem signal strength - One-way voice calls

Netgear CM500V upstream signal strength is 50-51 dBmV on 4 channels.  Also weak?

EG
Expert

Re: Modem signal strength - One-way voice calls

It's too high ! That can cause random disconnects, spontaneous re-booting of the modem, speed, packet loss, latency problems, and the un-bonding of channels.

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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dennisquick
Regular Visitor

Re: Modem signal strength - One-way voice calls

Thank you for the recommendation.  Since we are no longer using Xfinity Cable TV, will check in attic and remove any splitter and connect only to cable that goes solely to the modem.

dennisquick
Regular Visitor

Re: Modem signal strength - One-way voice calls

As U suggested found unneeded , cruddy old splitter, removed, cleaned and inserted strait-through coupler.  Netgear CM500V signals now  -1.5 to -0.9dBmV downstream and 41-42dBmV upstream.  Good?

EG
Expert

Re: Modem signal strength - One-way voice calls

Yep ! Glad you got it sorted out ! Live with it a while and see. You should be golden !



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