c7000v2 resets

I am getting frequent modem resets. The event log states:"Received Response to Broadcast Maintenance Request. But no Unicast Maintenance opportunities received. T4 time out, CM MAC=38.94 ed: dd:f4:c...

plemans
Dec 28, 2020
You're power levels are out of spec. They should be within 3.5dbmv of each other. Yours goes from 4.3dbmv to 10.7dbmv. A 6.5dbmv difference. a little variation is fine but that's quite far.

If they're saying the lines fine, maybe it is indeed a modem issue. You can always try renting a modem from the ISP for a month. If it works fine, it could be the modem. If there's issues, then the ISP can't blame the modem.
It could also be that the ISP gave you a docsis 3.1 device which is a little more tolerant of power fluctuations/levels.

plemans

Guru - Experienced User

Jan 04, 2021

glad to hear it helped!

brm5124

Tutor

Jan 17, 2021

I spoke to soon. After about 3 days the unit started acting up again.

I am currently renting a Modem from Cox. After six days it has not reset once.

I plan to let it run for 2 weeks

If no resets on the rental then I will request a warranty repair, on my Netgear unit.

plemans
Guru - Experienced User
Jan 17, 2021
MIght also be worth comparing what cox gave you. A docsis 3.1 modem is going to be more tolerant of line issues than a docsis 3.0 device (like the c7000 is)
brm5124
Tutor
Jan 17, 2021
The Modem is an ARRIS tg1682g which I show as a docsis 3.0 unit.
Either way a modem should not be resetting multiple times a week.

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c7000v2 resets