I have a C7100V firmware V2.01.42 cable modem router with phone connected to comcast. Every couple days or so the Wi Fi slows way down and the phone starts chopping/cutting in and out the incoming voice it does not appear to affect the out going voice. To correct this I have to login to modem goto home advanced select Internet Port-Connection Status and then in that window renew conection. After that everything is ok for a day or two. Any help would be appreciated thanks.

Its worth a shot. It shouldn't necessarily cause the issue your having but having the network setup right is only going to be beneficial for troubleshooting.

c7100v firmware v 2.01.42 internet and phone issue .

13 Replies

plemans
Guru - Experienced User
Apr 15, 2020
if you log into the C7100v and click on its modem connections page, take as screen snip of that page. also get your logs page. this helps check the connection back to the isp.
also if you have any splitters, attenuators, amplifiers in the coax line, remove them.
arniem
Guide
Apr 15, 2020
tried to post snips but cant figure out how to post them.
- plemans
  Guru - Experienced User
  Apr 15, 2020
  when you click on reply, its the "choose file" option at the bottom of the text box.
  - arniem
    Guide
    Apr 15, 2020
    Yes do have channels set to manual thanks. Will try to load pics.
FURRYe38
Guru - Experienced User
Apr 15, 2020
What channels are you using? Auto? Try setting manual channel 1, 6 or 11 on 2.4Ghz and any unused channel on 5Ghz.
Any Wifi Neighbors near by? If so, how many?

Have the ISP check the signal and line quality UP to the modem.
Be sure there are not coax cable line splitters in the between the modem and ISP service box.
Be sure your using good quality RG6 coax cable up to the modem.

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c7100v firmware v 2.01.42 internet and phone issue .