house phones not working after new router and modem

[Jwjeremy]

Hello, I got a new router and modem, and after its all installed, the house phones aren't working. My grandpa also got a new router and modem and his house phones aren't working either.

 

[Alabalcho]

What are the differences in routers? Did you change your ISP, or the service as well?

 

[wtief1]

Just to throw this out there.

I use spectrum(TimeWarner), and even though the modem/router had phone built in I was told I had to keep the old modem for phone. So I have a modem for internet and a modem lol for phone even though I should be able to just have one.

I'm not exactly sure on the why, but they told me when I was activating it that I would have to keep the old modem for phone only. Also They stopped charging me for the modem rental fee what not... which was the whole reason for getting my own modem anyway.