How do I hook up phone line

I would start by calling the ISP and asking, "What do I need to install to use the landline phone number you have assigned to me?"

You need a modem that supports voice and phone line capabilities. Only NG CM series with the (v) in the model number have this ability. 

Or if you can support VOIP devices, then you would need just a external router and a VOIP phone device. 

Again, something to contact your phone/ISP serivces about. They will know how to help you out. 

WoburnDave wrote:

I'd like to know if there is a work-around for this, like a VOIP adapter perhaps? I have cellular only phone service but my ISP has a landline phone number delegated to me. I need to have a landline phone for a Lifeline emergency device and need to do something soon. Any thoughts?

There are two methods to provision a "land line" over internet:

• Most Internet Service Providers (especially cable companies like Comcast, Xfinity, etc.) can provide a modem that also has a telephone jack that can accommodate a regular "telephone".  In my case, I have connected a Panasonic hub that supports wireless handsets.  It is simply an ordinary telephone jack.  Spectrum does not charge a monthly fee for the modem (because I pay a monthly fee to have the telephone service).
• Subscribe to  a Voice over Internet Provider - VOIP -such as one of these: https://learn.g2.com/best-voip-providers
  This requires a VOIP device to be connected to the local network.

Personally, it seems to me that a modem compatible with ISP voice service is the obvious solution.

My ISP, Astound(RCN) said my modem is not compatible with a landlines. They suggested I rent a crappy Arris modem, which they happen to have. I like the Nighthawk modem but not many offer landline connection that's a reasonable price for a home user. It eas only for a Lifeline device. I think they have cellular models now which would have better coverage.