Landline phone Jack no longer works

[#1]

A new gateway was recently installed in my home in a different location. The original one had the line connected to the phone jack wired directly to it. Cat5e cable to that Jack. How can I complete the circuit to the gateway to enable use of the jack?

[CCAndrew]

Is there a phone jack in that room where the modem is now located? If not you may need to move your phone to the modem

[#3]

There Is no Jack in that room. The phone works directly plugged into the gateway, but I would like to use the Jack for easier access. Do I need to rewire the house to have the modem connect to the existing jack? It's the only one in the house. The other end is attached to a phone line "biscuit " in the basement.

[CCAndrew]

Yep either move it back to the original location, install a phone line to the new location or just keep your phone plugged into the gateway.