I'm currently running a Redhat 9 firewall server at home. I want to be able to dial-in to my box
just in case there are some ISP issues and I can't SSH into the system.

Is there a way how I can use my home phone line to connect to my linux box and use special software or modem that will allow me to connect without my answering service grabbing the call first.

Or better yet is there way set a modem in linux to be smart enough to know the difference between a phone call signal and modem call signal so they don't conflict?

I don't the modem to answer if it's voice call .

I hope this make sense.

Tim