Connecting to a Linux-based server over a modem

Question

I have a black-box device with a modem attached (which I can send commands to), and would like to be able to connect to send data to a server from it. What connectivity options do I have, is PPP the protocol I need to use or is there a better option?

Answer 1

ppp is certainly the most common solution for getting an IP connection over a modem. There are other solutions, but there's no reason not to use PPP if what you need is an IP connection.

If you don't need an IP connection and you're writing both the client and the server, you could also do a straight serial connection from one modem to another, but that's kind of old-school.

Answer 2

PPP is probably your best option, if you also want an IP gateway and routing. If you only need terminal access to the device, and it runs some form of *nix, you probably have getty+serial communication as an option. You can use any number of modem terminal clients on the other side.