Both options listed here will work. You can use telser.device modem emulation with your preferred terminal software. After much twiddling around, I have settled on TERM as many others have. I keep NComm and JRComm handy as close runner-ups.
You could also just go with DCTelnet which is a pure telnet program that will work over your TCP/IP connection. I use Roadshow myself since it is so fast and lightweight.