connecting vt100 terminal emulator to modem via voip?

[insideseam]

i'm trying to figure out how to access a control panel (on pstn) from my computer (on internet), and then 'converse' w/ the panel via some vt100 terminal emulator (like hyperterminal or telnet).

 

if i had a land line to my computer i could use hyperterminal or some such, but i'd like to avoid getting a line installed. would this software be able to support this type of call? if not, do you know of other software that would?

 

thanks for any help/direction.

 

(i know next to nothing about this stuff, so i apologize if this is the wrong place to ask or if the whole idea is dumb)