Rephrasing Analog Modem Question

Here's a new direction for that analog modem question... it's sort of getting creative in some interesting directions, but not quite what I have a system with 5 internal modems - I can't go with serial ports/external modems for this system, they must stay internal. So, I need to find a way so people can telnet to them. Essentially, I have a lan connection and a bank of analog modems - Can anyone think of a solution, no matter how crazy it is, to get me to be able to telnet from the internet and connect to these 5 systems? If I get 5 phone lines, that's not doing me any good, as I want to make it accessible over the net. So, somehow I have to get a connection to go from the net to trigger an analog modem source, which calls one of the 5 internal modems, then feeds the data back over the line and to the telnet connection. I've been researching some of the solutions people have proposed, but I'm not real familiar with some of the capabilities of these systems. With the reverse telnet concept, that would work if I could change my computer's modem pool to external serial devices (get rid of the analog). I can't do that yet.. Perhaps is there a device that acts as a remote access server, that once connected, it dials out through another port to make a connection? Or, was there a LAN device that would allow you to telnet to the device and initiate a call over an analog phone line? Pete