Dumn question time ... here goes.

I have 2 DTC16s...on the back, each DTC has 16 RJ-45 ports.  Our set up here
is Cro-Magnon...everything is serially connected and uses 4-wire phone cord
with modular to 25-pin or 9-pin converters for terminals or printers or
PC's.  Then we have a short 4-wire cords coming from the back of the
computer with a RJ-45 plug on the DTC side and RJ-12 on the other end.

So here is the dumn question, finally:

On the one hand, I am successfully using a Multitech Mux to connect three
DTC ports with a remote location to drive a terminal and two printers, but I
don't seem to be able to connect a modem to the DTC with the current set up.
4 wires is not enough, it seems.  I hear of DTC's having 25-pin connection
capability, but mine do not.  I am, like, completely ignorant in this area.
Do I need a different DTC?  Do I need different options on my existing DTCs?
In any case, all 32 of my available ports are currently tied up.  So can I
just buy a new DTC optioned differently?  Your experience and wisdom would
be appreciated.
                                Tom Hula
                                Victor S. Barnes Company