🚀 go-pugleaf

This is a first-time post so please bear with any mistakes I make. 
I am taking an introductory robotics class here at NCSU, and for a 
group project we have three tasks. Our robot is designed around a
VME bus interface system, and the first two tasks are to implement
a rudimentary voice sythesis and recognition system. The third task 
involves designing a 2400-Baud cordless(Radio) modem so that the
operator does not have to follow the robot around to enter commands.
Presently, there are null modem lines connecting the command terminals
to the bus, and we are simply replacing these with a cordless line.
We have found several chipsets to do all of these tasks, so I am
really just asking if anyone has had excellent succes with any
particular company or configuration. Also, I am a little confused as to
whether we need a modem(acoustic) signal to modulate using a transmitter
or whether we can just modulate the serial signal.

Any help would be greatly appreciated. Please reply with e-mail if
possible.       
                     Thanks,
                      Bill Kiether

William J Kiether
North Carolina State University
e-mail: wjk@ecesting.ncsu.edu