what is the best way to have 48 units talking to base station

Using an XTend OEM module.
Hi, I want to have 48 rovers talking back to a single base station. They may be operating beyond normal ranges so I need the base station to just listen with no handshaking. I was wondering if I could program each rover to talk only on a single channel? And if so, what would be the best way to receive all of the data from the rovers?

A single channel no but to a single address sure. Just set your radios with a classic Point to multi point addressing scheme similar to:

Base Remote 1 Remote 2 etc
MY1 MY2 MY3 etc

What this does is allows the base to talk to all remotes in range and any remote that is in range will only talk to the Base.

Looks great. Thanks, I will give it a try.