Batboard

I have a Maxtac connected to several DataRadio MRMs and a base unit with Maxtrac and I can't find a shred of info online to know how to configure and communicate with these things. The units power up and attempt to communitcate, but I was wondering if anyone has or knows where I can get manuals or information for the DataRadio 48G4 series MRM and/or base unit??

I would appreciate any info you might have.

Thanks,
Eric Willman
WD8LEI