Building a mobile PBX

Hello folks,

I’ve done some searching on this site, but have been unable to come up with what I’m looking for. You folks seem to be the experts, so let me throw this out there.

I work for a local emergency medical services agency, and am researching how to build a field-deployable PBX to use for command and control during disasters, as well as to use in the event our communications center needed to be evacuated.

I envision a system using cellular to connect an Asterisk-based system to the rest of the world. I’m familiar with conventional PBX systems, but could use some advice on how to have multiple incoming cellular lines on the same number, connected to the Asterisk system. Is this even possible?