Build a custom modem (analog,cellular,satellite and landline)all in one(no internet)

I want a custom modem system built to communicate between field machinery and my home office(computer). I also want to be able to
communicate vie smartphone to my base station(office computer).
I want 3 analog embedded modems,3 analog/digital embedded modems,
3 digital embedded modems,3 digital/satellite modems, 3 satellite modems,and 1 landline (phone jack) modem. All connected to a
embedded router, router connected by serial port. Each back of modems connected to a signal strength meter, and the meter to
antenna or transponder.
System must have 24/7 operation and be able to transmit in real time for interactive operation.

Thanks for your response. I've received several responses, am reading them all before I make a selection.

The unit I need developed is a all in one meaning 3 analog embedded cellular,3 analog/digital embedded cellular,3 digital embedded cellular,3 digital/satellite embedded cellular,3 satellite embedded cellular, and 1 land line modem all in 1 housing, each connected to a built in router. Then a external 238 serial port connection from the unit. The unit then can be connected to my computer vie cord.

Also I need signal booster built into the unit (sense all are linked by cellular or satellite). "NO INTERNET"! The unit must also have built in signal meters for each modem and cellular antennas and transponders (low profile), one of each should work for all modems.

Then sense each modem will have it's own number, software that selects the modem with the strongest signal strength and lowest cost to transmit.

I well need 5 units in total and a smartphone link (software) I can use to communicate with my base-station (office computer)

I hope the more detailed description brings my request more in focus.

If you have any questions fill free to contact me. I need some type of idea on your concept (description and technical layout)
before I commit to beginning a job.

I hope I've explained the complexity of the system more clearly.