A couple of old MC3810 with 4w e/m signaling, in a point to point aplication.
Use the e/m wires to key up the radio.
That will requiere two voip terminals, one at the consle location, and the other at the transmitter location.
Never done it, but it is a project that I always thought about ,since I use to play with radios long ago.
Imagine the posibilities: You move to another country, but still talk with your handheld radio to your buddies clean across the globe.
I bet you money some old radio folks will faint when they see you talking with 1 watt from the USA to South Africa.