I'm looking for a phone patch unit that I can send to my friend in a
distant location where I used to live, so that he can patch me into
local 2 meter repeaters.

I've never seen a phone patch unit, so I don't know how they work. He
has a Yaesu 736 (2m/440Mhz) rig.

I would appreciate some help on what kind of unit I need to look for
to fit his rig, and how it operates!

Thanks and 73,

George, N9EJS