I found this works by trial and error (about a week LOL) - thought I'd share
If you need to run your current music on hold to your new Infinity for music on hold, here is an easy way (tested and works)
I cross connected on another port (for the music on hold) which runs to a patch panel (rj11).
I bought a mini recorder control and plugged one end into the rj11, turned it to "record", then tested the 3.5mm end to see if it output music on hold, it worked.
This is what they need to plug into their equipment, it was so much easier than what they were asking me to do.
If you need to run your current music on hold to your new Infinity for music on hold, here is an easy way (tested and works)
I cross connected on another port (for the music on hold) which runs to a patch panel (rj11).
I bought a mini recorder control and plugged one end into the rj11, turned it to "record", then tested the 3.5mm end to see if it output music on hold, it worked.
This is what they need to plug into their equipment, it was so much easier than what they were asking me to do.