Originally Posted by firefighterjh
HI I have a headset installed off the 25 pin connector on the back of the control head
The control head (if it's remoted) will have a 12 pin molex connector. The DB-25 connector is on the back of the radio chassis.
Hooking audio accessories to the control head is straight forward and should just work. If you use the DB-25 connector, a jumper needs to be moved inside the radio to enable the mic line.
You'll also need a headset that has a mic that is compatible. Do you know what type of mic you have?