Partyline: How do I place an AB-120 into announcer mode?
ANNOUNCER MODEL LATCHING MICROPHONE
Place a jump jack on pins 2 and 3 of JP11. In this mode, the microphone on/off button is latching in action and talk-back is momentary in action.
The red LED next to the on/off button is lit whenever the microphone output is active.Pressing the on/off button toggles the state of the mic from on to off, or vice versa, each time the button is pressed.