GAI-Tronics XAAB002A Audio Accessory Box - Manual (Page 16)

Operation Model XAAB002A Audio Accessory Box
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Off-Hook Output (J1 – pin 2)
The off-hook output located on J1 (8-pin output connector) is asserted when either the handset connected to
the J4 (GAI-Tronics handset connector) is taken off-hook, or when a headset is connected to J6A and J6B
(headset dual ¼-inch telephone plug). This signal is used by the audio accessory box to select the correct
microphone and may be used to route audio appropriately in the connected unit. When a GAI-Tronics
handset is not connected to J4 or is not able to be placed on-hook, it appears that the handset is off-hook to
the audio accessory box. Therefore, when not using a GAI-Tronics handset, the internal jumper, JU1, must
be in.
Always allow a short delay before speaking to allow time for the radio channel to be established. The
TRANSMIT button or handset PTT bar must be held down while talking to the radio user and released to
listen. When the transmission is completed, the TRANSMIT LED extinguishes and the desk set returns to
the receive mode.
Telephone Interface
This feature allows the operator to use a common headset/microphone for both radio and telephone
operation. No telephone-to-radio patching will occur. The radio communication can be muted during a
telephone communication by pressing the
MUTE RADIO push button on the unit’s front panel.
N OTE : The telephone must be in off-hook mode for the headset to be active.