User's Manual Part 1

Equipment and accessories
24
When external equipment is connected
to the radio, the right side of the display
will show a headset.
Impact on radio operation
The external equipment can have a built-in PTT, speaker and
microphone. Thus connecting it to the radio will have the following
impact on the radio operation:
• If a microphone is built into the detected external equipment, the
external equipment microphone is used, and the internal radio
microphone is disabled.
• If a speaker or earpiece is built into the detected external equipment,
the external equipment sound device is used, and the internal radio
speaker is disabled.
• If a PTT or VOX is built into the detected external equipment, the
external equipment PTT control is used, and the radio PTT button is
disabled.
Accessorie connector
Pin 1. Loudspeaker,
minimum 8 ohm impedance.
Pin 2. Accessory power,
5V maximum 0.03A.
Pin 3. Microphone input,
Ri = 2.2kohm, 3V phantom power.
Pin 4. GND.
0740