Transmitting Audio With Wired Accessory; Using Keypad Or Channel Selector Knob Lock; Chapter 7: Advanced Operations; Triggering Emergency Alarm - Vertex Standard VX-556 User Manual

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• You can customize the VX-556 button functions through
the Customer Programming Software (CPS).

Transmitting Audio with Wired Accessory

1. If a microphone/speaker (Mic/SP) is available, remove the Mic/SP
cover and the mounting screw from the right side of the radio.
2. Align the connector of the Mic/SP on the radio body.
3. Hold the speaker grille up next to your ear while receiving.
4. Press the PTT button on the Mic/SP and speak into the microphone at
a normal voice level.
Note:
• Save the original microphone/speaker cover and the
mounting screw. You can reinstall the microphone/speaker
cover and the mounting screw when you are not using the
microphone/speaker.
• When you press the PTT button on the microphone/
speaker, it disables the internal microphone, and vice
versa.

Using Keypad or Channel Selector Knob Lock

1. To lock the Channel Selector knob, press and hold the Side-1
button.
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In Lock mode, the display shows Lock when you rotate the Channel
Selector knob or press the programmable keys.
2. To disable Lock mode, press and hold the Side-1 button.
Advanced Operations

Triggering Emergency Alarm

To trigger the alarm function, press and hold the Emergency Alarm
button.

Scanning Radio Channels

The scanning feature is used to monitor multiple channels programmed
into the transceiver.
1. To activate scanning, press and hold the Side-2 button.
Scanner searches for an active channel and pauses at a channel with
an available signal.
2. To deactivate scanning, press and hold the Side-2 button.
Operation reverts to the channel displayed on the Channel Selector
knob.

Monitoring Channels

1. Press and hold the Side-3 button.
You can now hear "white noise."
2. Set the Volume/Power button for the desired audio level.
3. To stop monitoring the channel, release Side-3.