Motorola 4550 - Manual (Page 68)

Advanced Features
English
58
NOTE: Turning this feature on or off is limited to radios with
this function enabled. Check with your dealer or system
administrator for more information.
Procedure:
Press the programmed VOX button to toggle the feature on or
off.
OR
Follow the procedure below.
1 S to access the menu.
2 P or Q to Utilities and press N to select.
3 P or Q to Radio Settings and press N to select.
4 P or Q to VOX and press N to select.
5 The display shows VOX On. Press N to disable VOX. A
tone sounds and the display shows VOX Off.
OR
The display shows VOX Off. Press
N to enable VOX. A
tone sounds and the display shows VOX On.
If the Talk Permit Tone feature is enabled (see Turning the Talk
Permit Tone On or Off on page 61), use a trigger word to
initiate the call. Wait for the Talk Permit Tone to finish before
speaking clearly into the microphone.
Turning the Public Address System On or Off
You can enable and disable the radio’s internal public address
(PA) system.
Procedure:
Press the programmed PA On/Off button to toggle the feature
on or off.
Turning the External Public Address System On
or Off
You can enable or disable the audio routing between the
connected public address (PA) loudspeaker amplifier and the
radio’s internal public address (PA) system.
Procedure:
Press the programmed Ext PA On/Off button to toggle the
feature on or off.
Controlling the Display Backlight
You can set the radio’s display backlight intensity to either Low,
Medium, High, or Off, to light up the display and the Menu
Navigation Buttons backlighting accordingly. The setting also
affects the keypad backlighting on a keypad microphone.



NAG_6880309T15.book Page 58 Tuesday, March 9, 2010 11:47 AM