Plantronics Vista™
Universal Modular
Amplifier M12
User Guide
TROUBLE SHOOTING GUIDE
PROBLEM: I cannot hear callers/callers cannot hear me
Possible cause
Remedy
Check that the ba eries are correctly
Ba ery problem
installed and that the cover is fi ed
properly.
Incorrect se ng
Refer to the compa bility chart and
of the 6‐posi on
set to the correct posi on.
switch
Adjust to the recommended level as
Check transmit
shown on the compa bility chart and
level
make a test call.
Rotate the volume control on the top
Low receive
of the Vista. To increase the volume,
volume
turn the dial to a higher number.
Cables not
Check the connec ons to your
plugged in
telephone and headset. Refer to the
correctly
user guide for instruc ons.
To use the Vista with your headset,
Headset/handset
make sure that the green indicator is
se ng incorrect
showing on the switch.
Mute func on
Your voice is muted if the green
switched on
indicator is showing on the switch.
PROBLEM: Caller cannot hear you clearly
Possible cause
Remedy
Your voice seems
Only set the transmit level to the level
unclear to your
needed for your voice to be heard
callers
clearly. Do not set this level too high.
KEY
1.
Receiver Volume Control
2.
Headset/Handset Selector Switch
3.
Mute
4.
Headset Port
5.
Transmit Volume Control
6.
Security Cover
7.
Slide Switch
8.
Ba ery Cover
9.
Handset Port
10. Ba ery Installa on
11. Push in and Slide down
12. Ba ery Compartment
13. Screwdriver
14. Telephone Port
15. Install Ba eries
16. Adjust Volume Dial
17. On
18. Off Hook
19. Listen to Dial Tone
20. Set Receive Volume