Plantronics Vista Universal Modular Amplifier M12 Users Guide

43346-01 (9•98)
345 Encinal Street
Santa Cruz
CA 95060
Tel 1.800.544.4660
www.plantronics.com
Printed in USA
© 1998 Plantronics, Inc.
Vista™
Universal Modular Amplifier
M12
Users Guide1
VISTA cov.eng.mech  9/16/02  5:18 PM  Page 30  

1Telephone Jack
2Screwdriver
3Handset Jack
4AC Power Supply Jack
5AC Power Supply
6Amplifier to QD Coil Cable
7Amplifier to Telephone 
Coil Cable
Install in 4 easy Steps
Step 1:Install batteries.
Step 2:Attach to phone and headset.
Step 3:Set default settings.
Step 4:Set telephone/amplifier 
compatibility switch.
Make a test call.
Learn the basics.
welcome
to the Vista™ Universal
Modular Amplifier
from Plantronics
®.
PA R T  I
PA R T  II
PA R T  III
The Vista Universal Modular Amplifier adapts your...

install
in 4 easy steps
INSTALL BATTERIES
ATTACH TO PHONE AND
HEADSET
SET DEFAULT SETTINGS
SET TELEPHONE/AMPLIFIER
COMPATIBILITY SWITCH
I
PA R T
english iv
connections& features
Connect the Vista amplifier to your telephone as shown.
Follow the four easy steps on the following pages for
complete installation details.
Amplifier Features
•SoundGuard®Plus™Sound Compression protects you
•from harsh noises, such as fax tones
•Call Clarity
™System improves incoming and outgoing sound
•Switch easily between...

english 3 english 2
INSTALLATION STEPS 
1. Unplug your telephone’s handset cord
from the telephone base.
2. Plug your telephone’s handset cord into
the Vista amplifier handset jack (    ).
3. Connect your telephone base to the
Vista amplifier telephone jack (    ) using
the short curly cord. On your telephone
base, plug the short curly cord into the
outlet normally used for your handset.
4. Plug the headset cord into the Quick
Disconnect™(QD) module on the long curly
cord coming from the front of the...

english 5 english 4
INSTALLATION STEPS 
1. Put on headset.
2. Lift the phone’s handset off the cradle
and place it on your desk.
3. If you don’t hear a dial tone, adjust the
Telephone / Amplifier Compatibility
Switch as indicated below:
1. Remove the Telephone Compatibility
Switch Access Door by placing two fin-
gers or thumbs on the raised bumps and
pushing down.
2. Remove the flat, plastic screwdriver
from the bottom of the amplifier by slid-
ing it through the braces holding it in
place.
3. Make sure...

MAKE A TEST CALL.
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make 
a test call
II
PA R T
1. Put on headset. Refer to your headset’s User Guide to
adjust the microphone position for best performance.
2. Lift the phone’s handset off the cradle and place it on your desk.
3. Make sure your Vista amplifier settings are in default. See
page 4 for details.
4. Call a friend or colleague.
5. Adjust the Incoming Volume using the Incoming Volume
Thumbwheel. Refer to page 10 for more details.
6. Adjust the Outgoing Volume Control until the person...

LEARN THE BASICS.
Default settings
These are the default settings for 
headset use:
1. Headset / Handset Selector is depressed
(colored indicator showing).
2. Mute Switch is released (no colored
indicator showing).
3. Incoming Volume Thumbwheel is set to 4.
Making and Receiving Calls with aHeadset
1. Put on headset.
2. Make sure the amplifier settings are in
default.
3. Lift the phone handset  off the cradle
and  place on your desk.
4. Make or receive your call. You will use
the dial pad and/or other...

LEARN THE BASICS
Muting a Call
1. Activate the Mute function by depressing the
Mute switch (colored indicator showing).
2. Deactivate the Mute function by releas-
ing the Mute switch (no colored
indicator showing).
Making and Receiving Calls with aHandset
1. Release the Headset / Handset switch
(no colored indicator showing).
2.  Use the phone handset as you normally
would.
11
LEARN THE BASICS
Adjusting Headset Incoming Volume
1. Adjust the volume by turning the
Thumbwheel on the top panel. 
2. Try...

maintenance 
and troubleshooting
A
SECTION
12english
MAINTENANCE AND
TROUBLESHOOTING
PROBLEMITEMS TO CHECK
I DO NOT HEAR A
DIAL TONE WHEN  I
TRY TO MAKE OR
RECEIVE A  PHONE
CALL.
If you are using batteries, confirm that they
are good and placed in the battery compart-
ment correctly.
If you are using an AC Power Supply, confirm
that it is plugged in and the power outlet is
turned on.
Confirm that the Headset / Handset Selector
switch is depressed (colored indicator showing).
Confirm that you have lifted...

15
MAINTENANCE AND
TROUBLESHOOTING
english 14
I GET A LOW PITCHED
HUM IN MY HEADSET
SPEAKER AND/OR  MY
CALLERS COMPLAIN
THEY CAN HEAR HUM.
I HEAR THREE ‘BEEPS’
IN THE  HEADSET.
PROBLEMITEMS TO CHECK
MY CALLERS SAY
THAT THEY  CAN’T
HEAR  ME AT ALL  OR
THEY CAN’T HEAR
ME VERY WELL.
Make sure the microphone of your headset is
positioned in front or near your mouth. If you
are using a “noise-cancelling” headset, the
position of the microphone is very important.
You may need to adjust the “Outgoing
Volume”....