PLANTRONICS M12 Universal Headset Amplifier User Guide
- October 26, 2023
- Plantronics
Table of Contents
M12 Universal Headset Amplifier
User Guide
M12 Universal Headset Amplifier
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WELCOME
to the M12 Universal Headset Amplifier from Plantronics ®
The M12 Universal Headset Amplifier connects your single or multi-line
telephone to a Plantronics headset. The M12 Amplifier provides precise levels
of listening and talking comfort, superior protection, and excellent audio
performance.
Note: The M12 Amplifier is not designed to work on telephones that have the
dial pad in the handset or on cordless telephones.
This side of the user guide provides the following steps to quickly set up and
use your amplifier:
- Identify the components
- Install the batteries
- Attach to telephone and headset
- Check the default settings
- Set telephone/amplifier compatibility slide switch
- Make a test call
The other side has more details:
- Examine other features
- Troubleshooting
- Technical Support Center Information
- FCC Information
- Parts and Accessories
- Warranty and Service
IMPORTANT SAFETY INSTRUCTIONS
When using your telephone equipment, basic safety precautions should always be followed to reduce the risk of fire, electric shock, and injuries to persons.
- This product can get its power from the telephone line. Please note that a spark can occur if the cord is damaged.
- Do not allow anything to rest on the telephone cord. Do not locate this product where persons walking on it could damage the cord.
- Unplug this product before cleaning. Do not use aerosol or liquid cleaners. Use a damp cloth for cleaning.
- Do not locate or use this product in wet environments.
- Do not install this product during a lightning storm. Do not damage or take apart this product.
- Use all normal precautions that would apply to telephones or other electrical appliances.
SAVE THESE INSTRUCTIONS
M12 QUICK START GUIDE
Install the Batteries
The M12 Amplifier requires power to work with most phones.
2.1 Slide both batteries into the side of the M12 Amplifier as shown in the
illustration.
An outline of the battery ‘+’ and orientation is also shown on the panel that
separates the two batteries (top positive, and bottom negative).
2.2 Use the battery door iii to push down on both batteries. 2.3 Then slide
the door into a locked position. (The door does not snap in.)
2.4 When the batteries are low, you will hear three ” beeps” through the
headset or you will notice that the sound quality is not good.
2.5 An optional AC power supply can be purchased and plugged into the AC power
supply jack. (See Parts and Accessories.)
Attach Telephone Headset
3.1 Unplug your telephone’s handset cord from the telephone base.3.2 Plug your
telephone’s handset cord into the M12 Amplifier handset jack,3.3 Plug one end
of the short cord 15 into the telephone jack 10′ and the other end into the
telephone handset jack on the telephone base.3.4 Connect the telephone plug
end of the long cord114 1 into the front of the M12 Amplifier and attach the
Quick Disconnect (QD) module end to any Plantronics H-Series professional
headset.
The QD allows you to disconnect the headset from the amplifier when you are
not using the telephone, or need to move away from your telephone without
removing your headset.
Make a Test Call
6.1 Ensure you have a dial tone by having the telephone handset set off-hook
and resting on the desk.
6.2 Use your telephone keypad to call a friend or colleague.6.3 Adjust the
listen-to volume using the listen-to volume control. (1 is the quietest and 9
is the loudest)
6.4 If your friend cannot hear you, or you hear a buzz or hum, try changing
the compatibility slide switch (Step 5.4).
6.5 If necessary, adjust the speak volume control by using the plastic
screwdriver to turn the speak volume control until the person on the other end
can hear your voice at an appropriate level.
6.6 Snap in the compatibility slide switch cover by positioning the two
alignment guides into their slots and then pushing in and down until it snaps
shut.
The raised bumps on the access door will allow you to push in and slide it
open at another time.6.7 After completing the call, return the handset to its
cradle.
6.8 To receive a call, remove the handset from its cradle, depress the headset
button, and begin talking through your headset.
Set Telephone/ Amplifier Compatibility Slide Switch
5.1 Put on a headset and have an amplifier in the default settings (Step 4).
5.2 Lift the telephone’s handset off the cradle and place it on your desk.5.3
If you hear a clear dial tone, you can proceed to Step 6.
5.4 If you don’t hear a dial tone, adjust the compatibility slide switch 2
following this process:
- Slide out the flat, plastic screwdriver 10 from the bottom of the amplifier.
- Use the screwdriver to slide the compatibility slide switch 2 until you hear a clear dial tone. Experimenting with various switch settings will not harm the amplifier or your telephone.
Check the Default Settings
Always start with these settings to use your headset.
4.1 Headset /handset selector button 6 is depressed (colored indicator
showing).
4.2 Mute button is 7 released (colored indicator not showing).4.3 Listen
volume control is5 set to 4.
4.4 The speak volume control has 5 been pre-set. You can adjust it in Step
6.5.
4.5 Compatibility slide switch 2 in position 5.
EXAMINE OTHER FEATURES
-
To receive calls with your headset
1.1 Put on your headset.
1.2 When your telephone rings, push the headset/handset button 6 (colored indicator is showing). 1.3 Remove the handset from the cradle and place it on your desk.
1.4 Begin talking to your calling party.
1.5 To end a call, hang up the handset. -
To make and receive calls with your telephone handset
2.1 Release the headset/handset button (colored indicator not showing).
2.2 Use the telephone handset as normal. -
To test the necessity of batteries
If your compatibility slide switch 2 was set to 1 or 2, batteries may not be required.
3.1 Remove the batteries. 3.2 Follow the instructions to make a call, Steps 6.1 to 6.3.
3.3 If you do not get a dial tone, your telephone model requires batteries or may be installed incorrectly (check set up steps). -
To switch from your telephone handset to your headset
4.1 Alert your caller that there will be a short delay, and mount and adjust your headset.
4.2 Push the headset/handset button (colored indicator showing).
4.3 Resume talking through your headset. -
To switch from your headset to your telephone handset
5.1 Alert your caller that there will be a short delay in releasing the headset/handset button (colored indicator not showing).
5.2 Remove your headset and pick up your handset.
5.3 Resume talking through your telephone handset. -
To use the mute function.
6.1 Depress the Mute Button 7 (colored indicator showing). You will be able to hear them but they can’t hear you.
6.2 Release the mute button (colored indicator not showing) to deactivate the mute function.
Your working system should look like this:
It provides the following benefits:
Amplifier Features
- SoundGuard ® Plus ™ technology quickly reduces the level of harsh noises, such as fax tones
- Call Clarity ™ improves incoming and outgoing sound
- Switch easily with one button selection between headset and handset
- Incoming and outgoing volume control
- Mute control
TROUBLESHOOTING
I do not hear a dial tone when I try to make or receive a telephone call.
- If you are using batteries, confirm that they are good and placed in the battery compartment 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 button is depressed (colored indicator showing).
- Confirm that you have lifted the telephone handset out of the cradle.
- Confirm that the telephone handset cable and the short cord to the telephone are connected to the correct jacks (see Step 3).
- Confirm that the compatibility slider switch is in the correct setting for your telephone (see Step 5). You may want to try moving the switch through all of the positions until you hear a clear dial tone.
My callers say that they can’t hear me at all or they can’t hear me very well.
-
Make sure the headset microphone is positioned in front of or near your mouth. If you are using a noise-canceling headset, the position of the microphone is very important.
-
You may need to adjust the outgoing volume. See Adjusting Headset Speak Volume Step 6.5.
-
If you have a voice tube, it may be clogged.
Try rinsing it with lukewarm water only.
Shake it and wait until it is completely dry.
Then put it back on the silver stem of your headset. -
Confirm that the compatibility slider switch is correct for your telephone (see Set the Telephone/Amplifier Compatibility Slider Switch Step 5).
You may want to try moving the switch through all of the positions until your caller hears you clearly.
I do not hear the caller clearly.
- If you are using batteries, confirm that they are good.
- If your telephone has an adjustable volume, set the volume on your phone to mid or below mid-range. Use listen to the volume control on your amplifier to adjust the headset volume to a comfortable level.
- Confirm that the compatibility slider switch is in the correct setting for your telephone (see Step 5). You may want to try moving the switch through all of the positions until you hear a clear dial tone.
I get a low-pitched hum in my headset speaker and/or my callers complain they can hear the hum.
- Try moving the telephone/amplifier compatibility slider switch through all of the positions until the hum disappears.
I hear three ‘beeps’ in the headset.
- If you are using batteries to power the M12 Amplifier, three ‘beeps’ tell you that the batteries are low and need to be replaced. See “Install Batteries” Step 2.
Plantronics Technical Assistance Center
The Plantronics Technical Assistance Center (TAC) is ready to assist you!
Dial (800) 544-4660 x5538 Sunday 5 p.m. through Friday, 5 p.m.
Pacific Standard Time or visit the Support section of our website at
www.plantronics.com.
For accessibility information also call the Technical Assistance Center (TAC).
FCC REGISTRATION AND INFORMATION
FCC Requirements–Part 68
This equipment complies with Part 68 of the FCC rules.
On the baseline underside is a label that contains, among other information,
the FCC registration number and ringer equivalence number (REN) for this
equipment. If requested, this information must be provided to the telephone
company.
The telephone company may make changes in its facilities, equipment,
operation, or procedures that could affect the operation of the equipment. If
this happens, the telephone
the company should provide you advance notice in order for you to make the
necessary modifications to maintain uninterrupted services.
If you experience problems with your headset, please refer to the warranty
section for information on warranty and repair services.
If the problem is causing harm to the telephone network, the telephone company
may request that you remove the equipment until the problem is resolved. In
extreme cases, the telephone company may be forced to disconnect your service
before notifying you of the problem.
PARTS AND ACCESSORIES
AC Power Supply 26503-01
Telephone/Amplifier
Compatibility Slide Switch Door 26609-02
Battery Door 26609-02
Amplifier to Telephone Coil Cable 40974-01
Male-to-male modular plugs
Amplifier to QD Coil Cable 26716-01
QD to male modular plug
Velcro ® Amplifier Attachment Kit
17521-01
Amplifier Security Device
40696-01
Attaches amplifier to the desk
Plantronics Custom Cradle Mate
40715-01
Holds handset “off-hook” and a flashing “BUSY” light indicates when the
headset is in use
Cradle Mate only
40714-01
An easy-to-use device that mechanically lifts the handset “off-hook”
For information on accessories and spare parts, call Plantronics at (800) 544-4660 x5538, or visit the Plantronics website at www.plantronics.com
LIMITED WARRANTY
What does this warranty cover?****
– This warranty covers any defects in workmanship or materials in this product purchased in the U.S. or Canada. For warranty information in other countries, contact your local distributor.
How long does the coverage last?****
– This warranty runs for two years from the date of purchase.
What will Plantronics do?****
– If the product is found defective, we will exchange it at no charge.
What does this warranty not cover?****
– Damage caused by, OR PERFORMANCE PROBLEMS RESULTING FROM, USING THIS PRODUCT
WITH AN UNAPPROVED NONPLANTRONICS headset AND/OR CONNECTOR CABLE, accident,
abuse, misuse, or an act of God (such as a flood) are not covered. IMPLIED
WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
PURPOSE, AND NON-INFRINGEMENT SHALL (A) HAVE NO DURATION GREATER THAN 2 YRS
FROM THE DATE OF PURCHASE, (B) TERMINATE AUTOMATICALLY AT THE END OF THAT
PERIOD, AND (C) TO THE EXTENT PERMITTED BY
– LAW, BE EXCLUDED.
– Consequential and incidental damages, INCLUDING WITHOUT LIMITATION, LOSS OF
PROPERTY AND THOSE ARISING FROM BREACH OF ANY EXPRESS OR IMPLIED WARRANTY, ARE
NOT THE RESPONSIBILITY OF PLANTRONICS, AND TO THE EXTENT PERMITTED BY LAW, are
excluded. Some states do not allow the exclusion or limitation of incidental
or consequential damages, so the above exclusion may not apply to you.
How do you get service?****
– To obtain service in the U.S. contact Plantronics at 800.544.4660 x5538 and in Canada call (800) 540-8363.
How does state law apply?****
– This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.
345 Encinal Street
Santa Cruz, California 95060
(800) 544-4660
www.plantronics.com
© 2002-2003 Plantronics Inc. All rights reserved. Plantronics, the logo design, Plantronics and logo design combined, and Quick Disconnect are trademarks or registered trademarks of Plantronics Inc. All other trademarks are the property of the respective owners. Patents US 5,259,780 Printed in the USA. 63719-01 (2-03)