DISCOVER D900 User manual

Manual D900 Wireless
Headsets

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A. Telephone Only base station
1. Battery Indicator
2. Auto answer disable button
3. Headset registration button
4. Online indicator
5. Power socket
6. EHS port
7. Telephone connector (’Tel’ port)
8. Handset connector
9. EHS Selection switch
10. Microphone volume up/down
11. Wiring switch

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B. Telephone/USB PC base station
1. Battery Indicator
2. PC button
3. Telephone (TEL) button
4. Online indicator
5. USB connector (PC port)
6. Power socket
7. EHS port
8. Telephone connector (’Tel’
port)
9. Handset connector
10. EHS Selection switch
11. Microphone volume up/down
12. Compatibility switch

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C. Discover D903
1. Receive volume up/down
2. Mute
3. Headset ON/OFF
4. Noise cancelling boom
5. Replaceable earplug
6. Battery

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D. Discover D901/D902
1. Receive volume up/down
2. Mute
3. Headset ON/OFF
4. Noise cancelling boom
5. Battery

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Contents:
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1. Product description
2. Setup
2.1 Connecting to a telephone or terminal with a headset port
2.2 Connection to a telephone or terminal without a headset port
2.3 Connecting to a compatible handset lifter (refer to your supplier)
2.4 Connecting EHS with DHSG protocols (refer to your supplier)
2.5 Connecting to a computer USB port (Models D901, D902, D903 only) 2.6
Wearing style
3. Operation
3.1 Making and receiving calls
3.1.1 Making an outgoing call in telephone mode
3.1.2 Receiving an incoming call in telephone mode
3.1.3 Making an outgoing call in VOIP mode (Models D901, D902, D903 only)
3.2 Adjusting the ring volume
3.3 Muting the headset microphone
3.4 Headset transmitting volume setting
3.5 Adjusting headset receive volume
3.6 Out of range and reconnection
3.7 Battery level indication
3.8 Making a conference call
3.9 Registering headsets to the base
3.10 Using multiple headsets
3.11 Using the D900 series with Microsoft Lync (Models D901, D902 and D903
only) 3.12 Switching Off Auto Pickup Mode (Telephone only base station) 3.13
Overview of audio signals
4. Troubleshooting 15

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1. Product description
The Discover D900 series is a fully wireless headset solution offering the user the
ability to work ‘handsfree’ with true wireless mobility.
Main features:
ŸDECT wireless headset solution
ŸUniversal headset base
ŸUp to 9 hours talk time without recharging
ŸEco-Low Radiation Dect with dynamic power adjustment
ŸAuxiliary port for connecting handset lifter or electronic hookswitch device
ŸNoise cancelling microphone for reduced background noise
ŸSecure high quality audio
ŸReceive volume control on headset
ŸMute button on headset
ŸTalk button with LED on headset
ŸMagnetic charging unit
ŸOperating Range up to 400m/1300 ft (Over-the-ear headset up to 300m)
Ÿ‘Out of range’ warning
ŸDECT 6.0/GAP compatible
ŸDHSG protocol
ŸPC/USB connectivity * (Models D901, D902 and D903 only)
ŸThree way conferencing by connection additional headset
* Will connect to Apple Mac OS X or PC running Windows XP, Windows Vista,
Windows 7, 8 & 10.

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2. Setup
Ÿ Connect the power adaptor supplied with the product to the base unit.
The base power LED with light.
NOTE: The first time you use your headset, it is recommended that the headset is charged
for a minimum of 4 hours before use.
2.1 Connecting to a telephone or terminal with a headset port
Ÿ Using the headset cord supplied with the product, connect the 'Tel' port on headset
base with the headset port on your telephone.
Ÿ Use the power adaptor supplied with the product to connect the headset base to a
power socket.
Ÿ You may need to adjust the wiring switch that is located on the bottom of the
headset Base to find the correct wiring for your device.
2.2 Connecting to a telephone or terminal without a headset port
Ÿ Using the headset cord supplied with the product, connect the 'Tel' port on headset
base with the 'handset' port on your telephone.
Ÿ Connect the telephone handset cord to the handset port on the headset base.
Ÿ Use the power adaptor supplied with the product to connect the headset base to a
power socket.
Ÿ You may need to adjust the wiring switch that is located on the bottom of the
headset base to find the correct wiring for your device.
2.3 Connecting to a compatible Handset Lifter (refer to your supplier)
Ÿ Fit the handset lifter to your telephone as indicated in its user guide.
Ÿ Connect the handset lifter to the 'AUX' port located on the back of the Headset Base.
Ÿ Ensure that the EHS selection switch is set to ‘RHL’.

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2.4 Connecting EHS with DHSG protocols (refer to your supplier)
ŸConnect the Discover DHSG cable to your telephone as indicated in its user guide.
ŸConnect the Discover DHSG cable to the ‘AUX’ and ‘Tel’ ports located on the back of the
headset base.
ŸEnsure that the EHS selection switch is set to ‘DHSG’.
With the handset lifter or DHSG cable connected, you will be able to answer and end calls using
the button located on the headset while away from your desk.
2.5 Connecting to a computer USB port (Models D901, D902 and D903 only)
ŸConnect the USB cable supplied with the product to the 'USB' port on the back of the
headset base and to an available USB port on your computer.
Ÿ· The computer should automatically recognize the device and install the correct drivers.
Wait a few seconds before using the headset.
2.6 Wearing Style
The Discover D900 series is available in three headset variants:
ŸDiscover D903 (Over-The-Ear)
ŸDiscover D901 (Monaural)
ŸDiscover D902 (Binaural)
To replace the earplug of the Discover D903 Over-the ear headset, twist the earplug 90 degrees
and pull the earplug towards you.
To replace the ear cushion of the Discover Over-the-head monaural or binaural, put your thumb
on the top of the speaker and carefully pull the ear cushion at the bottom towards you.

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3. Operation
3.1 Making and Receiving Calls
3.1.1 Making an outgoing call in Telephone mode
Ÿ Ensure that the 'TEL' button on top of the headset base is selected.
Ÿ Lift the headset from the base to start a call. If you are already wearing the headset,
press the headset’s ‘ON/OFF’ button. The base 'Online Indicator' LED will light. If a
handset Lifter or Electronic Hookswitch device is connected to the headset base, the
line will be seized. Otherwise, you will also need to activate the Headset port via your
telephone terminal.
Ÿ Dial the telephone number on the telephone terminal
Ÿ After finishing the call, replace the headset on the base or press the ON/OFF button
to disconnect. The 'Online indicator' LED will turn off.
3.1.2 Receive an incoming call in Telephone mode.
Ÿ If there is an incoming call from the telephone line and the headset base is connected
to a handset lifter or Electronic Hook switch device, the 'TEL' LED and 'headset' LED will
flash, also a ring tone will be heard on the headset.
Ÿ Lift the headset from the base to answer the call. If you are already wearing the
headset press the headset’s ‘ON/OFF’ button . The base 'online indicator' LED will light.
If a handset Lifter or Electronic Hookswitch device is connected to the headset base,
the line will be seized. Otherwise, you will also need to activate the headset port via
your telephone terminal.
Ÿ To end the call, replace the headset on the base or press the headset ON/OFF button.

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3.1.3 Making an outgoing call in USB/PC mode (Models D901, D902 and D903 only)
ŸEnsure that the 'PC' button on top of the headset base is selected.
ŸLift the headset from the base or press the headset's ON/OFF button if you are already
wearing it and the base 'On line indicator’ LED will light.
ŸAfter finishing your call, press the ON/OFF button to disconnect. The base ‘Online
indicator’ LED will turn off.
3.2 Adjusting the Ringing Volume
When the headset is ringing to indicated an incoming call, you can adjust the ring volume
using the volume control buttons located on the headset.
3.3 Muting The Headset Microphone
To mute the headset microphone when on a call, press the 'Mute' button on the headset.
While the headset is in Mute mode, a short beep will be heard on the headset every 8 seconds.
Press the 'Mute' button again to release the mute.
3.4 Headset transmitting volume setting
You can adjust the transmit volume of the headset by using the two buttons located on the
bottom of the headset base.
3.5 Adjusting Headset Receive Volume
Use the volume control buttons on the headset to adjust the receive volume on your headset.
You will hear a beep sound for each volume step Up or Down.
3.6 Out of range and reconnection
You will hear a warning tone in the headset when you walk out of range of the base. The
headset will be disconnected from the base and the call will be automatically placed on hold. If
you move back inside the range of the base the headset will automatically reconnect.

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< 20%
20%-40%
40%-60%
60%-80%
80%-100%
3.7 Battery Level Indication
The four LED's (8) on the top of the headset base indicate the battery level of your headset.
3.8 Making A Conference Call
Your Discover D900 Wireless Headset allows for a second headset to be temporarily
connected to the base so that you can have a three way conference call.
ŸSetup the call using the primary headset unit.
ŸOnce on the call, place the second Discover headset unit on the base charger.
ŸAfter one second, the ‘Online indicator’ LED of the new headset will turn on and the base
' Online indicator' LED will flash to indicate the headset is registering with base unit.
ŸOnce the registering has completed, the base ‘Online indicator’ LED will stop flashing
and the additional headset LED will flash.
ŸOnce the registration has completed, a confirmation sound will be heard on the primary
headset.
ŸLift the additional headset from the base and it will enter talk mode.
NOTE: The additional headset will only remain registered to the base for the duration of the
call. After the primary headset has ended the call, the unit will return to its normal state.
Models D903, D902 and D901 only
The Discover D900 headset also allows you to make a conference call between your normal
phone and a computer. To activate this option hold down the PC/USB button on the base
for four seconds. The LED’s of the PC/USB and TEL buttons will light. If one of the buttons is
pressed again this function will be turned off.

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3.9 Registering headsets to the base
Up to three headsets can be registered permanently to the D900 base. You can register a
new headset unit to your base using the following procedure.
ŸPress and hold the 'TEL' or ‘Registration’ button on the headset base for five seconds to
enter the registration mode. The 'TEL' LED will flash to indicate it is in registration mode.
ŸPress and hold the 'Headset ON/OFF' button on the headset for five seconds for the
headset to enter registration mode.
ŸThe headset will now be registered to the base which will take around 30 seconds. When
the registration has completed, the base ‘TEL’ LED will stop flashing.
The additional 2 auxiliary headsets can be registered using the same procedure but instead of
the ‘TEL’ button, use the microphone ‘Up’ button for headset 2 and the microphone ‘Down’
button for headset 3. These can be found on the underside of the headset base.
3.10 Using multiple headsets
If you have more than one headset registered to the D900 base, the first headset to be turned
on becomes the primary headset and takes control of the base. Another headset can then join
and leave the call by the user pressing their headset buttons, but only the primary headset can
end the call. NOTE: Only one of the two additional headsets can connect at any one time.
3.11 Using the Discover D900 headset with Microsoft Lync (Models D901, D902 and D903 only)
When your D900 is connected to a PC using the USB cable, it can interact with Microsoft
Lync/Skype For Business communication software installed on your PC. The headset button can
be used to answer and end a call and if you activate and finish a call using the desktop software
the headset will automatically turn on and turn off.
This function can be enable or disable as follows:
To enable MS Lync/Skype For Business - Press USB and microphone ‘+’ buttons together for 3
seconds. The USB LED will flash twice (fast) 6 times to confirm the function is enabled.

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To disable MS Lync/Skype For Business - Press USB and microphone ‘-’ buttons together for 3
seconds. The USB LED will flash 6 times to confirm the function is disabled.
Default setting is MS Lync/Skype For Business enabled.
3.12 Switching Off Auto Pickup Mode
Telephone Only base station
The headset turns on automatically when taking the headset from the base. This function can be
disabled If the ‘auto answer disable’ button (2) is pressed, the LED will light and the headset auto
answer mode will be disabled.
Telephone/USB PC base station
On the Telephone/USB PC headset models the auto answer can be toggled on and off by
pressing the headset volume Up and down buttons together for 3 seconds.
· LED will flash slowly to show Auto Answer ON
· LED will flash quickly to show Auto Answer OFF
Default setting is Auto Answer OFF.
3.13 Overview of audio signals
Action
2 beeps
1 beep
1 beep

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4. Troubleshooting
Q. I have connected my headset base to my telephone terminal but the headset is not working.
A. Make sure that the battery has been properly charged.
Q. The headset is working but I cannot hear telephones calls correctly.
A. Ensure that you have the correct wiring setting by adjusting the switch on the bottom of the
headset base.
Q. When the headset's ON/OFF button is pressed, the handset lifter lifts the handset but I cannot
hear the call on the headset.
A. Ensure that the headset base is connected to the telephone's handset port and not the
headset port (If the telephone has one).
Health and safety instructions
Please read the following safety and operational instructions before using your Discover headset
product. Please keep these instructions for your reference. When using this product, these basic
safety precautions and warnings should be followed to reduce the risk of fire, electric shock,
injury to persons and damage to property.
General
Operating, charging and storage temperature is 32°F to 104°F (0°C to 40°C).
Warnings
ŸCHILDREN. Never allow children to play with the product – small parts may be a choking
hazard.
ŸPlug the AC adapter into the outlet nearest the equipment that is easily accessible.
ŸTo reduce the risk of electric shock, explosion or fire, use only the supplied charger or Class 2
AC adapter to charge the headset. Ensure that the voltage rating (e.g. 120V, 60 Hz)
corresponds to the power supply you intend to use.
ŸFor safety reasons always tie back long hair that might get caught in the headset.

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ŸDo not disassemble the product or AC adapter as this may expose you to dangerous voltages
or other risks. Incorrect reassembly can cause electric shock or fire when the product is
subsequently used.
ŸDo not insert anything into the product because this may cause damage to the internal
components or cause injury to you.
ŸAvoid contact with liquids. Do not locate this product near water, for example, near a bathtub,
or sink, in a wet basement, or near a swimming pool.
ŸDiscontinue use of product and contact Discover Headsets if the product overheats, has a
damaged cord or plug, if the product has been dropped or damaged, or if the product has
come into contact with liquids.
ŸThis product should never be placed over or near a heat register and should not be placed in
locations without which do not have proper ventilation.
ŸIf you experience a skin irritation after using this product, discontinue use and contact
Discover Headsets.
ŸExposure to high volume sound levels or excessive sound pressure may cause temporary or
permanent damage to your hearing. Although there is no single volume setting that is
appropriate for everyone, you should always use your headset with the volume set at
moderate levels and avoid prolonged exposure to high volume sound levels. The louder the
volume, the less time is required before your hearing could be affected. You may experience
different sound levels when using your headset with different devices. The device you use and
its settings affect the level of sound you hear. If you experience hearing discomfort, you
should stop listening to the device through your headset and have your hearing checked by
your doctor.
To protect your hearing, some hearing experts suggest you:
1. Set the volume control in a low position before putting your headset on your ears and use as
low volume as possible.
2. Avoid turning up the volume to block out noisy surroundings. Whenever possible, use your
headset in a quit environment with low background noise.
3. Limit the amount of time you use headsets at high volume levels.
4. Turn the volume down if the sound from the headset prevent you from hearing people
speaking near you.

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To avoid the risk of electric shock, explosion, fire or leakage of corrosive or toxic chemicals,
please observe the following charging and battery warnings:
Charging warnings
ŸUse only the charger supplied by Discover Headsets to charge the product. Do not use
the charger for any other purpose. Ensure that the voltage rating corresponds to the
power supply you intend to use.
ŸCharge the headset according to the instructions supplied with the unit.
ŸPlug the AC adapter or charger into an outlet that is near the equipment and will be
easily accessible.
ŸNever charge the battery where the temperature may fall below 0°C (32°F) or rise above
40°C (104°F) – for example in an unattended motor vehicle.
ŸAvoid charging the battery while it is unattended.
Headset battery warnings
The headset is equipped with a replaceable battery. To reduce the risk of fire or injury to
persons read and follow these instructions.
Do not attempt to open battery in a fire. The battery may explode. Check the local laws for
disposal instructions.
Do not open or mutilate the battery. There may be corrosive materials which can cause damage
to eyes or skin and may be toxic if swallowed.
Charge the headset according to the instructions supplied with the headset.
RECYCLING: the battery used in your headset must be recycled or disposed of properly. Contact
your local recycling centre for propel disposal of your headset.

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Do not use this equipment in places where volatile or explosive materials may be present.
This equipment will be inoperable if mains power fails. For indoor use only.
When using your telephone equipment, basic safety precautions should always be followed
to reduce the risk of fire, electric shock and injury to persons, including the following:
ŸDo not use this product near water, for example a bath tub, wash bowl, kitchen sink or
laundry tub, in a wet basement or near a swimming pool.
ŸAvoid using a telephone (other than a cordless type) during an electrical storm. There
may be a remote risk or electric shock from lightening.
ŸDo not use the telephone to report a gas leak in the vicinity of the leak.
ŸUse only the power cord and batteries indicated in this manual. Do not dispose of
batteries in a fire. They may explode. Check with local codes for possible special
disposal instructions.
CAUTION:
Risk of explosion if battery is replaced by an incorrect type.
Dispose of used batteries according to instructions.
Use only with (D901, D902 and D903) (3.7 V, 200 mAh Li-ion rechargeable battery).
Supplied adaptor with ferrite must be used with this device to ensure compliance with the
class B FCC limits.
This device complies with Part 15 of the FCC rules. Operation is subject to the following
two conditions: (1) This device may not cause harmful interference, and (2) this device must
accept any interference received, including interference that may cause undesired
operation.
Warning: Changes or modifications to this equipment not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.
IMPORTANT SAFETY INSTRUCTIONS

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Note: This equipment has been tested and found to comply with the limits for a class B
digital device, pursuant to Part 15 of the FCC rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications.
However, there is no guarantee that interference will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:
ŸReorient or relocated the receiving antenna.
ŸIncrease the separation between the equipment and the receiver.
ŸConnect the equipment into an outlet on a circuit different from that to which the
receiver is connected.
ŸConsult the dealer or an experienced radio/TV technician for help.
To maintain the compliance with FCC’s RF exposure guideline, place the base unit at least
20 cm from nearby persons.
This equipment complies with Part 68 of the FCC rules and the requirements adopted by
the ACTA. On the bottom of this equipment is a label that contains, among other
information, a product identifier in the format US: AAAEQ##TXXXX. If requested, this
number must be provided to the telephone company.
An applicable certification jacks Universal Service Order Codes (USOC) for the equipment
is provided (i.e RJ9) in the packaging with each piece of approved terminal equipment. A
plug and jack used to connect this equipment to the premises wiring and telephone
network must comply with the applicable FCC Part 68 rules and requirements adopted by
the ACTA. A compliant telephone cord and modular plug is provided with this product. It
is designed to be connected to a compatible modular jack that is also compliant.

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See installation instructions for details.
If this equipment Discover D900 causes harm to the telephone network, the telephone
company will notify you in an advance that temporary discontinuation of service may be
required. But if advance notice isn’t practical, the telephone company will notify the
customer as soon as possible. Also, you will be advised of your rights to file a complaint
with the FCC if you believe it is necessary.
The telephone company may make changes in its facilities, equipment, operations or
procedures that could affect the operation of the equipment. If this happens the telephone
company will provide advance notice in order for you to make necessary modifications to
maintain uninterrupted service.
Should you experience trouble with this equipment in the US, please contact:
Merritt Communications
3065 Kilgore Rd.
Rancho Cordova, CA 95670
www.merrittcomm.com
1-800-683-5715
For repair or warranty information. If the equipment is causing harm to the telephone
network, the telephone company may request that you disconnect the equipment until the
problem is resolved. Please follow instructions for repairing if any (e.g battery replacement
section) otherwise do not alternate of repair any parts of the device except specified.
Save these instructions