freemate DA-275 User manual

Telephone Headset
Amplifier
Owner s Manual
(DA-275)

[03]
Introduction
Your new headset amplifier is a device that helps you to use your
telephone, computer and external audio device through a headset.
It gives you hands free, fatigue-free conversation, Internet phone
call and listening music from computer soundcard or the external
audio device through a headset at the same time.
Please read this manual carefully that you can quickly learn the
functions provided.
1. Features & Overview
2. How to install
Stage 1. Installing batteries
Stage 2. Connecting to your telephone, headset and Computer
3. How to test before use
Stage 1. Checking for telephone use
1. Compatibility setting between telephone and amplifier
2. Adjustment of listening / transmission volume
3. Adjustment of dip switch (=Transmission level)
4. Adjustment of tone control switch
Stage 2. Checking for computer use(DA-275ONLY)
1. Stereo/Mono selection switch
2. PC listening volume controller
3. Operating for internet call
4. Operation
5. Troubleshooting
6. Warranty

[04]
1. Features & Overview

[05]
1. Tel/PC button(DA-275 ONLY)
Press it for telephone, internet
phone and computer(or Audio) use
Depress it for telephone use only.
2. Main Listening Volume
Controller
You can increase or reduce the
volume of your caller s voice
and audio from PC.
3. Handset / Headset Button
Press it for handset use and
depress it for headset use.
4. Battery test indicator
Press mute button, if it does not
right, replace all batteries.
5. Mute Button
(DA-275 ONLY)
(= Battery test)
Press the button to cut off the
microphone temporarily. Just
depress the button to resume
communication with your caller.
If the battery test indicator does
not light by pressing mute
button, replace all the batteries.
(Operational battery life : not
less than 2,000 hours)
6. External power supply jack
( )
You can use AC power adapter
(3V DC) instead of battery.
7. Handset Jack (HANDSET)
Connect your handset to this
jack.
8. Telephone jack (TEL)
Connect a telephone curly cord
supplied between the handset
jack of your telephone and
amplifier.
9.
External computer or Audio
device jack (PC) (DA-275 ONLY)
Connect a computer cord
supplied between computer or
audio and amplifier.
10. Stereo Jack for Recorder
The Stereo plug of recorder can
be connected (Option).
11. Telephone Compatibility
Switch
Compatibility setting between
telephone and amplifier.
12. Dip switch
Features

[06]
For transmission level and
dynamic microphone.
13. Transmission volume
controller
Set the volume controller by
sliding the knob when it
becomes optimal sound for your
caller.
14. Headset Jack
Connect your headset to this
jack.
15.
Tone Control Switch (DA-275 ONLY)
Set the tone control switch to be
bass or treble sound.
16. PC listening volume
controller
(DA-275 ONLY)
Adjust PC listening volume only
when it s low or loud.
17. Security cover
18. Battery cover
19. Telephone curly cord
Connect this cord between
telephone and amplifier.
20.
Computer cord (DA-275 ONLY)
Connect this cord between
computer(or audio device) and
telephone jack of amplifier.
21. Headset Hanger
22. Attenuated cord( Option)
Connect the attenuated cord
between stereo jack for recorder
and recorder s for call
recording.
23. Stereo/Mono Selection
Switch
(DA-275 ONLY)
Select the knob as per mono or
stereo you are going to use.

[07]
Stage 1. Installing Batteries
We recommend two AA alkaline
batteries (Not included) for installation.
Operational battery life are about 2,000
hours.
- Remove the battery cover on the
side of amplifier.
- Install two AA alkaline batteries
and replace the battery cover
- Press the Mute button to confirm if
the batteries are well fitted or not.
* Note : Alternatively, if you want to use AC power
supply (Not included), you can connect AC
adapter (3V DC OUT) to external power
supply jack. (Feature no.6).
Stage 2. Connecting to your
telephone, headset
and computer
1. Unplug your telephone s handset
cord from the telephone base and
plug it into the handset jack of
amplifier(Feature no. 7)
2. How to install

[08]
2. Connect a telephone curly cord
(Feature no.19) between the
handset jack of your telephone and
Telephone jack of amplifier
(Feature no.8)
3. Plug one complete headset to the
headset jack of amplifier (Feature
no.14) located on the front side of
the cabinet
Notes : When you use a monaural headset,
slide the knob to the right (M)(Feafure no.23)
And when you use a stereo headset supplied
by us slide to the left (S).
(DA-275 ONLY)
4. Connect a computer cord supplied
(Feature no. 20) between the PC
jack of amplifier (Feature no. 9) and
two jacks of Computer base or other
audio device.
(DA-275 ONLY)
Notes : It s an advanced function for internet
call, listening music from computer or external
audio device.
Red
Black

[09]
3. HOW TO TEST BEFORE USE
Stage 1. Checking for
telephone use
Wearing the headset, Lift the handset
from its cradle, position it off-hook and
listen.
1.Compatibility setting between
telephone and amplifier
If you can t hear dial tone at factory
setting, adjust the compatibility
switch between telephone and
amplifier as follows
1) Remove the Security cover which
is located on the side of amplifier.
2) Slide the compatibility switch by
clicks until you can hear a clear
dial tone.
3) If amplifier does not work with the
above compatibility,Your handset
may be a dynamic microphone.
Place Dip switch No. 2 to OFF
and adjust compatibility switch
again until you hear a dialtone as
the same manner.

[10]
2. Adjustment of listening
/ Transmission volume
Firstly, place the digit no.5 of listening
volume controller to the center and set
the white marking part of microphone
volume controller to the center.
After the above setting, if the unit is not
working properly, use the following
adjustments for the best set-up.
1) If there is beep sound, slide the
Transmission volume controller to
the right side(-) for low volume. And
if Listening / Transmission is low,
slide Transmssion volume
controller to the left(+) and increase
Listening volume controller at the
same time until they are increased
for proper level for your caller.
2) If there is humming tone, adjust
both Listening and Transmission
volume controller to the low volume
side at the same time.

[11]
3) If there is high pitched feedback
when the volume is set to normal
usage levels, adjust the distance of
headset boom between the
microphone head cap and your
mouth. The proper distance is one
inch apart from your mouth.
3. Adjustment of dip switch
( = Transmission level)
If the transmission volume is too big
or too low even though you did all
the above settings, it may be bad
telephone line condition or low
output of telephone transmission
level.
If the TX volume is too big, place
switch no.1 to “OFF” (factory set-
up) to decrease it.
If the TX volume is too low, please
switch no.1 to “ON” to increase it.
4. Adjustment of tone control
switch for all day long users with
telephone.
If you want to hear bass sound for
comfort, fix the control switch to the
right. If treble sound for clarity, fix it
to the left.

[12]
Stage 2. Checking for
Computer use
1. Stereo / Mono selection switch
1) When you use a monaural headset,
slide the knob to the right (M)
(Factory setting)
* Notes; you can hear very low sound if it
s positioned to the left(S) by
using monaural headset.
2) In a stereo headset supplied by us,
slide the knob to the left(S) to enjoy
stereo sound
* Notes ; If it s positioned to the right (M)
by using our stereo headset or if
it s not our supplied headset,it
cannot be properly worked. At
once, you should use our
specified stereo headset to
hear stereo sound.
2. PC listening volume controller (DA-275 ONLY)
1) Adjust listening volume of music,
internet phone from computer or
other audio device by sliding.
(DA-275 ONLY)

[13]
2) With the above adjustment if the
volume is still too low or high,
adjust the volume of soundcard in
computer.
3. Operation
1) To make an Internet phone call, a
telephone call, listen music from
computer and other audio device
at the same time.
(DA-275 ONLY)
Press TEL/PC button for internet
phone call, telephone call,and
computer music (or audio).
Adjust PC listening volume controller
for optimal sound and dial after tone.
You may need to adjust your
soundcard volume in Computer for
optimal performance.
In this case, the music does not
transmit tothe caller.
* Notes: In depressing Tel/PC button, it
can work only for telephone use.

[14]
2) To record a call
Connect an Attenuated Cord
(Feature No.22) optionally supplied
between Stereo jack for recorder
and your computer or exterior
recorder. Operated recording
function of the computer or exterior
recorder. You may need this record
for your job references or to report
the record to the other party or your
boss.
3) Mute
If you press Mute button during
telephone call, the music from
computer or audio device is
transmitted to the other party while
the microphone is cut off.

[15]
4. Operation
Receiving by headset : Depress the headset/handset
button(feature no.3), wear the headset. Lift the handset from its
cradle and place it "off hook" when the telephone rings. You can
answer the telephone by headset.
Making a call by headset : Depress the headset /handset button
(feature no.3), wear the headset.
Lift the handset from its cradle and place it "off hook" and dial after
listening tone signal. To terminate a call, hang up the telephone
handset.
Handset use : Press the headset /handset button (feature no.3), lift
the handset, dial after listening dial tone.
* Off hook lever use( option) : "Off-hook Lever" eliminates the need
for you to lift the handset, just pull the lever when the telephone
rings, you can talk with the caller without completely removing the
handset from its cradle.
Remarks : if your telephone has a program for "headset" use or a
switch that can be used by headset, you won't need to lift the
handset every receiving or call. Just press a button for making or
receiving a call. The telephone that has the headset-use button will
vary from one telephone to another, but most often it is the "line
button".
Check your telephone's manual for details. Most of key phone
systems have this program.

[16]
5. TROUBLESHOOTING
The following information covers common problems and suggests
solutions.
If the amplifier and headset are not operating properly, follow the
suggestions in this section
CALLERS CAN’T HEAR ME AND I CAN’T HEAR MY CALLERS
1. Check the installation. Check all cords are properly connected.
2. Check the Handset / Headset button. Push the button down for
handset use, and push-up for headset operation.
CALLER’S VOICE IS LOW OR DISTORTED.
1. Adjust the Listening Volume Controller on the amplifier.(feature no.2)
2. If there is a dip switch on the side of your amplifier, set to the
correct position as per the instruction manual.(feature no.12)
3. Replace your batteries. For best results, use Duracell alkaline
batteries.
CALLERS CAN’T HEAR ME, BUT I CAN HEAR THEM.
1. Be sure the microphone is properly positioned, about one inch
from the corner of your mouth.
2. Adjust the Transmission volume controller (Feature no.13)

[17]
THE PEOPLE I’M TALKING TO SAY I SOUND UNCLEAR OR
TOO FAR AWAY.
Adjust the position of your microphone.
The best place for the microphone is not directly in front of your
mouth, but near the corner of it, smiliar to the way you position the
telephone handset. In this position, you can pick up the sound
waves from your speech, but not the air moving from your mouth
and nose.
MY VOICE ECHOES OR I SOUND LIKE I’M IN A TUNNEL
Slide the Transmission volume Controller to the left side for a lower
volume.

[18]
WARRANTY
We will repair or replace, at our opinion, this product if found
defective due to materials or workmanship within the warranty
period beginning from the original date of purchase. This product is
warranted by authorized representative for the period specified.
The original dated purchase receipt must be presented to the
authorized service center when service is rendered.
On all carry-in models, transportation to and from the service station
is the responsibility of the purchaser.
This warranty does not cover damages due to
accident,fire,flood,earthquake and/or other acts of God; misuse,
incorrect line voltage, improper installation, improper or
unauthorized repairs, commercial use or damages occurred in
shipping.
Exterior and interior finish, lamps, glass, plastics parts and
temperature probes are not covered under this warranty.
Customer adjustment according to the owner's manual are not
covered under this warranty.
This warranty is automatically void if the serial number is missing or
altered.

WARRANTY CARD
Note : THIS WARRANTY CARD WILL BE VOID IF IT IS
NOT MAILED BACK TO OUR COMPANY WITHIN
10 DAYS FROM DATE OF PURCHASE,
WARRANTY CONDITIONS
(PLEASE SEE OVERLEAF)
Mr./Mrs./Miss/Co.
Telephone No.
Address
Model No.
Brand
Serial No.
Invoice No.
Dealer
Date of Purchase