Sennheiser BW BW 900 User manual

Instruction Manual
BW 900

Contents
2
Wireless System BW 900
Contents
Safety information.......................................................................................... 4
Intended use ..................................................................................................... 4
Observe the following instructions for the BW 900 system.................... 4
Related documents.......................................................................................... 5
Product description......................................................................................... 5
Adaptive Intelligence for optimal speech intelligibility............................ 5
ActiveGard™ for your well-being .................................................................. 5
Stylish and lightweight, with high wearing comfort................................. 5
More room to move ......................................................................................... 5
Optimum connectivity..................................................................................... 5
Non-stop talking .............................................................................................. 6
Delivery includes ............................................................................................. 6
Operating elements ........................................................................................ 7
BW 900 base station....................................................................................... 7
BW 900 headset............................................................................................... 7
Button overview.............................................................................................. 8
Setting up the BW 900 system ..................................................................... 9
Setting up the headset ........................................................................................ 9
Inserting the battery into the headset ........................................................ 9
Adapting the headset to your ear ................................................................ 9
Setting up the base station ................................................................................ 9
Connecting the base station to the office phone....................................... 9
Connecting a handset lifter to the BW 900 system (optional).............10
Testing the setup ...........................................................................................10
Testing the handset lifter setup (optional) ..............................................10
Adjusting the BW 900 to your office phone .............................................11
Connecting the headset to other Bluetooth devices (pairing)..............11
Connecting the BW 900 system to a PC (optional) .................................12
Summary of settings .................................................................................... 13
Basic settings................................................................................................. 14
Switching the headset on/off...........................................................................14
Switching the base station on/off...................................................................14
Phoning.................................................................................................................15
Accepting incoming calls ..............................................................................15
Making calls with your office phone...........................................................15
Making calls with your Bluetooth device...................................................15
Voice dialling...................................................................................................16
Redialling.........................................................................................................16
Terminating office phone calls ....................................................................16
Terminating mobile phone calls ..................................................................16
Setting the volume.............................................................................................17
Setting the speaker volume.........................................................................17
Changing the ring tone volume...................................................................17
Power management ...........................................................................................18
How long does the battery last? .................................................................18
Indications when the battery is about to run flat ...................................18
Charging the battery.....................................................................................18
Changing the battery during a call .............................................................19

Contents
3
If you leave the transmission range................................................................20
Leaving/entering the transmission range of the base station .............20
Leaving/entering the transmission range of the Bluetooth device .....21
Advanced settings ........................................................................................ 22
Call management ................................................................................................22
Redialling.........................................................................................................22
Toggling between calls via office phone and via mobile phone............22
Transferring calls between headset and phone .......................................22
Rejecting a call from the Bluetooth device................................................23
Muting...................................................................................................................23
Muting/unmuting the headset microphone .............................................23
Muting the ring tone .....................................................................................23
Listening to an external audio source.............................................................23
Activating/deactivating the adaptive volume adjustment........................24
Pairing...................................................................................................................24
Resetting the BW 900 system..........................................................................25
Maintenance and care .................................................................................. 25
Spare parts..................................................................................................... 25
Accessories..................................................................................................... 25
Specifications................................................................................................. 26
Overall system ................................................................................................26
Headset............................................................................................................26
Manufacturer declarations .......................................................................... 26
Warranty regulations....................................................................................26
CE Declaration of Conformity.......................................................................26
FCC statements...............................................................................................27
Batteries or rechargeable batteries............................................................27
WEEE Declaration ...........................................................................................27
Index ............................................................................................................... 28
We have designed this product to give you reliable operation over many
years. Over 60 years of accumulated expertise in the design and manu-
facture of high-quality electro-acoustic equipment have made Sennheiser
a world-leading company in this field.
Please take a few moments to read these instructions carefully, as we
want you to enjoy your new Sennheiser product quickly and to the full-
est.

Safety information
4
Safety information
The BW 900 system has been manufactured according to the accepted
rules of safety and current technology. However, there is still a danger of
damage to equipment if the following general safety instructions are not
complied with.
•Read these instructions completely before working with the BW 900
system.
•Keep these instructions in a location where they are accessible to all
users at all times.
•Always include the operating instructions when you pass the BW 900
system on to third parties.
Intended use
The BW 900 system is an accessory for fixed line phones, and Bluetooth-
enabled devices such as mobile phones, PCs and PDAs, allowing for wire-
less communication in office and home office applications.
It is considered improper use when the BW 900 system
•is used for any application not named in these instructions,
•is used under operating conditions that deviate from those described
in these instructions.
Observe the following instructions for the BW 900 system
•Never disassemble or modify components of the BW 900 system. The
right to disassemble or modify is reserved to authorized personnel.
This applies especially to all units connected to AC outlets. If units are
opened by customers in breach of this instruction, the warranty be-
comes null and void.
•The rechargeable battery used in this device may present a fire or
chemical burn hazard if mistreated. Therefore, do not disassemble,
heat above 100°C (212°F) or incinerate the battery.
•Sennheiser Communications is not liable for damages resulting from
the loss of connection.
•Use the BW 900 system in dry places only and keep liquids and small
electrically conductive parts away from the BW 900 system and its
connecting sockets.
•Set up the unit on an even surface and lay the cables in such a way
that nobody can pull the BW 900 system or your phone from the table
by accident.
•This equipment generates, uses and can radiate radio frequency en-
ergy 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 in-
stallation.
•When you are not using your headset, place it in the base station cra-
dle to recharge its battery.
•The rechargeable headset battery must be charged in the BW 900
base station, only! Never try to charge batteries other than those
specified for use with the BW 900 headset in the base station!
•Only to be used with Sennheiser Communications supplied approved
and certified power supply (EU 094707, UK 092892, US 092893, AUS
520334).
General instructions
Before assembly
During assembly
During operation

Product description
5
•For cleaning the BW 900 system, use a dry cloth only. Do not use any
solvents or cleansing agents.
•Dispose of used batteries according to the legal regulations of your
country.
Related documents
The BW 900 system may be used together with other Sennheiser Com-
munications system components. Also follow the instructions for the
other system components. This includes:
•the HSL 10 Handset Lifter for all types of fixed line phones
•the TCI 01 “Telephone Controlling Interface” for phones featuring an
AEI or DHSG interface
Product description
Adaptive Intelligence for optimal speech intelligibility
The new Bluetooth office headset BW 900 features unique Adaptive
Intelligence technology (patent pending) providing excellent sound qual-
ity. The BW 900 automatically compensates for ambient noise and “re-
members” the user's preferred settings. During conversation, these
settings are adapted automatically in order to compensate for fluctua-
tions in ambient noise levels.
Adaptive Intelligence also ensures that the interlocutor listening to the
headset user can enjoy optimum speech clarity.
ActiveGard™ for your well-being
The headset is equipped with ActiveGard™, a unique technology pat-
ented by Sennheiser Communications. It uses sophisticated sound pres-
sure limitation systems to actively safeguard your hearing against
acoustic shocks. A safe and comfortable sound level allows for stress-free
work with the headset.
Stylish and lightweight, with high wearing comfort
Its discreet design is another plus of this headset. The fashionable and
lightweight device is placed behind the user’s ear. As it is barely notice-
able, it is comfortable enough to wear it all day. It can be adjusted ergo-
nomically for a perfect fit on any ear. The BW 900 blue-and-charcoal
design is unobtrusive. The small microphone boom impairs neither the
user's freedom of movement nor his or her field of vision.
More room to move
BW 900 is a Bluetooth Class 1 device supporting the version 1.2 stan-
dard. It provides long-range operation and maximum compatibility. With
the base station connected to your office phone, you can roam around
the building up to a distance of 100 m. Additionally, you can move up to
10 metres away from your Bluetooth-enabled devices such as mobile
phones, PCs and PDAs.
Optimum connectivity
The Bluetooth interface allows the BW 900 to be connected to several
devices. Whether you are using a mobile phone or other phone types
such as smart phones or soft phones – the BW 900 is compatible with all
types of speech-based Bluetooth devices. The user-friendly pushbutton
Cleaning
Disposal

Delivery includes
6
interface provides for seamless changeover between your fixed line
phone and any Bluetooth-enabled phone paired.
Non-stop talking
Should the battery run flat while you are talking via your office phone,
you can easily replace it with a fully charged battery without terminating
your call. While no battery is being connected, the BW 900 base station
maintains the connection to the telephone line.
Delivery includes
1 BW 900 base station
1 BW 900 Bluetooth headset
1 rechargeable Li-polymer battery, partially pre-charged
3 speaker adjustment rings,
sizes S, M (pre-assembled on speaker) and L
1 phone connecting cable already plugged to base station
1 quick guide
1 CD with detailed instruction manual (PDF)
1 power supply
1 microphone windshield
1 battery dummy, inserted in the base station’s spare battery charging
slot

Operating elements
7
Operating elements
BW 900 base station
Headset/handset switch
Base station hook button
Headset charging LED
Spare battery charging LED
Hook LED
Mute LED
Spare battery charging slot
Headset cradle
Program button
Microphone volume knob
Telephone adjustment switch
HANDSET socket
PHONE socket
ACCESSORIES socket
DC IN socket
BW 900 headset
Microphone boom
Hinged speaker
Multi switch
Headset hook button
Battery compartment
Headset LED
Speaker adapters

Button overview
8
Button overview
Button Function See
Headset/handset switch 

•toggle between the office
phone handset (up position)
and the BW 900 headset
(down position)
page 14
Base station hook button 

•accept an incoming call
•end a call
page 15
page 16
Headset hook button 

•accept a call
•end a call
•toggle between Bluetooth
device and office phone
•redial with Bluetooth device
•activate voice dialling
page 14
page 16
page 22
page 22
page 15
Multi switch 
•adjust the volume (up/down)
•mute the headset micro-
phone or acoustic signals
(push)
•reject calls from the Blue-
tooth device (push)
•switch on/off (push until LED
flashes 3 x blue: on – red:
off)
page 17
page 23
page 23
page 14

Setting up the BW 900 system
9
Setting up the BW 900 system
Setting up the headset
Inserting the battery into the headset
fInsert the battery into the headset’s battery compartment.
The headset LED flashes blue every 5 seconds to indicate that the
headset is in standby mode.
Note
If the headset is not switched on automatically, the battery is flat and
must be charged as described under “Charging the battery” on
page 18.
Adapting the headset to your ear
fPut the headset on. You can wear the headset on either the left or
right ear without changing the headset.
fClose the speaker housing so that the headset firmly fits your ear.
fThen adjust to your own comfort level by opening the housing just a
few millimetres.
Note:
If the pre-installed speaker adapter size “M” does not fit your ear,
clip on the smaller or larger one.
fTurn the microphone boom towards your mouth. The optimal mi-
crophone position is two cm from the corner of the mouth.
Setting up the base station
Connecting the base station to the office phone
fDisconnect the handset Afrom your office phone, but leave it on the
phone.
fPlug the free handset cable connector to the BW 900 HANDSET
socket .
fConnect the cable which is already connected to the base station
(PHONE socket ) to the office phone socket where the handset cable
was connected before.
fConnect the power supply to the DC IN socket  and to the mains.
All LEDs light up for 2 seconds.
2cm

Setting up the BW 900 system
10
Connecting a handset lifter to the BW 900 system (optional)
When connecting a Sennheiser Communications handset lifter (see
“Accessories” on page 25):
fConnect the handset lifter Bto the ACCESSORIES socket .
fInstall the microphone as described in the handset lifter manual.
fAttach the handset lifter to the phone as described in the handset
lifter manual.
Note:
The BW 900 system also supports handset lifters from manufacturers
other than Sennheiser Communications but you require an additional
interface (TCI 01, see “Accessories” on page 25).
If your office phone features an AEI or a DHSG interface, you do not re-
quire any mechanical handset lifter but only the TCI 01 interface:
fConnect the TCI 01 as described in the TCI 01 manual.
Testing the setup
fMake sure the headset is in standby mode and the base station is in
transmission range (the headset LED flashes once every five sec-
onds).
fPress the headset/handset switch  to the “up” position
The connection to the handset is established.
fPick up the handset from your office phone.
If a dial tone is heard in the handset, the system is connected properly.
If no dial tone is heard, please refer to the next section.
Testing the handset lifter setup (optional)
fPut the headset in the headset cradle and wait until the headset
charging LED lights up.
fTake the headset out of the headset cradle .
The headset LED flashes once every 5 seconds to indicate that the
headset is in standby mode.
fPress the headset/handset switch  to the “down” position
The connection to the headset can be established.
fPress either the headset hook button or the base station hook but-
ton .
A wireless link is established between the headset and the base sta-
tion. The handset lifter lifts off the handset automatically and the dial
tone is heard in the headset.
If no clear dial tone is heard, please refer to the next section.



Setting up the BW 900 system
11
Adjusting the BW 900 to your office phone
To ensure optimum intelligibility, adjust the BW 900 system to your
phone as follows:
fPress the headset/handset switch to the “down” position.
The connection to the headset can be established.
fPut on the headset and adjust it for comfort.
fPress the headset hook button or the base station hook button .
A wireless link is established between the headset and the base sta-
tion.
fPick up the phone handset from its cradle.
fAdjust the telephone adjustment switch so that the dial tone can
be heard loud and clear in the headset.
fTurn the microphone volume knob to position 1.
fMake a test call to someone while adjusting the microphone sensitiv-
ity.
fSpeak to the other party by alternately using the handset (head-
set/handset switch is in the “up” position) and the headset (head-
set/handset switch is in the “down” position), always starting with
the handset.
fTurn the microphone volume knob so that the other party can hear
you at a comfortable level, whether you use the headset or the hand-
set.
fHang up the phone and press either the headset hook button d or the
base station hook button B.
Connecting the headset to other Bluetooth devices (pairing)
The headset is capable of being paired with up to three Bluetooth de-
vices:
•one base station (cannot be changed)
•one mobile phone (can be changed for another mobile phone)
•one PC or one PDA (can be changed for another PC or PDA, respec-
tively)
The Bluetooth devices must feature a “hands free profile” and “headset
profile”.
Notes:
As soon as you pair for example a new mobile phone, the old mobile
phone is no longer detected.
Certain features like redialling and voice dialling are only possible if
supported by the Bluetooth device.
fMake sure the headset is turned on and placed close to your Bluetooth
device.
fSet your Bluetooth device to Bluetooth pairing mode (see the manual
of your Bluetooth device).
fPress and hold down both the headset hook button and the multi
switch (in “push” direction) until the headset LED starts flashing
blue and red alternately.
The headset is in pairing mode.
Note:
If pairing is not successful within 60 seconds, the headset returns
automatically to standby mode.



4 Sec.

Setting up the BW 900 system
12
When your Bluetooth device prompts a keyword, enter four zeros
(0000).
When pairing was successful, the headset LED lights up blue 3
times. The headset acknowledges wi th a tone, and your Bluetooth de-
vice displays a message.
Note:
Call our support line at 800-923-0018 ext. 405 for pairing instructions for your
Bluetooth device.
Connecting the BW 900 syst em to a PC (optional)
For multimedia purposes or voice over IP (internet telephony), the
BW 900 base station can be connect ed to a computer. There are two
ways to connect to a PC:
•Connecting via the PC sound card – no oce phone connection:
you require a PC cable (see “S pare parts” on page 25)
•If you wish to connect via Bluetooth:
refer to “Connecting the headset to other Bluetooth devices” on page
11).
Please refer to the corresponding manual for setup information.

Summary of settings
13
Summary of settings
Function Button(s) to be actuated See
switching the headset on/off press and hold down for 4 seconds the multi switch in
“push” direction
page 14
activating the headset set the headset/handset switch to its “down” position page 14
activating the office phone
handset
set the headset/handset switch to its “up” position page 14
accepting an office phone call press the base station hook button or the headset hook
button and lift the handset
page 15
accepting a Bluetooth device
call
press and hold down the headset hook button until a
confirmation beep is heard in the headset
page 15
making an office phone call press the base station hook button or the headset hook
button and lift the handset, then dial
page 15
making a mobile phone call press the headset hook button , then dial page 15
voice dialling (if supported by
your Bluetooth device)
press and hold down the headset hook button until a
confirmation beep is heard, then speak
page 16
redialling the last number
(Bluetooth device only)
quickly press the headset hook button two times page 16
terminating an office phone
call
press the base station hook button or the headset hook
button and hang up the handset
page 16
terminating a Bluetooth device
call
press the base station hook button or the headset hook
button 
page 16
increasing the speaker volume
by one step
press the multi switch in “up” direction during the con-
versation
page 17
reducing the speaker volume
by one step
press the multi switch in “down” direction during the
conversation
page 17
increasing the ring tone vol-
ume by one step
press the multi switch in “up” direction while the phone
is ringing or in standby mode
page 17
reducing the ring tone volume
by one step
press the multi switch in “down” direction while the
phone is ringing or in standby mode
page 17
muting the ring tone on a call
from the office phone
press the multi switch in “push” direction – once muted,
the ring tone cannot be unmuted
Page 23
rejecting a call press the multi switch in “push” direction while the Blue-
tooth device is ringing
page 23
muting/unmuting the headset
microphone
press the multi switch in “push” direction during the
conversation
page 23
starting the pairing mode press and hold both the multi switch 
and the headset hook button for 4 seconds
page 24
deactivating the adaptive vol-
ume adjustment
press and hold the program button 
and the base station hook button for 4 seconds
page 23

Basic settings
14
Basic settings
Switching the headset on/off
In the office it is not necessary to switch off the headset. If you do not
want to use the headset:
fSimply place the headset in the headset cradle and set the head-
set/handset switch to the “up” position.
The headset is deactivated. Your office phone works as usual with the
handset.
To switch off the headset (e.g. when taken away from the base station):
fPress and hold down the headset multi switch for approx. 4 sec-
onds until the headset LED flashes red three times to indicate that
the headset is switched off.
Note:
All settings are saved when the headset is switched off.
To switch the headset on, either:
fPlace the headset in the headset cradle .
or:
fPress and hold the headset hook button for approx. 4 seconds until
the headset LED flashes blue three times to indicate that the head-
set is switched on. Then the headset LED flashes blue once every
5 seconds to indicate that the headset is in standby mode.
Switching the base station on/off
To switch the base station off:
fUnplug the power supply.







Basic settings
15
Phoning
Accepting incoming calls
When you receive a call either via your office phone or via your Bluetooth
device, you hear a ring tone in the headset. In addition, the headset
LED flashes quickly.
Note:
There are two different ring tone melodies:
•one ring tone melody for incoming calls from the office phone,
•another ring tone melody for incoming calls from the Bluetooth de-
vice.
It is not possible to change the ring tone melody.
To accept the call:
fPress either the base station hook button or the headset hook but-
ton .
A wireless link is established between the headset and the base sta-
tion.
fIf you receive a call via your office phone and no automatic handset
lifter is installed to your office phone, pick up the phone’s handset
manually. If an automatic handset lifter is installed, the handset lifter
picks up the handset automatically.
The link to the phone line is established.
fStart to talk.
Making calls with your office phone
fPress either the base station hook button or the headset hook but-
ton .
A wireless link is established between the headset and the base sta-
tion.
fIf no automatic handset lifter is installed to your office phone, pick up
the phone handset manually.
If an automatic handset lifter is installed, the handset lifter picks up
the handset automatically.
The link to the phone line is established and the dial tone is heard.
fDial the number and talk.
Making calls with your Bluetooth device
fPress and hold down the headset hook button until a beep is heard
in the headset.
A wireless link is established between the headset and your Bluetooth
device.
fDial the number and talk.





Basic settings
16
Voice dialling
The voice dialling function must be supported by your Bluetooth device.
Please refer to your Bluetooth device’s manual.
fMake sure the breaking-in of the voice dialling function is done with
the headset as the headset provides a better sound quality than most
Bluetooth device microphones do.
fPress and hold down the headset hook button until a confirmation
beep is heard.
fSay the name of the other party.
The Bluetooth device dials the corresponding number automatically.
Redialling
Automatic redialling the last number is only possible with certain Blue-
tooth devices. Please refer to your Bluetooth device’s manual.
fQuickly press the headset hook button two times.
The last dialled number is redialled.
Terminating office phone calls
fPress either the base station hook button or the headset hook but-
ton . The wireless link between the headset and the base station is
terminated.
fIf no automatic handset lifter is installed to your office phone, hang up
the phone’s handset manually. If an automatic handset lifter is in-
stalled, the handset lifter hangs up the handset automatically.
Terminating mobile phone calls
fPress the headset hook button . The wireless link between the head-
set and the mobile phone is terminated.
See your mobile phone manual whether your mobile phone terminates
the call automatically or you have to terminate the call manually.





Basic settings
17
Setting the volume
Use the multi switch to adjust the volume.
Setting the speaker volume
The adaptive volume adjustment function adjusts the volume automati-
cally, e.g. when you enter or leave a noisy environment. If you take cor-
rective action, the adaptive volume adjustment will memorize your
settings and apply them automatically next time.
The speaker volume can be adjusted between step 1 and step 9. The
factory setting is step 5. Your settings for your office phone and your
Bluetooth device are saved independently.
To manually increase the speaker volume:
fPush the multi switch in “up” direction during a conversation.
A confirmation beep is heard and the speaker volume is increased.
To manually decrease the speaker volume:
fPush the multi switch in “down” direction during a conversation.
A confirmation beep is heard and the speaker volume is decreased.
Changing the ring tone volume
The ring tone volume can be adjusted between step 1 and 9. The factory
setting is step 5. To be able to change the ring tone volume the headset
must be in standby mode or ringing.
To increase the ring tone volume:
fPush the multi switch in the “up” direction while the ring tone is
being heard in the headset.
One high frequency beep is heard in the headset. The ring tone volume
is increased by one step.
Note:
When the maximum volume is reached, two high frequency beeps are
heard.
To decrease the ring tone volume:
fPush the multi switch in the “down” direction while the ring tone is
being heard in the headset.
One low frequency beep is heard in the headset. The ring tone volume
is decreased by one step.
Note:
When the minimum volume is reached, two low frequency beeps are
heard.

Basic settings
18
Power management
How long does the battery last?
The battery life depends on the distance between headset and the base
station or Bluetooth device and corresponds to 4 to 5 hours of talk time.
To prevent the battery from running flat:
fPlace the headset in the headset cradle when you are not using it.
The battery is recharged.
Indications when the battery is about to run flat
When the battery is about to run flat:
•The hook LED flashes red three times every 15 seconds.
•The headset LED flashes red three times every 15 seconds.
•Three beeps are heard every 15 seconds, however, after three times
there is no further warning.
Note:
With every new connection either to the base station or to the Blue-
tooth device the warning sequence will start again.
Charging the battery
Note:
If you charge the battery for the first time, allow charging for at least
4 hours without interruption.
To charge the battery in the headset:
fPlace the headset in the headset cradle .
The headset charging LED lights up red to indicate that the battery
is being recharged. When recharging is complete, the headset charging
LED lights up blue.
To charge a second battery:
fInsert the battery in the spare battery charging slot .
The spare battery charging LED lights up red indicating the battery
is being recharged. When recharging is complete the spare battery
charging LED  lights up blue.
Note:
When – after 2-3 years – the battery capacity is reduced significantly,
replace the battery with a new one.







Basic settings
19
Changing the battery during a call
If you have a second, fully charged battery, you can replace a flat battery
even during an office phone call as follows:
Note:
Do not take the battery out of the headset during a Bluetooth device
call as this will interrupt the phone link immediately!
fTake the flat battery out of the headset.
The headset LED goes off and the hook LED lights up red indicat-
ing the headset is not received (out of transmission range).
The call is briefly interrupted, however, the call is held by the base sta-
tion for 40 seconds.
fTake the fully charged battery out of the spare battery charging
slot and insert it into the headset.
The headset LED flashes blue three times indicating the headset is
switched on. Subsequently the headset LED flashes blue once every
5 seconds to indicate that the headset is in standby mode and a ring
tone is heard via the headset.
fPress the headset hook button .
The call is resumed.
fInsert the flat battery into the spare battery charging slot .
The spare battery charging LED lights up red to indicate that the
battery is being recharged.






Basic settings
20
If you leave the transmission range
Telephoning is only possible in the Bluetooth transmission range of the
base station or the Bluetooth device, respectively. The transmission
range depends largely on environmental conditions like wall thickness,
wall composition etc. With a free line of sight, the transmission range of
the base station is up to 100 metres; the transmission range of the Blue-
tooth device is up to 10 metres.
upto10m
upto100m
Position APosition BPosition C
Position D
Indication
Headset is
in position base station
hook LED headset LED
Result
A no telephoning via
Bluetooth device
B
is off flashes blue once
every 5 seconds telephoning possible
via base station or
Bluetooth device
C
no telephoning via
base station but only
via Bluetooth device
D
lights up red
constantly
flashes blue twice
every 5 seconds,
two high frequency
beeps are heard in
the headset every
10 seconds
no telephoning via
base station or Blue-
tooth device
We recommend to make a test call to another person in the same office
and to walk around during the call to find out if any areas are out of
transmission range.
Leaving/entering the transmission range of the base station
If the headset leaves the base station transmission range during a call:
•The sound quality deteriorates before the connection finally brakes
down.
•The hook LED lights up red constantly to indicate that the headset
is out of the base station’s transmission range.

