User's Guide
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About the GN 9120
The GN 9120 is a cordless headset solution, made up of a cordless headset and a base 
unit that is connected to your telephone. The GN 9120 gives you full mobility, hands-
free convenience and superior sound quality for your telephone conversations.
Assembling 
To integrate the unit to your telephone: 
1.  Disconnect the handset cord from the telephone’s handset 
socket and connect it to the socket marked 0 on the base unit 
(1). 
2.  Connect the connection cord (8) to the telephone’s handset 
socket marked 1. 
3.  Connect the power adapter (9) to the socket marked 2 at the 
bottom of the base unit and then connect to a power socket.
4.  Insert the base unit into the foot (7) and turn until secure.
5.  If your telephone has volume control, set the volume to the 
middle setting.
6.  Place the headset into the base unit for battery charging.
Battery charging and assembly verifi cation
Initial battery charging
The battery in the headset is not initially charged and will require a 
minimum of 20 minutes of charging before use. It takes 1.5 hours 
before the battery is fully charged, providing up to 8 hours of talk 
time. 
The battery charging indicator (1d) on the base unit will fl ash con-
tinuously during charging and will light when the battery is fully 
charged.
Note: The headset may become warm during battery charging. 
This is normal and will not affect the safety or performance of the 
headset.
English - GN 9120 user guide
This user guide provides you with information and instructions on assembling, using 
and maintaining your GN 9120. This guide contains the following sections:
•  About the GN 9120
• Assembling
•  Battery charging and assembly verifi cation
•  Features and customisation
•  Answering and making telephone calls
• Frequently asked questions
•  Operational and safety information
Box contents:
1. Base unit
 1a) On-line indicator
 1b) Link-up indicator
 1c) Mute indicator
  1d) Battery re-charge indicator
 1e) Telephone  Termination 
Switch (back)
2. Headset
 2a) On-line indicator
  2b) Volume – button
 2c) Volume + button
 2d) Multifunction button
3. Headband
4. Earhook
5. Earplate
6. Earcushion
7. Base foot
8. Connection cord
9. Power adaptor
GN9120_contents_final.indd 2-3 20-11-2002, 12:29:03
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