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When you plug in your headset, lower the volume of the headset speaker before you put the headset on. If
you remember to lower the volume before you take the headset off, the volume will start lower when you
plug in your headset again.
Be aware of your surroundings. When you use your headset, it may block out important external sounds,
particularly in emergencies or in noisy environments. Don't use the headset while driving. Don't leave your
headset or headset cables in an area where people or pets can trip over them. Always supervise children who
are near your headset or headset cables.
Standard headsets
You can use a wired headset with your phone. The headset requires a 3.5 mm, 3-band, 4-connector plug.
We recommend the Cisco Headset 520 Series. These headsets offer outstanding audio performance. For more
information about the headset, see
If you plug a headset into the phone during an active call, the audio path automatically changes to the headset.
Bluetooth headsets
You can use a Bluetooth
usually increases battery power consumption on your phone and may result in reducing battery life.
For a Bluetooth wireless headset to work, it does not need to be within direct line-of-sight of the phone, but
some barriers, such as walls or doors, and interference from other electronic devices, can affect the connection.
We recommend the Cisco Headset 560 Series and Cisco Headset 730. These headsets offer outstanding audio
performance. For more information about the headsets, see
Series.
Desktop chargers
The following desktop chargers are compatible with your phone.
However, the desktop chargers for the Cisco Wireless Phone 840 and Cisco Wireless Phone 860 are not
interchangeable.
Caution
Cisco Wireless Phone 840 and 840S
The Cisco Wireless Phone 840 and 840S also have two types of desktop chargers.
Table 31: Desktop chargers
Charger name
Cisco Wireless Phone 840 Desktop Charger
Cisco Wireless Phone 840 Desktop Dual Charger
®
headset with your phone. When you use a Bluetooth wireless headset, the headset
Use only the approved chargers and power supplies for your phone.
Cisco Headset 500
Series.
Cisco Headset 500 Series
Charger capacity
One 840 phone
One 840 phone and one 840 battery
Cisco Wireless Phone 840 and 860 User Guide
Standard headsets
and
Cisco Headset 700
117
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