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Bluetooth Wireless Headsets
Bluetooth enables low-bandwidth wireless connections within a range of 66 feet (20 meters).
The best performance is in the 3- to 6-foot (1- to 2-meter) range. Bluetooth wireless technology
operates in the 2.4 GHz band, which is the same as the 802.11b/g band. Interference issues
can occur. We recommend that you:
•
Use 802.11a, 802.11n, or 802.11ac that operates in the 5 GHz band.
•
Reduce the proximity of other 802.11b/g devices, Bluetooth devices, microwave
ovens, and large metal objects.
The Cisco IP Phone uses a shared key authentication and encryption method to connect with
headsets. The Cisco IP Phone can connect with up to 50 headsets, one at a time. The last
connected headset is used as the default. Pairing is typically performed once for each headset.
After a device is paired, the Bluetooth connection is maintained if both devices (phone and
headset) are enabled and within range of each other. The connection typically reestablishes
itself automatically if either of the devices powers down then powers up. However, some
headsets require user action to reestablish the connection.
The Bluetooth icon
Potential interference issues can occur. We recommend that you reduce the proximity of other
802.11b/g devices, Bluetooth devices, microwave ovens, and large metal objects. If possible,
configure other 802.11 devices to use the 802.11a channels.
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 can affect the connection. Interference from
other electronic devices can also affect performance.
When headsets are more than 30 feet (10 meters) away from the Cisco IP Phone, Bluetooth
drops the connection after a 15- to 20-second timeout. The paired headset reconnects when it is
comes back into range of the Cisco IP Phone. For certain phone types that operate in power-
save modes, you can wake up the headset by tapping on the operational button.
Enable the headset before you add it as a phone accessory.
The phone supports various Handsfree Profile features that allow you to use devices such as
Bluetooth wireless headsets for certain tasks. For example, instead of pressing Redial on the
phone, you can redial a number from the Bluetooth wireless headset by following instructions
from the headset manufacturer.
Cisco IP Phone 8841/8851 Multiplatform Phones User Guide
indicates that Bluetooth is on, whether a device is connected or not.
Bluetooth Wireless Headsets
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