Product Safety and Security
Cisco IP Phone 8841/8851 Multiplatform Phones User Guide
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Bluetooth devices, microwave ovens, and large metal objects away from the wireless headset.
The Bluetooth wireless headset does not need to be within direct line-of-sight of the phone.
However, some barriers, such as walls or doors, and interference from other electronic devices,
can affect the connection.
Ways to Provide Power to Your Phone
You can provide power to your phone in one of these ways:
•
Use the power adapter that comes with your phone.
•
If your network supports Power over Ethernet (PoE), you can plug your phone
into the network. Plug an Ethernet cable into the Ethernet phone port and into
the network.
If you are not sure whether your network supports PoE, check with your administrator.
Phone Behavior During Times of Network Congestion
Anything that degrades network performance can affect phone audio and video quality, and in
some cases, can cause a call to drop. Sources of network degradation can include, but are not
limited to, the following activities:
•
Administrative tasks, such as an internal port scan or security scan
•
Attacks that occur on your network, such as a Denial of Service attack
UL Warning
The LAN/Ethernet cable or other cables attached to the device should not be extended outside
of the building.
EnergyStar
The Cisco IP Phone 8841 and 8851 have EnergyStar certification.
