Bluetooth Wireless Headset Performance; Ways To Provide Power To Your Phone; Phone Behavior During Times Of Network Congestion - Cisco 6800 Series User Manual

Bluetooth Wireless Headset Performance

Depending on the quality of these devices and their proximity to other devices, such as mobile phones or
two-way radios, some audio noise may still occur. In these cases, we recommend that you take one or more
of these actions:
• Move the external device away from the source of the RF or AF signals.
• Route the external device cables away from the source of the RF or AF signals.
• Use shielded cables for the external device, or use cables with a better shield and connector.
• Shorten the length of the external device cable.
• Apply ferrites or other such devices on the cables for the external device.
Cisco cannot guarantee the performance of external devices, cables, and connectors.
Caution In European Union countries, use only external speakers, microphones, and headsets that are fully compliant
with the EMC Directive [89/336/EC].
Bluetooth Wireless Headset Performance
Cisco IP Phones support Bluetooth Class 2 technology when the headsets support Bluetooth. Bluetooth enables
low-bandwidth wireless connections within a range of 30 feet (10 meters). The best performance is in the 3-
to 6-foot (1- to 2-meter) range. You can connect up to five headsets, but only the last one connected is used
as the default.
Because of potential interference issues, we recommend that you move 802.11b/g devices, 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
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, 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
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an Ethernet cable into the Ethernet phone port and into the network.
Product Safety and Security