Cisco 8831NR Administration Manual page 46

Power Outage
Power Type
External power: Provided through the Cisco Unified
IP Phone Power Injector.
External power: Provided through inline power patch
panel WS-PWR-PANEL.
PoE power: Provided by a switch through the Ethernet
cable attached to the conference phone.
Power Outage
Your access to emergency service through the phone requires the phone to receive power. If an interruption
in the power supply occurs, Service and Emergency Calling Service dialling do not function until power is
restored. In the case of a power failure or disruption, you may need to reset or reconfigure equipment before
you can use the Service or Emergency Calling Service dialling.
Power Reduction
You can reduce the amount of energy that the phone consumes by using Power Save or EnergyWise (Power
Save Plus) mode.
Power Save Mode
In Power Save mode, the backlight on the screen is not lit when the phone is not in use. The phone remains
in Power Save mode for the scheduled duration or until the user interacts with the device. In the Device
Configuration window on Cisco Unified Communications Administration, configure the following parameters:
Cisco Unified IP Conference Phone 8831 and 8831NR Administration Guide
36
Cisco Unified IP Phones and Telephony Networks
Guidelines
The Cisco Unified IP Phone Power Injector may be
used with any Cisco Unified IP Phone or Conference
Phone. It functions as a mid-span device to deliver
inline power to the attached phone. The Cisco Unified
IP Phone Power Injector is connected between a
switch port and the IP Conference Phone and supports
a maximum cable length of 100m between the
unpowered switch and the IP Phone.
The inline power patch panel WS-PWR-PANEL is
compatible with the Cisco Unified IP Conference
Phone.
• The Cisco Unified IP Conference Phone supports
IEEE 802.3af Class 3 power on signal pairs and
spare pairs.
• When using a sound base in Linked Mode, the
primary sound base must be connected using the
CP-PWR-CUBE-3 external power supply.
• To ensure uninterruptible operation of the
conference phone, make sure that the switch has
a backup power supply.
• Make sure that the CatOS or IOS version running
on your switch supports your intended
conference phone deployment. Refer to the
documentation for your switch for operating
system version information.