Power Guidelines; Power Outage - Cisco CP-7942G Software Manual

Providing Power to the Cisco Unified IP Phone

Power Guidelines

Table 2-1
Table 2-1 Guidelines for Powering the Cisco Unified IP Phone 7962G and 7942G
Power Type
External power—Provided
through the CP-PWR-CUBE-3
external power supply.
External power—Provided
through the Cisco Unified IP
Phone Power Injector.
PoE power—Provided by a
switch through the Ethernet
cable attached to the phone.
External power—Provided
through inline power patch
panel WS-PWR-PANEL

Power Outage

Your accessibility to emergency service through the phone is dependent on the phone being powered. If
there is an interruption in the power supply, Service and Emergency Calling Service dialing will not
function until power is restored. In the case of a power failure or disruption, you may need to reset or
reconfigure equipment before using the Service or Emergency Calling Service dialing.
Cisco Unified IP Phone 7962G and 7942G Administration Guide for Cisco Unified Communications Manager 7.0
2-4
provides guidelines for powering the Cisco Unified IP Phone 7962G and 7942G.
Guidelines
• The Cisco Unified IP Phone 7962G and 7942G use the CP-PWR-CUBE-3 power
supply.
The Cisco Unified IP Phone Power Injector may be used with any Cisco Unified IP Phone.
Functioning as a midspan device, the injector delivers inline power to the attached phone.
The Cisco Unified IP Phone Power Injector is connected between a switch port and the IP
Phone, and supports a maximum cable length of 100m between the unpowered switch and
the IP Phone.
The Cisco Unified IP Phone 7962G and 7942G support Cisco inline PoE.
•
The Cisco Unified IP Phone 7962G and 7942G support IEEE 802.3af Class 2 power
•
on signal pairs and spare pairs.
To ensure uninterruptible operation of the 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 phone deployment. Refer to the documentation for your switch for operating
system version information.
The inline power patch panel WS-PWR-PANEL is compatible with the Cisco Unified
IP Phone 7962G and 7942G.
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
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