Power Outage; Additional Information About Power; Phone Configuration Files - Cisco 7975G Software Manual

Power Outage

Starts at approximately 1/2 brightness, then changes to full brightness when the phone negotiates additional
Note
power.
When a phone is powered with a method that does not support full brightness for the phone screen, the phone
Brightness control (Settings > User Preferences > Brightness) does not allow you to set the brightness to
the maximum value.
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 dialing 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 dialing.

Additional Information About Power

The documents in the following table provide more information on the following topics:
• Cisco switches that work with the Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and
• Cisco IOS releases that support bidirectional power negotiation
• Other power requirements and restrictions
Document Topics
Cisco Unified IP Phone
Power Injector
PoE Solutions
Cisco Catalyst Switches
Integrated Service Routers
Cisco IOS Software

Phone Configuration Files

Phone configuration files are stored on the TFTP server and define Cisco Unified Communications Manager
connection parameters. In general, whenever you make a change in Cisco Unified Communications Manager
that requires the phone to reset, a change is made automatically to the phone configuration file.
Cisco Unified IP Phone 7975G, 7971G-GE, 7970G, 7965G, and 7945G Administration Guide for Cisco Unified
Communications Manager 9.0 (SCCP and SIP)
34
7945G
URL
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_installation_
guides_list.html
http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/index.html
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_
support_series_home.html
http://www.cisco.com/en/US/products/hw/routers/index.html
http://www.cisco.com/en/US/products/sw/iosswrel/products_ios_cisco_ios_
software_category_home.html
Cisco Unified IP Phones and Telephony Networks