Cisco 7975G Software Guide

Starts at approximately 1/2 brightness, then changes to full brightness when the phone negotiates additional
power.
Note
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
7945G
•
Cisco IOS releases that support bidirectional power negotiation
•
Other power requirements and restrictions
URLDocument Topics
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_installation_
guides_list.html
Cisco Unified IP Phone
Power Injector
http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/index.html
PoE Solutions
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_
support_series_home.html
Cisco Catalyst Switches
http://www.cisco.com/en/US/products/hw/routers/index.html
Integrated Service Routers
http://www.cisco.com/en/US/products/sw/iosswrel/products_ios_cisco_ios_
software_category_home.html
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
Cisco Unified IP Phones and Telephony Networks
Power Outage

Cisco 7975G Specifications

General

Handset type	Wired handset
Product type	IP Phone
Product color	Grey, Silver
Speakerphone	Yes
Voice codecs	G.711Mu, G.711a, G.722, G.729A, iLBC
Number of melodies	24
Aspect ratio	4:3
Display diagonal	5.6 \
Display resolution	320 x 240 pixels
Lines quantity	8 lines
Phonebook capacity	- entries
Number of VoIP accounts	-
Front camera	No
Security algorithms	128-bit AES
Networking standards	IEEE 802.1Q, IEEE 802.1p, IEEE 802.1x, IEEE 802.3af
Ethernet LAN data rates	10, 100, 1000 Mbit/s
Ethernet LAN interface type	Gigabit Ethernet
Supported network protocols	DHCP, TFTP
Volume control	Digital
Headphone outputs	1
Ethernet LAN (RJ-45) ports	2
Number of handles included	1 pc(s)
AC adapter output voltage	48 V
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Certification	FCC

Weight and Dimensions

Depth	152.4 mm
Width	266.7 mm
Height	203.2 mm
Weight	1600 g