Cisco 7931G Administration Guide

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Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
OL-20798-01
Chapter 2 Preparing to Install the Cisco Unified IP Phone on Your Network
Providing Power to the Phone
Power Guidelines
Table 2-1 provides guidelines that apply to external power and to PoE power for the Cisco Unified IP
Phones 7931G.
Obtaining Additional Information about Power
For related information about power, refer to the documents shown in Table 2-2. These documents
provide information about these topics:
• Cisco switches that work with the Cisco Unified IP Phones
• The Cisco IOS releases that support bidirectional power negotiation
• Other requirements and restrictions regarding power
Table 2-1 Guidelines for Powering the Cisco Unified IP Phones 7931G
Power Type Guidelines
External power— Provided
through a Cisco external power
supply.
The CP-PWR-CUBE-3 external power supply may be used with the Cisco Unified IP
Phones 7931G.
External power—Provided
through the Cisco Unified IP
Phone Power Injector.
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 phone.
PoE power—Provided by a switch
through the Ethernet cable
attached to the phone.
• The Cisco Unified IP Phones 7931G supports IEEE 802.3af Power over Ethernet.
• 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.
Table 2-2 Related Documentation for Power
Document
Topics URL
Cisco Unified
IP Phone
Power Injector
http://www.cisco.com/en/US/products/hw/phones/ps379/prod_installation_guides_list.html
PoE Solutions http://www.cisco.com/en/US/netsol/ns340/ns394/ns147/ns412/networking_solutions_package.html
Cisco Catalyst
Switches
http://www.cisco.com/en/US/products/hw/switches/ps708/tsd_products_support_series_home.html
Integrated
Service Routers
http://www.cisco.com/en/US/products/hw/routers/index.html
Cisco IOS
Software
http://www.cisco.com/en/US/products/sw/iosswrel/products_ios_cisco_ios_software_category_home.html

Cisco 7931G Specifications

General

Mounting	Desk/Wall
Handset type	Wired handset
Product type	IP Phone
Product color	Black
Wall mountable	Yes
Electromagnetic compatibility	FCC Part 15 (CFR 47) Class B, ICES-003 Class B, EN55022 Class B, CISPR22 Class B, AS/NZS CISPR 22 Class B, CISPR 24, VCCI Class B, EN55024, EN 50082-1, EN 61000-3-2, EN 61000-3-3, EN 61000-6-1
Wi-Fi	No
Networking standards	IEEE 802.1Q, IEEE 802.1af, IEEE 802.1p
Ethernet LAN interface type	Fast Ethernet
Supported network protocols	DHCP, TFTP, CDP
Lines quantity	24 lines
Phonebook capacity	- entries
Number of VoIP accounts	-
Voice codecs	G.711a, G.729A, G.729B, G.729ab
Volume control	Digital
Display resolution	192 x 64 pixels
Display number of lines	3 lines
Display number of colors	Monochrome
Storage temperature (T-T)	-10 - 60 °C
Operating temperature (T-T)	0 - 40 °C
Operating relative humidity (H-H)	10 - 95 %
Safety	(UL) 60950, (CSA) C22.2 No. 60950, EN 60950, IEC 60950, AS/NZS60950, TS 001
Number of handles included	1 pc(s)

Weight and Dimensions

Depth	229 mm
Width	203 mm
Height	178 mm
Weight	1360 g