Cisco 7931G Administration Guide

CHAPTER
2-1
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
OL-20798-01
2
Preparing to Install the Cisco Unified IP Phone on
Your Network
Cisco Unified IP Phones enable you to communicate using voice over a data network. To provide this
capability, the phones depend upon and interact with several other key Cisco IP Telephony and network
components, including Cisco Unified Communications Manager, Domain Name System (DNS) and
DHCP servers, TFTP servers, media resources, and Cisco prestandard PoE.
This chapter focuses on the interactions between the Cisco Unified IP Phone 7931G and Cisco Unified
Communications Manager, DNS and DHCP servers, TFTP servers, and switches. It also describes
options for powering phones.
For related information about voice and IP communications, refer to this URL (you must be a registered
Cisco.com user):
http://www.cisco.com/en/US/products/sw/voicesw/index.html
This chapter includes these topics:
• Understanding Interactions with Other Cisco Unified IP Communications Products, page 2-1
• Providing Power to the Phone, page 2-3
• Understanding Phone Configuration Files, page 2-5
• Understanding the Phone Startup Process, page 2-6
• Adding Phones to Cisco Unified Communications Manager, page 2-7
• Using Cisco Unified IP Phones with Different Protocols, page 2-11
• Determining the MAC Address of a Cisco Unified IP Phone, page 2-12
Understanding Interactions with Other Cisco
Unified
IP Communications Products
To function in the IP telephony network, the Cisco Unified IP Phone must be connected to a networking
device, such as a Cisco Catalyst switch. You must also register the Cisco Unified IP Phone with a
Cisco Unified Communications Manager system before sending and receiving calls.
This section includes these topics:
• Understanding How the Cisco Unified IP Phone Interacts with Cisco Unified Communications
Manager, page 2-2
• Understanding How the Cisco Unified IP Phone Interacts with the VLAN, page 2-2

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