Cisco 7931G Administration Guide

1-6
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 8.0 (SCCP and SIP)
OL-20798-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Networking Protocols Are Used?
IEEE 802.1X The IEEE 802.1X standard defines a
client-server-based access control and
authentication protocol that restricts
unauthorized clients from connecting to a LAN
through publicly accessible ports.
Until the client is authenticated, 802.1X access
control allows only Extensible Authentication
Protocol over LAN (EAPOL) traffic through the
port to which the client is connected. After
authentication is successful, normal traffic can
pass through the port.
The Cisco Unified IP Phone implements the
IEEE 802.1X standard by providing support
for these authentication methods:
EAP-FAST, EAP-TLS, and EAP-MD5.
When 802.1X authentication is enabled on
the phone, you should disable the PC port
and voice VLAN. For additional
information, see Supporting 802.1X
Authentication on Cisco Unified IP Phones,
page 1-18.
Internet Protocol (IP) IP is a messaging protocol that addresses and
sends packets across the network.
To communicate using IP, network devices
must have an assigned IP address, subnet,
and gateway.
IP addresses, subnets, and gateways
identifications are assigned automatically if
you are using the phone with DHCP. If you
are not using DHCP, you must assign these
properties manually to each local phone.
The Cisco Unified IP Phone supports
concurrent IPv4 and IPv6 addresses.
Configure the IP addressing mode (IPv4
only, IPv6 only, and both IPv4 and IPv6)
in Cisco Unified CM Administration.
For more information, see the Cisco Unified
Communications Manager Features and
Services Guide, Internet Protocol Version 6
(IPv6).
Link Layer Discovery
Protocol (LLDP)
LLDP is a standardized network discovery
protocol (similar to CDP) that is supported on
some Cisco and third-party devices.
The Cisco Unified IP Phone supports LLDP
on the PC port.
Link Layer Discovery
Protocol-Media Endpoint
Devices (LLDP-MED)
LLDP-MED is an extension of the LLDP
standard developed for voice products.
The Cisco Unified IP Phone supports
LLDP-MED on the SW port to
communicate information such as:
• Voice VLAN configuration
• Device discovery
• Power management
• Inventory management
For more information about LLDP-MED
support, see the LLDP-MED and Cisco
Discovery Protocol white paper:
http://www.cisco.com/en/US/tech/tk652/tk
701/technologies_white_paper0900aecd80
4cd46d.shtml
Table 1-2 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol Purpose Usage Notes

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