Cisco 7931G Manual

Network Protocols
Cisco Unified IP Phones support several industry-standard and Cisco network protocols required for voice
communication. Table 1: Supported Network Protocols on the Cisco Unified IP Phone, on page 8 provides
an overview of the network protocols that the Cisco Unified IP Phone 7931G supports.
Table 1: Supported Network Protocols on the Cisco Unified IP Phone
Usage notesPurposeNetworking Protocol
If you use BootP to assign IP addresses
to the Cisco Unified IP Phone, the
BOOTP Server option shows “Yes”
in the network configuration settings on
the phone.
BootP enables a network device such
as the Cisco Unified IP Phone to
discover certain startup information,
such as its IP address.
Bootstrap Protocol
(BootP)
The Cisco Unified IP Phone uses CDP
to communicate information such as
auxiliary VLAN ID, per port power
management details, and Quality of
Service (QoS) configuration information
with the Cisco Catalyst switch.
CDP is a device-discovery protocol that
runs on all Cisco-manufactured
equipment.
Using CDP, a device advertises its
existence to other devices and receives
information about other devices in the
network.
Cisco Discovery Protocol
(CDP)
CPPDP is used by the Peer Firmware
Sharing feature.
CPPDP is a Cisco proprietary protocol
that is used to form a peer-to-peer
hierarchy of devices. CPPDP also is
used to copy firmware or other files
from peer devices to neighboring
devices.
Cisco Peer-to-Peer
Distribution Protocol
(CPPDP)
DHCP is enabled by default. If disabled,
you must manually configure the IP
address, subnet mask, gateway, and a
TFTP server on each phone locally.
We recommend that you use DHCP
custom option 150. With this method,
you configure the TFTP server IP
address as the option value. For
additional supported DHCP
configurations, see the
Cisco Unified Communications Manager
System Guide, “Dynamic Host
Configuration Protocol” and
“Cisco TFTP” chapters.
DHCP dynamically allocates and
assigns an IP address to network
devices.
DHCP enables you to connect an IP
phone into the network and have the
phone become operational without your
needing to manually assign an IP
address or to configure additional
network parameters.
Dynamic Host
Configuration Protocol
(DHCP)
Cisco Unified IP Phone 7931G Administration Guide for Cisco Unified Communications Manager 9.0 (SCCP
and SIP)
8
Cisco Unified IP Phone 7931G
Network Protocols

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