What Networking Protocols Are Used? - Cisco 6921 - Unified IP Phone Standard VoIP Administration Manual

Chapter 1 An Overview of the Cisco Unified IP Phone
15 Applications Opens/closes the Applications menu. Use it to access call history, user
button preferences, phone settings, administration settings, and phone information.
16 Contacts button
Opens/closes the Directories menu. Use it to access personal and corporate
directories.
17 HandSet
Phone handset.

What Networking Protocols are Used?

Cisco Unified IP Phones support several industry-standard and Cisco networking protocols required for
voice communication.
Cisco Unified IP Phone 6921, 6941, and 6961 support.
Table 1-4 Supported Networking Protocols on the Cisco Unified IP Phone
Networking Protocol
Bootstrap Protocol
(BootP)
Cisco Discovery Protocol
(CDP)
Dynamic Host
Configuration Protocol
(DHCP)
Hypertext Transfer
Protocol (HTTP)
Cisco Unified IP Phone 6921, 6941, and 6961 Administration Guide for Cisco Unified Communications Manager 7.1 (SCCP)
OL-19025-01
Table 1-4
Purpose
BootP enables a network device such as
the Cisco Unified IP Phone to discover
certain startup information, such as its IP
address.
CDP is a device-discovery protocol that
runs on all Cisco-manufactured
equipment.
Using CDP, a device can advertise its
existence to other devices and receive
information about other devices in the
network.
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.
HTTP is the standard way of transferring
information and moving documents across
the Internet and the web.
provides an overview of the networking protocols that the
Usage Notes
—
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.
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.
Cisco recommends 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, go to
the Dynamic Host Configuration Protocol
and the Cisco TFTP
Communications Manager System Guide.
Note If you cannot use option 150, you may try
using DHCP option 66.
Cisco Unified IP Phones use HTTP for the XML
services and for troubleshooting purposes.
What Networking Protocols are Used?
chapter
chapter in the Cisco Unified
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