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Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.6 (SCCP and SIP)
OL-24567-01
Chapter
What Networking Protocols are Used?
What Networking Protocols are Used?
Cisco Unified IP Phones support several industry-standard and Cisco networking protocols required for
voice communication. Table 1-4 provides an overview of the networking protocols that the
Cisco Unified IP Phone 6921, 6941, 6945, and 6961 support.
16 Contacts button Opens/closes the Directories menu. Use it to access personal and corporate
directories.
17 HandSet Phone handset.
Table 1-3 Features on the Cisco Unified IP Phone 6961
Table 1-4 Supported Networking Protocols on the Cisco Unified IP Phone
Networking Protocol Purpose Usage Notes
Bootstrap Protocol
(BootP)
BootP enables a network device such as
the Cisco Unified IP Phone to discover
certain startup information, such as its IP
address.
—
Cisco Audio Session
Tunneling (CAST)
The CAST protocol allows IP phones and
associated applications behind the phone
to discover and communicate with the
remote endpoints without requiring
changes to the traditional signaling
components like Cisco Unified
Communications Manager (Cisco Unified
CM) and gateways. The Cast protocol
allows separate hardware devices to
synchronize related media and it allows
PC applications to augment non Video
capable phones to become video enabled
by using the PC as the video resource.
—
Cisco Discovery Protocol
(CDP)
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.
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.
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