Cisco 7912G - Manual (Page 35)

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Cisco Unified IP Phone Administration Guide for Cisco Unified CallManager 5.0 (SIP), Cisco Unified IP Phones
OL-8131-01
Chapter 1 An Overview of the Cisco Unified IP Phone
What Features are Supported on the Cisco Unified IP Phone 7905G and 7912G?
Related Topics
• Understanding the Phone Startup Process, page 2-4
• Understanding Interactions with Other Cisco Unified Communications
Products, page 2-2
• Network Configuration Menu Parameter Descriptions, page 4-10
What Features are Supported on the Cisco Unified IP
Phone 7905G and 7912G?
The Cisco Unified IP Phone 7905G and 7912G function much like traditional
analog phones, allowing you to place and receive telephone calls. In addition to
traditional telephony features, the Cisco Unified IP Phones include features that
enable you to administer and monitor the phone as a network device.
This section includes the following topics:
• Feature Overview, page 1-8
• Configuring Telephony Features, page 1-8
Session Initiation
Protocol (SIP) SIP is the Internet Engineering task
Force (IETF) standard for
multimedia conferencing over IP. SIP
is an ASCII-based, application-layer
control protocol that can be used to
establish, maintain, and terminate
calls between two or more endpoints. The
Cisco Unified IP Phone 7905G/7912
G support UDP-based SIP signalling.
Like other VoIP protocols, SIP is
designed to address the functions of
signaling and session management
within a packet telephony network.
Signaling allows call information to
be carried across network
boundaries. Session management
provides the ability to control the
attributes of an end-to-end call.
User Datagram Protocol
(UDP) UDP is a connectionless messaging
protocol for delivery of data packets. Cisco Unified IP Phones receive and
process UDP messages.
Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol Purpose Usage Notes