Cisco 7970G - IP Phone VoIP Administration Manual page 25

Chapter 1 An Overview of the Cisco Unified IP Phone
Table 1-1 Supported Networking Protocols on the Cisco Unified IP Phone (continued)
Networking Protocol
Link Layer Discovery
Protocol-Media
Endpoint Devices
(LLDP-MED)
Real-Time Control
Protocol (RTCP)
Real-Time Transport
Protocol (RTP)
Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1
OL-14626-01
Purpose
LLDP-MED is an extension of the
LLDP standard developed for voice
products.
RTCP works with Real-Time
Transport Protocol (RTP) to provide
QoS data (such as jitter, latency, and
round trip delay) on RTP streams.
RTP is a standard protocol for
transporting real-time data, such as
interactive voice and video, over data
networks.
What Networking Protocols Are Used?
Usage Notes
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/tk
652/tk701/technologies_white_pape
r0900aecd804cd46d.shtml
RTCP is disabled by default, but you
can enable it on a per-phone basis
using Cisco Unified
Communications Manager. For more
information, see the "Network
Configuration" section on page
Cisco Unified IP Phones use the RTP
protocol to send and receive
real-time voice traffic from other
phones and gateways.
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