Cisco 7970G Administration Guide - Page 25
Cisco Unified IP Phones use the RTP, The Cisco Unified IP Phone supports
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Chapter 1 An Overview of the Cisco Unified IP Phone What Networking Protocols Are Used? 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) Purpose Usage Notes LLDP-MED is an extension of the The Cisco Unified IP Phone supports LLDP standard developed for voice LLDP-MED on the SW port to products. 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 works with Real-Time Transport Protocol (RTP) to provide QoS data (such as jitter, latency, and round trip delay) on RTP streams. 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 4-41. RTP is a standard protocol for transporting real-time data, such as interactive voice and video, over data networks. Cisco Unified IP Phones use the RTP protocol to send and receive real-time voice traffic from other phones and gateways. Cisco Unified IP Phone 7970G/7971G-GE Administration Guide for Cisco Unified Communications Manager 6.1 OL-14626-01 1-7