Cisco 7941G Administration Guide - Page 26

What Networking Protocols are Used? 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 Transport Protocol (RTP) Real-Time Control Protocol (RTCP) 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 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. RTCP works in conjunction with 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 by using Cisco Unified Communications Manager Phone Configuration. For more information, see the "Network Configuration Menu" section on page 4-40. Cisco Unified IP Phone 7961G/7961G-GE and 7941G/7941G-GE for Cisco Unified Communications Manager 6.1 1-8 OL-14620-01