Cisco 6941 Administration Guide - Page 23
SCCP. Cisco Unified IP Phones do not support the, Cisco Unified IP Phones use TCP to connect
UPC - 882658277801
View all Cisco 6941 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 23 highlights
Chapter What Networking Protocols are Used? Table 1-4 Supported Networking Protocols on the Cisco Unified IP Phone (continued) Networking Protocol Purpose Usage Notes Link Layer Discovery Protocol-Media Endpoint Devices (LLDP-MED) LLDP-MED is an extension of the LLDP standard developed for voice products. 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/tk652/tk701/tech nologies_white_paper0900aecd804cd46d.shtml Real-Time Transport Protocol (RTP) RTP is a standard protocol for transporting Cisco Unified IP Phones use the RTP protocol to real-time data, such as interactive voice send and receive real-time voice traffic from other and video, over data networks. phones and gateways. Real-Time Control Protocol (RTCP) 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 CM. 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 (defined in RFC 3261) that can be used to establish, maintain, and terminate calls between two or more endpoints. 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. You can configure the Cisco Unified IP Phone to use either SIP or Skinny Client Control Protocol (SCCP). Cisco Unified IP Phones do not support the SIP protocol when the phones are operating in IPv6 address mode. Skinny Client Control Protocol (SCCP) SCCP includes a messaging set that allows communications between call control servers and endpoint clients such as IP Phones. SCCP is proprietary to Cisco Systems. Cisco Unified IP Phone 6921, 6941, 6945, and 6961 use SCCP, version 20 for call control. Secure Real-Time Transfer protocol (SRTP) SRTP is an extension of the Real-Time Protocol (RTP) Audio/Video Profile and ensures the integrity of RTP and Real-Time Control Protocol (RTCP) packets providing authentication, integrity, and encryption of media packets between two endpoints. Cisco Unified IP Phones use SRTP for media encryption. Transmission Control Protocol (TCP) TCP is a connection-oriented transport protocol. Cisco Unified IP Phones use TCP to connect to Cisco Unified CM and to access XML services. Cisco Unified IP Phone 6921, 6941, 6945, and 6961 Administration Guide for Cisco Unified Communications Manager 8.5 (SCCP and SIP) OL-23769-01 1-11