Cisco UC Phone 9971

IP videophone Cisco Unified IP Phone 9971 is a leading multifunctional and multimedia user device, ensuring high quality of voice transfer, video and support to various applications. The device has a built in switch with two Ethernet 10/100/100M/bit ports for connection to LAN and PC, additionally it has a built in 802.11 a/b/g/ module, which ensures additional types of connection. Cisco 9971 supports the most used voice and video codec, thus, providing the high quality of communication. It has a touch sensitive high resolution display, good design and convenient user interface, simplifying the interactions with this phone.

The phone has wide range of accessories, including wireless headsets, Cisco Unified Video Camera, allowing increasing the effectiveness of IP videophone Cisco 9971. Videophone Cisco 9971 supports XML and Java MIDIet-based applications. This device is compatible with the latest version of Cisco Unified Communications Manager.

Technical characteristics of IP phone 9971:

Headset radius up to 8m 2 USB for Cisco Unified Video Camera or wireless headset LLDP-PoE, CDP , IEEE Power over Ethernet 802.3af and 802.3at Local power supply with help of CP-PWR-CUBE-4 or CP-PWR-INJ power injector 5inch color display HD sound 2 x RJ-45 10/100/1000 BASE-T Ethernet 802.11a/b/g Wi-Fi 1 x RJ – 9 Support up to 6 phone lines Cisco Discovery Protocol IEEE 802.1 p/q H.264/AVC Support: G.711a, G.711, G.729a, G.729b и G.729ab, iLBC and iSAC audio codecs

Providers in database: 6433

SDP Protocols Are Used To Transmit Media Session Information

In 1998, the Internet Engineering Task Force (IETF) published the specification for a Session Description Protocol or SDP as a format that describes parameters for streaming media. The original IETF Proposed Standard was updated in 2006 as RFC 4566. Although the SDP was created as a feature of Session Announcement Protocol (SAP), it can be used with Real-time Transport Protocol, Real-time Streaming Protocol (RTSP), and Session Initiation Protocol, as well as a standalone protocol. Parameter negotiation, session announcement and session invitation are included in the descriptive sessions from the SDP protocol. Rather than transmit data like other types of protocols, an SDP negotiates between media type endpoints, format and properties involved. A session begins when a connection is established, and the session is terminated only after every endpoint is no longer participating.

View more WIKI