Glossary

SDP (Session Description Protocol -RFC 4566) is the protocol used to describe multimedia session announcement, multimedia session invitation, and other forms of multimedia session initiation. A multimedia session is defined, for
these purposes, as a set of media streams that exist for a duration of time.

SDP packets usually include the following information:

SESSION INFORMATION

• Session name and purpose
• Time(s) the session is active

Since the resources necessary for participating in a session may be limited, it is useful to include the following additional information:

• Information about the bandwidth to be used by the session
• Contact information for the person responsible for the session

MEDIA INFORMATION

• Type of media, such as video and audio
• Transport protocol, such as RTP/UDP/IP and H.320
• Media format, such as H.261 video and MPEG video
• Multicast address and Transport Port for media (IP multicast
  session)
• Remote address for media and Transport port for contact
  address (IP unicast session)

SDP is packaged by RADVISION's products as part of the SIP stack, MEGACO stack, MGCP stack and Multimedia Terminal Framework.