Extron electronics Quantum Ultra Series User Manual page 38

Protocols
The IN SMD 100 supports the following network protocols, depending on the source and
network properties.
Application layer protocols:
HTTP and HTTPS (Hypertext Transfer Protocol and Hypertext Transfer Protocol
•
Secure – RFC 2068) — Used for serving internal web pages to clients and for server
control.
• RTP (Real-time Transport Protocol – RFC 3550) — Adds the ability to obey
embedded timestamps to maintain synchronization among multiple streams.
RTP/AVP (Real-time Protocol/Audio Video Profile – RFC 2250, 2435, 6184) —
•
Describes the payload type being transmitted via RTP.
• RTCP (RTP Control Protocol – RFC 3550) — Required for RTP and useful or
necessary for determining network status, performance, and troubleshooting.
• RTSP (Real-time Streaming Protocol – RFC 2326) — Over TCP and UDP as defined
in RFC 2326, April, 1988.
• SAP (Session Announcement Protocol – RFC 2974) — Allows decoders to discover
and list streams (sessions) available on the local network. Specifically, displays a list of
currently active and compatible multicast streams on the web interface browser page,
allowing a user to select and load, and begin decoding and displaying, any of those
streams without requiring any further information.
• SDP (Session Description Protocol – RFC 4145 and 4566) — Allows RTSP
initialization of the Quantum Ultra IP card using a locally stored SDP file to function as
a browser helper application. In practice, the IP card may use the DESCRIBE method
to initialize RTSP. Also used to encapsulate the data for SAP.
Transport layer protocols:
UDP (User Datagram Protocol) — For multicast and possible control and monitoring
•
feature support
TCP (Transport Control Protocol) — For RTSP and HTTP support
•
Internet layer protocols:
• ICMP (Internet Control Message Protocol) — Required to support ping echo requests
and replies
• IGMP (Internet Group Management Protocol) — Required for IP multicast stream
support
Protocol combinations supported from Extron SME 100 and future Extron
streaming products:
UDP-TS — Single program MPEG-2 transport stream (SPTS) unicast or multicast
•
• Unicast RTP — Native (elementary audio and video streams). Single program
MPEG-2 transport stream (SPTS, RTP-TS)
Multicast RTP over UDP — Native (elementary audio and video streams). Single
•
program MPEG-2 transport stream (SPTS, RTP-TS).
• Unicast RTP over RTSP (RTP and RTSP interleaved over TCP) — Used for
on-demand video where RTP is interleaved with RTSP over a TCP connection to
navigate fire walls that block UDP.
Unicast RTP over RTSP over HTTP (RTP and RTSP interleaved over TCP on
•
port 80) — Used where RTP is interleaved with RTSP over HTTP and is used to
navigate fire walls that allow HTTP (ports 80 or 8080 are open).
Quantum Ultra Series Videowall Processing Systems • Installation and Configuration 30