Extron Electronics SME 100 User Guide - Manual (Page 15)

Real-time Transport Protocol (RTP) — An Internet Engineering Task Force (IETF)
standard for streaming real-time multimedia over IP in packets.
Router — A network device that forwards packets from one network to another.
Session Announcement Protocol (SAP) — Used for broadcasting multicast or unicast
session information. The SAP periodically multicasts session description information on
an industry standard multicast address and port. When received by remote clients, these
announcements can be used to facilitate the viewing of streams by eliminating the need for
user configuration.
Session Description Protocol (SDP) — Used to describe multimedia sessions for the
purposes of session announcement, session invitation, and other forms of multimedia
session initiation (as defined in RFC 2327).
Secure Shell (SSH) — A network protocol that creates a secure channel used for secure
communication between two computers on a network. SSH is typically used for data
communication, remote shell (login) services, or command execution.
Secure Sockets Layer (SSL) — A protocol used by web servers and web browsers that
creates a uniquely encrypted channel for private communications over the public Internet.
Simple Instruction Set (SIS) — A set of commands developed by Extron that allows for
RS-232, USB, and TCP / IP control of certain Extron products. A command is sent from
the control device to the product (using a minimal number of characters) and a response is
received from the product and shown on the display of the control device.
Simple Network Management Protocol (SNMP) — An application-layer protocol that
facilitates the exchange of management information between network devices. This protocol
collects (and configures) information from network devices (such as servers, hubs, switches,
and routers) on an Internet Protocol (IP) network.
Streaming Media Player (SMP) web browser plugin — The Extron SMP web browser
plugin (V1.0) is a new SME100 plugin. The plugin provides the best streaming features,
including a full screen option and closed captioning.
Streaming media (stream) — Multimedia that is constantly received by (and normally
presented to) an end-user while being delivered by a streaming provider. Internet television is
a commonly streamed medium.
Switch — A device that cross-connects network devices.
Time To Live (TTL) — A value that specifies the number of router hops multicast traffic will
make between routed domains when it exits a source.
Transmission Control Protocol (TCP) — A protocol developed for the Internet that
provides reliable end-to-end data delivery from one network device to another.
Transmission Control Protocol/Internet Protocol (TCP/IP) — The communication
protocol of the Internet. Computers and devices with direct access to the Internet are
provided with a copy of the TCP/IP program to allow them to send and receive information
in an understandable form.
Transport Streams (TS) — A form of media wrapped in MPEG-2 transport stream
headers. The MPEG-2 transport headers contain information about the media and also
contain the H.264 and AAC elementary streams embedded in the transport stream packets.
• TS/UDP — (Unicast and multicast) An MPEG-2 transport stream containing the
elementary streams for the audio and video. It is sent using UDP packets.
• TS/RTP — (Unicast and multicast) – Transport stream that is sent using RTP/UDP.
RTP provides sequencing information; if the sequencing information is reordered by
the network, RTP reorganizes and processes the information in the correct order. UDP
would process the sequencing information out of order, making RTP performance better
on larger, many hop networks.
• ES/RTP (Native RTP) — (Unicast and multicast) Similar to RTSP; sends an RTP
stream for video and an RTP stream for audio.
SME 100 • Introduction 9