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.
Static IP address
—
An IP address specifically assigned to a device or system in a
network configuration. This type of address requires manual configuration of the network
device or system and can only be changed manually or by enabling
DHCP
(see page 208).
Stop bits
—
The bit or bits transmitted that signal the end of a character. Typically set to 1.
Streaming Media Player (SMP) Web browser plugin
—
The Extron SMP Web browser
plugin (V1.0) provides the best streaming features to display from Extron streaming media
devices.
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 network switch enables communication between devices in a network by
routing data between ports at the data link layer (layer 2 of the OSI model). A managed
switch can be configured to transmit data only to the specific device for which the data was
meant.
Telnet port
—
Most controllers support Telnet and use port 23 as the communication port
to receive or issue commands.
Time To Live (TTL)
—
A value that specifies the number of router hops multicast traffic can
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 packet 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.
The SMP 351 is compatible with transport streams that contain H.264 encoded video and
AAC encoded audio. Transport streams containing MPEG-2 video and AC3 audio are not
supported.
•
TS/UDP
— (Unicast or multicast) An MPEG-2 transport stream containing the
elementary streams for the audio and video. It is sent using UDP packets.
•
TS/RTP
— (Unicast or 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.
SMP 351 • Reference Information
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