RADVision VIU-323, User Manual

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Glossary-5
prefix
A dialing code you dial before the dialing stream that forces the VIU-323 to send data at a
specific bandwidth, overriding the default outgoing bandwidth.
protocol
A set of rules for data communications to ensure the accurate transmission of data. Devices
can only communicate with one another if they follow the same protocol.
QCIF
Quarter Common Intermediate Format; a low resolution video format that provides 144
lines times 176 pixels at up to 30 frames per second.
RJ-45
Registered Jack-45. Standard 8-wire connectors for IEEE 802.3 10BASE-T networks.
restricted
Refers to bandwidth used in an H.320 network connection; each channel uses only 56 Kbps
of a total of 64 Kbps because of network or endpoint limitations.
room system
H.320-based legacy videoconferencing stations. They are called room systems because they
are usually large monitors with a wide-angle camera and served groups of people who meet
in a room and conference with other similar groups at remote locations.
RS-366
Recommended Standard 366. EIA specification for the interface between DTE and DCE.
SCN
Switched-circuit network.
socket
Unique transport address for an application or device formed by the IP address and port
number.
subnet
A portion of an IP network defined by a subnet mask. Devices on the same subnet have the
same subnet mask.
subnet mask
A mask that is applied to an IP address in order to separate the network segment of the IP
address from the host (machine) segment of the address. For example, if you apply the
subnet mask 255.255.255.0 to the network address 240.200.60.103, the network segment is
240.200.60.0 and the host segment is 103.