Fujitsu IP-900D, Руководство пользователя по оборудованию

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Glossary and Index
IP-900E/IP-900D/IP-900IID
96
IP Multicast
Technology for transmitting identical data to
multiple remote destinations simultaneously us-
ing TCP/IP. An address system called class D
is used for multicasting. In the class D address
system, the first four bits (1110) indicate a multi-
cast, and the remaining 28 bits specify a
multicast group. Path control methods for IP
multicasting are PIM and DVMRP, but no one
method has become the standard yet.
LAN (Local Area Network)
Data communication system in a specific area
(maximum of 6 miles or about 10 km). It
provides moderate to high data transfer speeds.
LCD (Liquid Crystal Display)
The display device using the liquid crystal. A
LCD is a thin, flat display device made up of any
number of color or monochrome pixels arrayed
in front of a light source or reflector. There are
two categories, the simple matrix like STN and
DSTN and the active matrix like TFT.
LED (Light-Emitting Diode)
The IP-900E/IP-900D/IP-900IID has a power
LED lamp and alarm LED lamps. The power
LED lamp is lit in green to indicate this
equipment is on. An alarm LED lamp is lit in
red to indicate that an alarm has been
generated.
MPEG-4
Standard for the compression and coding
of color video for storage purposes, and the
name of the organization promoting this
standardization is used in the name of the
standard. MPEG-4 handles not only regular
image and voice data but also a comprehensive
range of multimedia data, including computer
graphics and text. It defines a flexible
framework for a scalable object encoding system
depending on technological developments. It
has a transfer speed ranging from several tens
of Kbps to several tens of Mbps (low bit rate
to wide range). It is intended for low-speed
communication by general-purpose multimedia
encoding systems on mobile terminals.
PING
A command supported by operating systems
such as UNIX and Windows that are used in a
TCP/IP network to determine whether IP packets
can reach or have reached a communication
destination.
PPPoE (Point to Point Protocol over Ethernet)
This is the user authentication standard for the
connection like PPP connection on the Ethernet
network.
PS
MPEG-2 method of multiplexing audio, video,
and data. It is an abbreviation of Program
Stream, and it is used for transmission and
storage in an error-free environment.
RS-232C
Interface standard that was mainly established by
the Electronics Industry Association (EIA) for
communication between data terminals and data
communications equipment
SD-SDI (Standard Definition television – Serial
Digital Interface)
Standard definition digital video interface
standardized in SMPTE259M.
SG (Signal Ground)
Ground for signals
Subnet Mask
Mask value used for obtaining a subnet network
address from an IP address. The subnet
address is obtained by using an AND operation
between an IP address and subnet mask.
TCP (Transmission Control Protocol)
Abbreviation of Transmission Control Protocol,
the protocol required for direct connection to the
Internet. In the OSI reference model, TCP
corresponds to the transport layer and IP
corresponds to the network layer. TCP has been a
global standard protocol that is supported by major
operating systems, including UNIX, OS/2, and
Windows.
TS (Transport Stream)
The stream used in the multi-programs
multiplexing, standardized in MPEG-2 systems.
The transport stream offers features for error
correction for transportation over unreliable media,
and is used in broadcast applications and ATM
telecommunication.
TTL (Time To Live)
Abbreviation of time to live, which indicates the
survival time of a packet in a network. If a packet
sent to a network happens to enter a loop because
of a setting error on a router, it will not survive
forever but will be discarded when the time
specified in the Time To Live field of the IP header
is reached.