Oracle Acme Packet 4500, Руководство по установке и обслуживанию оборудования

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102 Acme Packet 4500 Hardware Installation and Maintenance Guide
GLOSSARY
IP — Internet Protocol is the method by which data is sent from one computer to
another on the Internet.
LED — light emitting diode is an electronic device that lights up when electricity is
passed through it.
LAN — local area network is a group of computers and associated devices that share
a common communications line within a small geographic area.
LOS — loss of signal occurs when the signal level falls below an acceptable level.
LOS is a physical layer error and typically results in an alarm.
NEBS — Network Equipment Building Standards defines a rigid and extensive set
of performance, quality, environmental, and safety requirements developed by
Bellcore.
NIC — network interface card is an expansion board you insert into a computer so
the computer can be connected to a network.
NIU — the network interface unit provides network connectivity for management,
signaling, and media traffic to and from the Acme Packet 3820.
NVRAM — non-volatile random access memory is a type of memory that retains its
contents when power is turned off.
Optical Transceiver — the fiber connection to the Acme Packet 3820 plugs into an
optical transceiver. Through this connection, light energy is converted into electrical
energy.
PCMCIA — Personal Computer Memory Card International Association is an
organization consisting of approximately 500 companies that has developed a
standard for small, credit-card sized devices (PC cards). This standard is designed for
attaching input/output devices such as network adaptors, Fax/modems, or hard
drives to notebook computers.
Physical Interface Card — the physical interface card is synonymous with the
network interface cards on the Acme Packet 3820.
PROM — programmable read-only memory is a memory chip on which data can
only be written once. A PROM is non-volatile; it is a memory chip on which data can
be written only once.
QoS — quality of service is a networking term that refers to the capability of a
network to provide better service to selected network traffic over various
technologies.
RAM — random access memory is a type of computer memory that can be accessed
randomly. RAM is the same as main memory.
RS-232 — Recommended Standard 232 is a standard interface approved by the
Electronic Industries Association for connecting serial devices.
RJ45 — registered jack 45 is an eight-wire connector commonly used to connect
computers onto a LAN.
SNMP — simple network management protocol is a set of protocols used for
managing complex networks and network devices.
SDRAM — synchronous dynamic random access memory is a type of DRAM that
can run at much higher clock speeds than conventional memory.
Telnet — Telnet is a standard terminal emulation program that allows remote login
and connection to systems/servers on a network. Telnet uses a single TCP/IP