Oracle Acme Packet 4500 Hardware Installation Manual page 110

GLOSSARY
112 Acme Packet 4500 Hardware Installation Guide
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 NIU provides network connectivity for management, signaling, and
media traffic to and from the Acme Packet 4500.
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 4500 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 4500.
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
Version 1.0