Paradyne ACCULINK 3150, Руководство оператора, Страница: 223 / 234

Glossary
3150-A2-GB24-10 March 2001
GL-5
frame relay A high-speed connection-oriented packet switching WAN protocol using variable-length
frames.
framing A technique that separates bits into identifiable groups.
Generic-Interface
Extension MIB An extension to MIB II that defines additional objects for control of generic interfaces in
MIB II.
Get (SNMP)
A command providing read-only access to SNMP MIB objects.
ground
A physical connection to earth or other reference point.
HDLC High-Level Data Link Control. A communications protocol defined by the International
Standards Organization (ISO).
host
A computer attached to a network that shares its information and devices with the rest of the
network.
Hz Hertz. A unit of frequency that equals one cycle per second.
ICMP Internet Control Management Protocol. Internet protocol that allows for the generation of
error messages, tests packets, and information messages related to IP.
ID branch
Identity branch of the CSU menu tree.
interface A shared boundary between functional units.
Internet The worldwide internetwork, which predominantly uses the TCP/IP protocol.
internetwork
An interconnected collection of networks (also called an internet).
IP address
Internet Protocol address. The address assigned to an internet host.
ISO International Standards Organization.
ITU International Telecommunications Union. The telecommunications agency of the United
Nations, established to provide standardized communications procedures and practices.
Before March 1993 it was called CCITT.
kbps
Kilobits per second. One kilobit is usually taken to be 1,024 bits.
LAN Local Area Network. A privately owned and administered data communications network
limited to a small geographic area.
LBO Line Build-Out. The amount of attenuation of the transmitted signal that is used to
compensate for the length of wire between the transmitter and the receiver.
LCD Liquid Crystal Display. Thin glass plates containing liquid crystal material. When voltage is
applied, the amount of light able to pass through the glass plates is altered so that
messages can be displayed.
LCP Link Control Protocol.
LED
Light Emitting Diode. A light or status indicator that glows in response to the presence of a
certain condition (e.g., an alarm).
link The physical connection between one location and another used for data transmission.
link layer protocol The protocol that regulates the communication between two network nodes.
link trap A trap that identifies the condition of the communications interface (linkDown or linkUp
traps).
LLB Line LoopBack. A test in which the received signal on the network interface is looped back
to the network without change.