Lucent Technologies SLC ConnectReach User & Service Manual page 525

Glossary 363-208-050
IR — Intelligent Repeater.
ISDN — Integrated Services Digital Network. A switched digital network from the local or long-distance
exchange carrier to the subscriber. There are two types of service: Basic Rate Interface (BRI) and Primary
ISP — Internet Service Provider. A company that provides access to the Internet. For a monthly fee, the
service provider gives you a software package, username, password and access phone number. Equipped
with a modem, you can then log on to the Internet and browse the World Wide Web and send and receive
e-mail.
L
LAN — Local Area Network. A short distance data communications network (typically within a building or
campus) used to link computers and peripheral devices [such as printers, compact disc-read only
memories (CD-ROMs), modems] under some form of standard control.
LCR — Local Call Routing. (Also known as Least Cost Routing.) A telephone system feature that
automatically selects the most economical route available for an outgoing call.
LCV — Line Code Violation. Occurrence of either a Bipolar Violation (BPV) or Excessive Zeroes (EXZ)
error event.15]).
LES — Line Errored Second. Second when one or more line code violations (LCVs) have occurred.
LMI — Local Management Interface. A specification for the use of frame-relay products that defines a
method of exchanging status information between devices such as routers.
Local Loop — The voice-band channel connecting the subscriber to the CO. Sometimes called subscriber
loop.
LOFC — Loss of Frame. Used in T1 line statistics.
Loop-down — Disarm loopback.
Loop-up — Arm loopback.
Loop-Start — See Ground-Start.
LOS — Loss of Signal (T1).
LSB — Least Significant Bit/Byte.
GL-7
Issue 4 June 2002