Lucent Technologies Release 6 Benutzerhandbuch
DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Glossary and Abbreviations
Page GL-30
lightwave transceiver
Hardware that provides an interface to fiber-optic cable from port circuit packs and DS1 converter
circuit packs. Lightwave transceivers convert electrical signals to light signals and vice versa.
circuit packs. Lightwave transceivers convert electrical signals to light signals and vice versa.
line
A transmission path between a communications system or CO switching system and a voice
terminal or other terminal.
terminal or other terminal.
line appearance
See
line buildout
A selectable output attenuation is generally required of DTE equipment because T1 circuits
require the last span to lose 15–22.5 dB.
require the last span to lose 15–22.5 dB.
line port
Hardware that provides the access point to a communications system for each circuit associated
with a telephone or data terminal.
with a telephone or data terminal.
link
A transmitter-receiver channel that connects two systems.
link-access procedure on the D-channel (LAPD)
A link-layer protocol on the ISDN-BRI and ISDN-PRI data-link layer (level 2). LAPD provides data
transfer between two devices, and error and flow control on multiple logical links. LAPD is used for
signaling and low-speed packet data (X.25 and mode 3) on the signaling (D-) channel and for
mode-3 data communications on a bearer (B-) channel.
transfer between two devices, and error and flow control on multiple logical links. LAPD is used for
signaling and low-speed packet data (X.25 and mode 3) on the signaling (D-) channel and for
mode-3 data communications on a bearer (B-) channel.
LINL
Local indirect neighbor link
local area network (LAN)
A networking arrangement designed for a limited geographical area. Generally, a LAN is limited in
range to a maximum of 6.2 miles and provides high-speed carrier service with low error rates.
Common configurations include daisy chain, star (including circuit-switched), ring, and bus.
range to a maximum of 6.2 miles and provides high-speed carrier service with low error rates.
Common configurations include daisy chain, star (including circuit-switched), ring, and bus.
logical link
The communications path between a processor and a BRI terminal.
loop-start trunk
A trunk on which, after establishing a connection with a distant switching system for an outgoing
call, the system waits for a signal on the loop formed by the trunk leads before sending the digits
of the called number.
call, the system waits for a signal on the loop formed by the trunk leads before sending the digits
of the called number.
LSU
Local storage unit
LWC
Leave Word Calling
M
MAC
Medium access