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FSU ....................
frame relay service unit
FT1 .....................
fractional T1
GUI....................
graphical user interface
HDLC................
high-speed data link control
IA .......................
inactive
internet protocol
IP........................
integrated services digital network
ISDN .................
ITU ....................
International Telecommunications Union
IXC.....................
interexchange carrier
KA .....................
keep alive
kbps...................
kilobits per second
local area network
LAN...................
LBO ...................
line buildout
LEC....................
local exchange carrier
LED ...................
light emitting diode
LI........................
link integrity
logical link control
LLC....................
loss of signal
LOS ...................
LMI....................
local management interface
LRC ...................
lateral redundancy check
MIB ...................
management information base
ms ......................
millisecond
network interface
NI.......................
office channel unit
OCU ..................
OOS...................
out of service
POP ...................
point-of-presence
PPP ....................
point-to-point protocol
PRM ..................
performance report message
Primary Rate ISDN
PRI.....................
61200275L1-1
Appendix C. Acronyms and Abbreviations
TSU IQ+ User Manual
C-3
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