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