ADTRAN Express 5200 User Manual page 158

Appendix C.Acronyms/Abbreviations
DLCI.................. data link connection identifier
DSAP................. directory scope analysis program
DSR ................... data set ready
DSU ................... data service unit
DTE ................... data terminal equipment
DTR ................... data terminal ready
FECN ................. forward explicit congestion notification
FEP..................... front end processor
FIFO................... first in first out
FR....................... frame relay
FRAD ................ frame relay access device
FRF..................... frame relay forum
FSU .................... frame relay service unit
HDLC ................ high-speed data link control
IP........................ internet protocol
ISDN ................. integrated services digital network
ITU..................... International Telecommunications Union
KA...................... keep alive
LAN ................... local area network
LED.................... light emitting diode
LLC .................... logical link control
LMI .................... local management interface
LRC.................... lateral redundancy check
MIB.................... management information base
ms....................... millisecond
NRZ ................... non-return to zero
NRZI ................. non-return to zero inverted
OCU................... office channel unit
OOS................... out of service
C-2 Express 5200 User Manual 61202175L1-1