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Appendix C. Acronyms/Abbreviations
C-2 T3SU 300 User Manual 61200217L1-1
DDS................... digital data service
DLCI.................. data link connection identifier
DS1 .................... digital signal level one
DS3 .................... digital signal level three
DSR ................... data set ready
DSU................... data service unit
DTE ................... data terminal equipment
DTR................... data terminal ready
ES....................... errored seconds
EXZ.................... excessive zeros
FBE..................... F-bit errors
FCC.................... Federal Communications Commission
FDL.................... facility datalink
FEBE.................. far end block error
HSSI.................. high-speed serial interface
IP........................ internet protocol
KA...................... keep alive
LAN................... local area network
LCV ................... line coding violation
LED.................... light emitting diode
LES..................... line errored seconds
LL....................... local loopback
LOS.................... loss of signal
MBE................... M-bit errors
Mbps ................. megabits per second
MIB.................... management information base
ms....................... millisecond
NC...................... normally closed
NI....................... network interface
NMS.................. network management system
NO ..................... normally open
NRZ................... non-return to zero
OCU................... office channel unit