ADTRAN 4200659L1 - Manual (Page 170)

Appendix C. Acronyms/Abbreviations
C-2 MX2800 STS-1 User Manual 61200659L1-1
CRC ................ cyclic redundancy check
CS.................... clear to send
CSES ............... C-bit severely errored seconds
CSU ................. channel service unit
CTS ................. clear to send
CV ................... coding violation
dB .................... decibel
DBU ................ dial backup
DCD ................ data carrier detect
DCE ................ data communications equipment
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
DSX-1.............. digital signal cross connect, level 1
DTE................. data terminal equipment
DTR ................ data terminal ready
ES .................... errored seconds
Eq .................... equipment
Eqpt ................ equipment
EXZ................. excessive zeros
FBE ................. F-bit errors
FCC................. Federal Communications Commission
FDL ................. facility datalink
FEAC .............. far-end alarm and control