
Appendix C. Acronyms and Abbreviations
CSU | channel service unit |
CTS | clear to send |
CV | code violation |
dB | decibel |
DBU | dial backup |
DCD | data carrier detect |
DCE | data communications equipment |
DDS | digital data service |
DE | discard eligible |
DLCI | data link connection identifier |
DS0 | digital signal level zero |
DSAP | destination service access point |
DSR | data set ready |
DSU | data service unit |
DSX | digital signal cross connect, level 1 |
DTE | data terminal equipment |
DTR | data terminal ready |
EA | extended address |
EBCDIC | extended binary coded decimal interexchange code |
EER | excess error rate |
ESF | extended superframe |
FCS | frame check sequence |
FDL | facility data link |
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 |
TSU IQ+ User Manual |
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