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Abbreviations and Acronyms
A
ABT
Abort Timer OR Answer
Back Tone
ac
Alternating Current
ACK
Acknowledgment, positive
ACR
Abort Call, Retry
ACU
Automatic Call Unit
ADD
Address Field
ADDR
Address
ASCII
American Standard Code
for Information Interchange
(7 level)
AT&T
American Telephone and
Telegraph
B
BER
Bit Error Rate
BERT
Bit-Error-Rate-Test (set)
BIL LB Bilateral Loopback
Bit
Binary Digit
bps
Bits Per Second
BSC
Binary Synchronous
Communications
C
C
Celsius
CA
Circuit Assurance
CC
Carrier Control
CCITT
International Consultative
Committee for Telegraph
and Telephone
CD
Carrier Detect
CFICB
Call Failure Indication -
Local DCE Busy
CFIDT
Call Failure Indication - No
Dial Tone
CFINT
Call Failure Indication - No
Answer Back Tone
CFIRT
Call Failure Indication -
Ringback Detected
Ch Gnd Chassis Ground
CIC
Connect Incoming Call
Appendix G
CO
Central Office
COS
Call Originate Status
CR
Carriage Return
CRC
Cyclic Redundancy Check
CRQ
Call Request
CTRL
Control Field
CTS, CS Clear to Send
D
DAA
Data Access Arrangement
(AT&T)
dB, db
Decibel
dc
Direct Current
DCE
Data Communications
Equipment (modem)
DCD
Data Carrier Detect
DCPSK Differentially Coherent
Phase-Shift Keying
DIC
Disregard Incoming Call
DIS, DS Disable
DLE
Data Link Escape
DLO
Data Line Occupied
DMS
Digital Multiplexer System
DOS
Disk Operating System
DPR
Digit Present
DSR
Data Set Ready
DTE
Data Terminal Equipment
DTMF
Dual Tone Multi Frequency
DTR
Data Terminal Ready
E
EBCDIC Extended Binary Coded
Decimal Interchange Code
(8 level)
EIA
Electronic Industries
Association
EIA-232C,Interface between DTE
EIA-232Dand Data Interchange
Communication Equipment
employing serial binary data
EN
Enabled
ENQ
Enquiry
EOA
End of Address
V.3600
G-1
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