Specifications

<C#>-B V.3229 / V.3229L
<Re
f
erence>
A
bbreviations and Acronyms
CR
Carriage Return
CRC
Cyclic Redundancy Check
CRQ
Call Request
CSA
Canadian Standards Associ-
ation
CSDC
Circuit Switched Digital Ca-
pability
CSU
Channel Service Unit
CSULL
Channel Service Unit Local
Loopback
CTRL
Control Field
CTS, CS
Clear to Send
D
DAA
Data Access Arrangement
(AT&T)
dB, db
Decibel
dc
Direct Current OR Digital
Connection
DCE
Data Circuit Terminating
Equipment OR Data Com-
munications Equipment
DCD
Data Carrier Detect
DCPSK
Differentially Coherent
Phase- Shift Keying
DDD
Direct Distance Dialing
DDS
Digital Data Service OR
Dataphone Digital Service
(AT&T)
DDS/MR
Digital Data Service / Multi
Rate
DIC
Disregard Incoming Call
Dip
Dual In-line Package
DIS, DS
Disable
DLE
Data Link Escape
DLO
Data Line Occupied
DMS
Digital Multiplexer System
DOC
Department of Communica-
tions (Canada)
DOS
Disk Operating System
DPR
Digit Present
DRS
Data Rate Select
DSR
Data Set Ready
DSU
Data Service Unit
DTE
Data Terminal Equipment
DTMF
Dual Tone Multi Frequency
DTN
Dial Tone Detected
DTR
Data Terminal Ready
E
EBCDIC
Extended Binary Coded
Decimal Interchange Code
(8 level)
EIA
Electronic Industries Asso-
ciation
EIA-232C,
EIA-232D
Interface between DTE and
Data Interchange Communi-
cation Equipment employ-
ing serial binary data
EN
Enabled
ENQ
Enquiry
EOA
End of Address
EOM
End of Message
EON