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Appendix C Glossary
ASCII -
An acronym for American Standard Code for Information
Exchange. ASCII is a seven-bit code which defines 128 standard characters,
including control characters, letters, numbers, and symbols. An extra 128
characters comprise the extended ASCII set.
Baud Rate -
The transmission rate between two serial devices, e.g.,
modems, fax machines, etc. Measured in Bits Per Second.
Blind Dialing -
In blind dialing, the modem continues to dial, regardless of
the existence of a dialtone, ring, or busy signal.
BPS -
Bits Per Second; the number of bits that can be transmitted in one
second.
Carrier Signal -
The analog data signal that a modem sends over telephone
wires.
COMx -
Where (x = 1, 2, 3, or 4), COMx is the name(address) of serial
communications ports on personal computers. Each serial port in a personal
computer has a different number.
CTS -
Clear To Send.
Default -
The assumed value that is used for a command parameter when
no other value is explicitly provided.
DCD -
Data Carrier Detect.
DCE -
Data Communication Equipment.
DTE -
Data Terminal Equipment.
DSVD -
Digital Simultaneous Voice and Data.
DTMF -
Dual Tone Multifrequency(for touchtone dialing).
DTR -
Data Terminal Ready.
FSK -
Frequency Shift Keying.
GSTN -
General Switched Telephone Network.
Make/Break Ratio -
The ratio of the off-hook (make) to on-hook (break)
interval is the make/break ratio in pulse dialing.
