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ASCIIASCII
American Standard Code for Information
Interchange. A 7-bit binary code (0s, 1s)
used to represent letters, numbers, and
special characters such as $, !, and /.
Asynchronous TransmissionAsynchronous Transmission
Data transmission in which the length of
time between transmitted characters may
vary. Because the time lapses between
transmitted characters are not uniform, the
receiving modem must be signaled as to
when the data bits of a character begin and
when they end. The addition of Start and
Stop bits to each character serves this
purpose.
Auto AnswerAuto Answer
Sets the modem to pick up the phone line
when it detects a certain number of rings.
See S-register (S0) in the Technical Quick
Reference.
Baud RateBaud Rate
A term used to measure the speed of an
analog transmission from one point to
another. Although not technically accurate,
baud rate is commonly used to mean bit
rate.
Binary DigitBinary Digit
A 0 or 1, reflecting the use of the binary
numbering system (only two digits). Used
because the computer recognizes either of
two states, OFF or ON. Shortened form of
binary digit is bit.
Bit RateBit Rate
Also referred to as transmission rate. The
number of binary digits, or bits,
transmitted per second (bps).
Communications channels using telephone
channel modems are established at set bit
rates, commonly 300, 1200, 2400, 4800,
9600, 14,400, and higher.
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