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G
LOSSARY
7-2
auto-dial
A process where your modem dials a call for you.
The dialing process is initiated by sending an
ATDT (dial tone) or ATDP (dial pulse) command
followed by the telephone number. Auto-dial is used
to dial voice numbers. See command Dn.
baud 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 digit
A 0 or 1, reflecting the use of the binary numbering
system. Used because the computer recognizes
either of two states, OFF or ON. Shortened form of
binary digit is bit.
bit rate
Also referred to as transmission rate. The number of
binary digits , or bits, transmitted per second ( bps ).
Communications channels using analog modems
are established at set bit rates, commonly 2400,
4800, 9600, 14,400, 28,800 and higher.
bits per second (bps)
The bits ( binary digits ) per second rate. Thousands
of bits per second are expressed as kilobits per
second (kbps).
buffer
A temporary memory area used as storage during
input and output operations. An example is the
modem's command buffer.
byte
A group of binary digits stored and operated upon
as a unit. Most often the term refers to 8-bit units or
characters . One kilobyte (KB) is equal to 1,024
bytes or characters; 640 KB is equal to 655,360
bytes or characters.
carrier
The basic signal altered or modulated by the modem
in order to carry information.
character
A representation, coded in binary digits , of a letter,
number, or other symbol.