3Com 56K Command Reference Manual page 198

2 G
LOSSARY
asynchronous
transmission
auto answer
auto dial
Automatic Repeat
Request (ARQ)
baud rate
binary digit (bit)
bit
bit-mapping
bit rate
bps
buffer
dynamically reverse the channels during a call if the volume of data
transfer changes.
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.
A feature in modems enabling them to answer incoming calls over the
phone lines without the use of a telephone receiver.
A feature in modems enabling them to dial phone numbers over the
phone system without the use of a telephone transmitter.
A general term for error control protocols which feature error detection
and automatic retransmission of defective blocks of data. See HST,
MNP, and V.42.
The number of discrete signal events per second occurring on a
communications channel. Although not technically accurate, baud rate
is commonly used to mean bit rate.
A 0 or 1, reflecting the use of a 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.
See binary digit.
A technique that lets one decimal number (in this case, a number
between 0 and 255) stand for up to 8 separate binary settings.
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,
14400, and 28800.
The bits (binary digits) per second rate.
A memory area used as temporary storage during input and output
operations. An example is the modem's command buffer. Another is
the Transmit Data flow control buffer used for flow control and to store