US Robotics 33600 User Manual page 70

Serial transmission
Sequential data transfer, one bit at a time, using only one
electrical circuit.
Synchronous transmission
Data transmission during which both communicating devices are
synchronized by a common clock. Using this mode eliminates the
need to systematically add a stop bit and a start bit to each
transmitted character.
Terminal mode
Required simulation mode for computers to transmit data. In
terminal mode, the computer acts as though it were a dumb
terminal rather than a data processing unit. Keystrokes go
directly to the modem whether they are modem commands or
data to be transmitted via the telephone lines. Received data are
displayed directly on the screen.
Terminal
A unit whose keyboard and screen are used to send and receive
data via a communications link. A terminal differs from a micro-
computer in that it has very little or no internal processing
capabilities.
Transmission rate
Number of bits transmitted per second (bit/s). Communications
channels using modems on telephone lines are set to binary
rates, generally 2400, 9600, 14400 or 28800.
Xmodem
The first of a family of error correction software protocols used
to transfer files between modems. These protocols are in the
public domain and are available on many servers. Ymodem and
Zmodem are later protocols.
66 Sportster Winmodem 33600 & x2/56K - User's manual