Apple Express Fax/Modem - Manual (Page 165)

A
analog data Data in the form of continuously variable physical quantities.
Compare digital data.
analog loopback test A simple self-test that directs the modem to display
characters on the monitor screen as they are typed.
analog-to-digital converter A device that converts data from analog to
digital form.
analog transmission Transmission of a continuously variable signal as opposed
to a discretely variable signal. Physical quantities such as temperature are
continuously variable and so are described as analog. Data characters, on the
other hand, are coded in discrete separate pulses or signal levels, and are
described as digital. The normal way of transmitting a telephone or voice
signal has been analog, but now digital encoding is coming into use over
trunk lines. Compare digital signal.
answer mode The connection mode in which the modem answers the
telephone.
153
Glossary