communications: The ability of a modem to answer a phone call. You tell the modem to do this by typing "ATA" and hitting the Return key (to answer right away, "ATS0=1" to answer the next call on the first ring, with Hayes-compatible modems) in most terminal programs. The modem detects a ring and answers the phone without assistance from a program. This is a standard feature of any decent direct-connect modem.
This is when a modem, phone, or other device has the capability to automatically set up a connection with an incoming transmission.
A feature of modems to answer automatically in phone calls for data communication