
A transmission from a receiving data processing device in response to a request from a transmitting data processing device that it is ready to accept or has received data.
Found on
http://www.encyclo.co.uk/local/20957

Answer Back is an electrical and/or visual indication to the call originating end that the call terminating end is on the line. First associated with the International Telex network, answerbacks are also recommended in CCITT-standard fax machines and are provided in most PC data communications software packages.
Found on
http://www.probertencyclopaedia.com/browse/GA.HTM
No exact match found.