= W =
war dialer n.
A cracking tool, a program that calls a given
list or range of phone numbers and records those which answer with
handshake tones (and so might be entry points to computer or
telecommunications systems). Some of these programs have become
quite sophisticated, and can now detect modem, fax, or PBX tones
and log each one separately. The war dialer is one of the most
important tools in the phreaker's kit. These programs evolved
from early demon dialers.
--The Jargon File version 4.3.1, ed. ESR, autonoded by rescdsk.