Method and apparatus for providing an alarm call to a remotely located user using a DISA line in a private exchange

摘要

A method and apparatus for providing an alarm call using a DISA line in a private exchange includes: storing a password for limiting the use of the DISA line; externally connecting the DISA line to thereby receive an alarm call request; receiving an alarm call request and password from a user when the user is connected to the DISA line; storing time and telephone number to which the alarm call is to be sent, if the password input by the user is identical to the stored password; periodically comparing the stored time with a current time; and dialing the stored telephone number to provide an alarm call when the current time is identical to the stored time.