wrong button and the network management certainly does not want to antagonize a valid caller by refusing to complete his call the detailed discussion of the call intercept subsystem and process is disclosed in co application entitled u201c method for controlling fraudulent telephone calls u201d filed on aug 16 1993 having application ser no 106 990 and assigned to the same assignee as the instant invention the disclosure of the 39 990 application is incorporated herein by reference given that voice technology at least with respect to voice recognition and voice verification is not perfect the network management of the system has to accept a certain percentage of false acceptance and a certain percentage of false rejection for a very secure product the percentage of rejection and acceptance may be set to a very low percentage however this would not be acceptable since it is not desirable to reject a caller out of hand just because the caller may have a cold or may be calling from a high noise environment such as for example a steel mill in other words it is fine and good for a valid caller to call from an originating phone in an office but not so good when.