Exemplary methods and systems for applying a correction to an initiated signal are disclosed. A message is sent to a Privileged Accounts manager when a user logs into a Privileged Account. In this way, the acquired performance data are reformed into performance data for the special-type tone generator. The direction of the tuning step can be determined by comparing multiple frequency offsets. In one embodiment, the method includes identifying a remote client operating in a public network outside the private network, initiating a secure communication channel with the remote client, and instructing the remote client to initiate a Point-to-Point Protocol session with the computer server via the secure communication channel. Data communication can be performed between the microcomputer 52 and the sensor circuits 50A-50D through the serial clock line 53 and the serial data line 54.