According to the invention, a process for authorizing an online purchase between a customer and a vendor site is disclosed. An audible disruptive sound is played adjacent to the telephone with a sound generating assembly. If at least one potential artificial algebraic loop exists in the process, an artificial algebraic loop solution manipulates the order or manner by which the functions are executed to eliminate or otherwise resolve the artificial algebraic loop. Furthermore, the light-source lamp, the optical elements, and the like can be prevented from deteriorating by controlling the rotation speeds of the other fans based on detected temperatures detected by temperature sensors. The PLL also provides a stable output frequency during freerun periods, and a phase booster circuit for post-freerun fast phase recovery.