A method and apparatus for managing incoming and outgoing calls at an endpoint placed on hold are disclosed. A toe notch is formed in the lower part to separate the lower part into a big toe accommodating pocket and a second pocket for accommodating the remaining toes. A confocal detector of the electromagnetic radiation is placed at a first location for receiving reflected radiation which is substantially optically collinear with the incident beam of electromagnetic radiation. One or more dialogue sessions are provided to gather information necessary for making a determination on the admissibility of the scientific study.