Methods, systems and apparatus for identifying modified images based on seed images that are known to be modified images. In a second embodiment, the pointer transmits a single frequency modulated light beam. Provided on an end face of a casing of a rigid tip end section of the insertion instrument are at least a illumination window, an observation window and an exit opening of a biopsy channel. The method also includes presenting the at least one modified target time associated with handling the first call to the first agent. The assembled TIAEIA-136 frame is then sent using existing transmission code.