A method and apparatus for performing handover on a voice call between a packet network system and a circuit network system is provided. When in the celebrity mode, a celebrity signal indicating that a photograph of the first user is desired, is transmitted to at least one second communication device operable in the paparazzi mode. The human body feature point specifying unit specifies a predetermined human body feature point of an operator in each of the images. These mechanisms perform the functions including but not limited to handling uncertain data arrival times, detecting single bit and multi-bit errors, handling communications link failures, addressing failed link training, identifying and marking data as corrupt, and identifying and processing successful data transactions across the communications link.