A system for retrieving contact details using a print medium is disclosed. A column upstands from the base and carries at its upper end a camera platform having an upper camera mounting surface. The computer identifies one or more candidate chunks within the customized data model in accordance with a set of heuristic rules associated with the structure type. The phase angle of the second reference clock signal is 90-degree lagging behind the phase angle of the first reference clock signal. The cell phone receiving the call acts as a PSTN cordless telephone Gateway cell phone via the cellular network, while the other cell phone acts as a cordless telephone Terminal cell phone.