Systems and methods for strobe signal timing calibration and control in strobe-based memory systems are provided below. Connections of the sensor extend longitudinally of the waveguide and are connected to the outer wall of the waveguide and the central conductor of the coaxial cable that powers the waveguide. Each group represents a certain type of channel, for example, alarm calls, area codes, companies, etc. A top electrode is then formed on the resistive layer, wherein the top electrode is selected from the group consisting of indium tin oxide and indium zinc oxide. On the other hand, if the user does not want to talk to the caller, he depresses an automatic answering mode setting key or a disconnection key. Since photograph numbers of image data stored in a memory card are defined in relation to output subject identifiers, such image data to be printed out can be designated.