An electronic camera and method of operating an electronic camera which detects whether an external device such as a personal computer is properly connected to the camera and in a state which permits communication. The camera monitors a data terminal ready (DTR) signal of an RS-232 connection in order...http://www.google.com.au/patents/US7889240?utm_source=gb-gplus-sharePatent US7889240 - Digital camera which detects a connection to an external device
