A method of sending image signal data from a camera to a CCTV network receives images via a camera lens and image sensor as well as receiving analog video signals corresponding to views from outside the camera via an analog video input connector. Image signal data corresponding to the images received by the sensor is output, and image signal data corresponding to the analog video input connector is also output. The image signal data is stored on a storage device. A network adapter of the camera connects to an internet-protocol address corresponding to a network device capable of serving files. The image signal data of the image sensor or image signal data of the analog video input connector are selectively transmitted from the storage device to the network device using the network adapter and the internet-protocol address.