Abstract: A screw hole position detecting apparatus is applied to a board body and at least one screw. The board body defines at least one screw hole. The screw hole position detecting apparatus includes a microprocessor, a lamp group and a camera. The lamp group is configured to illuminate the board body. The camera is configured to photograph the board body to obtain an original image and transmit the original image to the microprocessor. The microprocessor is configured to grayscale convert the original image into a grayscale image, and to convert the grayscale image into a binarization image based on a threshold value. Based on the binarization image, whether the at least one screw hole is locked into the at least one screw is determined.

Abstract: An antenna board alignment method includes following steps: A microprocessor finds a central positioning point on an antenna board to locate a positioning rectangle. The microprocessor finds four inner positioning points on the positioning rectangle to locate the antenna board. The microprocessor finds a plurality of outer positioning points at a plurality of edge locations on the antenna board to locate at least one edge of the antenna board.

Abstract: A telecommunication box connector with a protective outer shield includes a connector main body and a protective outer shield covering onto the connector main body. The connector main body includes a first external connecting portion. The protective outer shield includes a shield member, a second connecting portion protruding out of the shield member and an inner connecting portion formed inside the shield member. The protective outer shield is connected to the first outer connecting portion via the inner connecting portion in order to cover and protect the connector main body. The protective outer shield is installed onto an installation portion of a telecommunication box via the second outer connecting portion. Consequently, it is able to cover and protect the connector main body from damages due to cold weather while maintaining the overall weight with a slight increase only.

Abstract: An outdoor external lightning arrestor includes a transmission line, a signal suppression circuit, insulation housing, a ground member, and a metal housing. The signal suppression circuit includes a circuit board thereon. A first connector, a second connector, and at least one protector are electrically connected to the circuit board. The first connector is electrically connected to the transmission line. The insulation housing is assembled to the circuit board and ground member, and the first resilient plate at one side of the ground member is in electrical contact with the second connector. The insulation housing is installed inside the metal housing, so that the second resilient plate at the other side of the ground member is in electrical contact with the metal housing.