Optical transceiver with two rows of contact pads on both surfaces of the electrical connector

An optical transceiver configured to be inserted into an apparatus in a first direction, the optical transceiver comprising:

• an electrical connector having a first row and a second row, the first row and the second row being arranged in the first direction so that the first row is first inserted into the apparatus and the second row is later inserted into the apparatus when the optical transceiver is inserted into the apparatus, the second row including a first signal pad and a second signal pad, the first signal pad and the second signal pad being arranged in a second direction crossing the first direction, the first row including a third signal pad and a fourth signal pad, the third signal pad and the fourth signal pad being arranged in the second direction, the first signal pad and the third signal pad being arranged in the first direction, the second signal pad and the fourth signal pad being arranged in the first direction;
• an internal circuit configured to be electrically connected to the apparatus through the electrical connector when the optical transceiver is completely inserted into the apparatus, and generate a switching signal after the first signal pad and the second signal pad are electrically connected to the apparatus;
• a first switch configured to isolate the third signal pad from the internal circuit when the third signal pad of the optical transceiver is connected to an electrical connector of the apparatus, and put the third signal pad electrically connectable to the internal circuit in accordance with the switching signal when the optical transceiver is fully inserted in the apparatus;
• and
• a second switch configured to isolate the fourth signal pad from the internal circuit when the fourth signal pad of the optical transceiver is connected to an electrical connector of the apparatus, and put the fourth signal pad electrically connectable to the internal circuit in accordance with the switching signal when the optical transceiver is fully inserted in the apparatus.