A solid-state image pickup device includes an adder adding signals from pixels to achieve a high SN, while performing both static image and moving image pickup. The substrate containing glass forming raw materials may be formed so as to have a Young’s modulus of 110 or higher. Further, a network user can select to report intra-node feedback andor inter-node feedback based on network instructions, a cooperation strategy to be utilized by respective network nodes, or the like. The insulating boot may include an insulating tube, and at least one rupturable seal closing the insulating tube and rupturing upon initial insertion of the cable end therethrough. The retainer secures the splices in a static position to prevent them from being damaged.