A connector has a housing including a terminal mounting portion, a receptacle and a mounting flange between the terminal mounting portion and the receptacle. The samples are continuously correlated with a predetermined preamble sequence to develop a correlation value. The pet collar is adjustable to accommodate a variety of neck sizes of an animal. A thickness of the resin is thinner on the high-temperature side than on the low-temperature side. 3 to 50, and wherein the total size of an area of the mixed layer in which an attached amount of P is equal to or more than 20 mgm2 is 20% to 80% of a surface area of the mixed layer. Only then, resources are allocated and a TCP connection is actually established, after which, listening state is returned to in order to keep processing all received TCP messages.