Abstract: A relay device, which transmits/receives a packet to/from a tunnel communication establishing device located in a first communication area in order to establish tunnel communications between a client located in the first communication area and a server located in a second communication area, includes: a determination unit that determines based on preset threshold value information whether an actual payload part of a reception packet transmitted from the client or the server needs to be embedded; a translation unit that generates dummy payload identification information when it is determined that the actual payload part of the reception packet needs to be embedded, and alternatively sets a dummy payload part including the generated dummy payload identification information and information indicating an embedment-enabled state in place of the actual payload part of the reception packet; and a transmission unit that transmits the packet including the dummy payload part to the establishing device.

Abstract: A molded transformer includes a transformer body including a coil bobbin having a spool having a central through-hole and a collar at each of two ends thereof, and a conductive wire, such as a copper wire, wound around the spool, and an EE type or EI type ferrite core which is inserted into the coil bobbin; and a thermoplastic resin for molding the transformer body in such a manner that only a terminal portion used for mounting is exposed through the resin. The resin has a low molecular weight, ensuring a low molding stress and a low melting viscosity.

Abstract: An encased transformer that comprises a bobbin including a plastic-molded cylindrical portion and upper and lower collars formed respectively at upper and lower ends of the cylindrical portion, a magnetic element extending centrally through the cylindrical portion, primary and secondary coils wound round the outer periphery of the cylindrical portion, comb-shaped metals terminal formed on the pair of lower collars by insert molding, the comb-shaped portion of each metal terminal being bent at generally right angles, the metal terminals being further bent at right angles and outwardly horizontally at an end portion thereof so that the metal terminal is substantially Z-shaped, a straight portion of the metal terminal positioned midways of the Z-shaped being fixedly held in position between the inner wall of a case and a frame wall having recessed terminal grooves into which are individually fitted metal terminals provided in a plastic square bottom plate.