Abstract: When a communication route is established between SIP servers #1 and #3, an SIP server #2 performing a relay between the servers #1 and #3 receives an INVITE signal from the SIP server #1, not describing track information about the SIP server #2 in a Via header and a Record-Route header of the INVITE signal, but transferring the signal to the SIP server #3. Thus, after the transferred INVITE signal, the signal transmitted and received by the SIP servers #1 and #3, does not include the track information about the SIP server #2, thereby transmitting the signal without passing through the SIP server #2.

Abstract: A cooling apparatus includes a bypass provided to a path extending from a compressor to an expansion valve via a condenser, and a unit for controlling a ratio of a flow rate of a refrigerant of the path via the condenser to that of the bypass path, or a unit for varying an air volume of a fan of an outdoor unit for blowing the condenser so as to vary a capacity of the condenser. The degree of superheat of the refrigerant is measured at an exit of the evaporator, and an expansion valve is controlled in accordance with the measured degree of superheat.

Abstract: Small-size electronic parts having leads are packaged with a carrier tape composed of a tape base having tape feed holes and a tape body of formed plastic attached to the tape base. The carrier tape is unreeled from a supply reel, and the leads of the electronic parts are caused to pierce the tape body. The carrier tape with the electronic parts retained on the tape body is wound around a takeup reel.