Abstract: A method for utilizing a household's existing telephone line wiring and existing analog telephone sets to make VoIP calls and PSTN calls is provided. The method allows the installation of a simple VoIP routing device in the existing wiring without restructuring of the existing wiring or a deployment of a totally separate network. The method deploys a number of mapping devices to take advantages of the un-used wires in the existing wiring. The mapping devices are installed between the wall jacks and the phone sets, and between a wall jack and the VoIP routing device. The installation of the mapping devices is easy and requires no special tools and experienced personnel.

Abstract: A computer input/output (I/O) cable plug retaining seat comprises a retaining cover and a base. The seat can be connected to a computer I/O plug, such as a well-known CENTRONICS cable plug. Four screws are used to secure the cable plug between the retaining cover and the base. A pair of fixing screws secure the retaining seat with cable plug to the rear cover of an equipment shelf so that when a channel unit slides from the card guide of the equipment shelf, the channel unit connector will be led into the guide holes by means of guide pins so that the channel unit connector is precisely aligned with the cable plug. When a user wishes to remove the channel unit from the equipment shelf, the channel unit is extracted directly without having to disconnect the cable. Thus, the objective of rapid assembly and disassembly is achieved.

Abstract: A SCSI cable plug retaining seat includes two guide holes, two guide pins, and a seat. The two guide holes are combined to the upper and lower grooves of the cable plug. The two guide pins are installed to a channel unit connector. The seat has an L shape and the bottom thereof having an opening and has two screws and two screw holes. The retaining base of the present invention serves to fix the cable plug by the screw, and then is locked to the rear covering plate of the shelf. When the channel unit slides into the shelf through card guide, the channel unit connector will be guided into the guide holes by the guide pins so that the channel unit connector is precisely combined to the cable plug. Therefore, the connector can be pulled and inserted rapidly.