The appliance manufacturers hope that appliance wiring wire and cable as accessory to the appliance can pass both 3C and UL certifications.

Discussion on the Similarities and Differences of the Hub,Switchboard and Router;

Design of FPGA-based for RS232 HUB;

Technical Renovation for Power Supply of HUB;

The paper introduces a kind of full electroexchange and program-controlled concentrator with 4 ～16 wire ANDINGS with high reliability,with a programcontrolled by using single chip-com- puters,taking a large-scale IC arrary consisting of analog switches as the exchange-circuits, and a bisound multiplied FREG signals as the transmission way between two terminals.

According to the incompatible problem of the softwares in the old nursing systems,we design a intelligent concentrator that fits in with distributed structure.

The system is composed of an on-the-spot temperature control, a concentrator, a monitoring computer and a communication network.

Design of Virtual USB Hub Based on TCP/IP

This paper aims at realizing the demanding of flushbonding USB HOST interconnects;takes PDIUSBD 12 as USB control chip,through chip drive and control unit data exchange programming,establishes PC-PC USB interface connector,provides USB host with peer to peer function USB equipment interfaces,and sets up unified data buffer,which makes interconnection of the USB hosts without USB hub.