Patent ID: 7595736

Claim:
A network status indicating circuit for indicating network status, the network status indicating circuit comprising: a signal generating unit configured for being set in a kernel board, the signal generating unit comprising a signal transition circuit with two input terminals and two output terminals, and a first type of network IC with a Speed pin and a Link pin connected to the two input terminals of the signal transition circuit respectively for sending status signals to the signal transition circuit, the signal transition circuit comprising a first transistor, a second transistor, and a third transistor, a base of the first transistor acting as one of the input terminals of the signal transition circuit connected to the Link pin of the network IC, an emitter of the first transistor connected to the Speed pin of the network IC, a base of the second transistor acting as the other one of the input terminals of the signal transition circuit connected to the Speed pin of the network IC, an emitter of the second transistor connected to a power supply source, a collector of the second transistor connected to an emitter of the third transistor, a base of the third transistor connected to the base of the first transistor, collectors of the first transistor and the third transistor acting as the two output terminals of the signal transition circuit; and an indicator circuit with two input terminals configured for being set in a device board, the two output terminals of the signal transition circuit connected to the two input terminals of the indicator circuit respectively.