Signal Transferring Device

A signal transferring device adapted to connect to a communication device via a network cable, the communication device including a first network port and a main board having a power line, a ground line, at least one first control line and a plurality of signal lines, the power line, the ground line, the at least one first control line and the plurality of signal lines being connected to the first network port, the signal transferring device comprising:

• a second network port connected to the first network port via the network cable;
• a third port different from the second network port and connected to the plurality of signal lines and the ground line via the second network port;
• a decoder circuit connected to the power line, the ground line and the at least one first control line via the second network port, the decoder circuit being configured for receiving a signal in relation to a signal receiving strength state of the communication device provided by the at least one first control line to generate a signal strength indicator signal;
• and
• a signal strength indicator unit connected to the decoder circuit and configured for receiving the signal strength indicator signal to display the signal receiving strength state of the communication device.