Small form-factor pluggable transceiver

A small form-factor pluggable transceiver with support for copper cable transmission, configured to couple to a copper cable connector and a network device, and the small form-factor pluggable transceiver comprising:

• a first connection port, configured to connect to the copper cable connector, and transmit and receive a copper cable-type signal source provided by the copper cable connector,
• a conversion unit, coupled to the first connection port, and configured to convert the copper cable-type signal source into an Ethernet frame, the conversion unit comprising:
• a bandwidth indication pin, configured to indicate a rate of a signal source of an optical cable, and configured to be unable to indicate the rate of the copper cable-type signal source and be a low voltage,
• a transceiver unit, coupled to the conversion unit, and configured to bidirectionally transmit the Ethernet frame, the transceiver unit comprising:
• a detection pin, coupled to the bandwidth indication pin, and configured to be adjusted to a first voltage level based on that the rate is a valid rate and to be adjusted to a second voltage level based on the low voltage level, and
• a second connection port, coupled to the transceiver unit, and configured to connect with the network device,
• wherein the transceiver unit operates in a normal state based on providing the first voltage level by the detection pin, and operates in an abnormal state based on providing the second voltage level by the detection pin;
• the detection pin is coupled to a ground point, so that when the bandwidth indication pin is at the low level based on the signal source being the copper cable-type signal source, the detection pin provides the first voltage level by being coupled to the ground point.