Optical transceiver and control method therefor

A control method for an optical transceiver pluggable to any one of a first apparatus that transmits a first electrical signal at a first transmission rate and a second apparatus that transmits a second electrical signal at a second transmission rate different from the first transmission rate,

• wherein the optical transceiver includes
• a clock recovery circuit that is capable of regenerating a clock signal from any one of the first electrical signal transmitted at the first transmission rate and the second electrical signal transmitted at the second transmission rate,
• a memory that stores a first program including a value of the first transmission rate and a second program including a value of the second transmission rate, and
• a processor that is capable of executing any one of the first program and the second program,
• wherein the clock recovery circuit does not regenerate the clock signal in a case where a transmission rate real value which becomes the value of the first transmission rate when the optical transceiver is plugged to the first apparatus or alternatively the value of the second transmission rate when optical transceiver is plugged to the second apparatus is different from a transmission rate set value, and the clock recovery circuit regenerates the clock signal in a case where the transmission rate real is equal to the transmission rate set value,
• wherein in a case where the optical transceiver is plugged to one of the first apparatus and the second apparatus, the optical transceiver executes one of the first program and the second program that has a higher priority level, so that the processor sets the value of the first transmission rate or the value of the second transmission rate included in the first program or the second program that is being executed to the transmission rate set value and operates the clock recovery circuit, and
• wherein in a case where the clock recovery circuit does not regenerate the clock signal from the first electrical signal or the second electrical signal transmitted from the first apparatus or the second apparatus to which the optical transceiver is plugged, in accordance with an interrupt request from the first apparatus or the second apparatus to which the optical transceiver is plugged, the processor sets the priority level of the first program or the second program that is being executed to be lower than the priority level of the first program or the second program that is not being executed, and boots up.