Abstract: A transfer apparatus comprising a first switch configured to generate a first timing pulse based on a reference clock, transmit first information related to the first timing pulse, a second switch configured to, generate a second timing pulse based on the reference clock, transmit second information related to the second timing pulse, a line interface configured to receive signal data and store the signal data in a memory, transfer the signal data based on the first timing pulse when the first information is received, and transfer the signal data based on the information when the first information is not received and the second information is received, detect a phase shift between the first timing pulse and the second timing pulse, transmit the phase shift to the second switch, wherein the second switch is configured to correct, based on the phase shift, a timing that the second timing pulse is generated.