Fiber channel possesses wider bandwidth and higher signal transmission speed than traditional cable channel, which permits the encoder adding more redundant bits in encoding process when the electric signals convert into optical signals by an optic modem to guarantee the reliability and veracity of the communication system. 光纤信道具有比传统电缆信道更高的信号传输速率和更大的带宽,当采用光纤调制解调器(FOM)进行电光信号转换时,可以使用具有较多冗余位的编码方式来保证信号传输的准确性和可靠性。