Method and device for transmitting and receiving data by transmission equipment

The invention is concerned with the method and the equipment that provides the data sending and receiving on the transmission equipment, in order to solve the problem that the utilance of the WAN side bandwidth. It includes the following steps: saves and reads the single data frame after receiving some data frames, compresses the part or whole content except the incept delimiter and the finish delimiter after reading the data frame, sends the data frame, receives the compressive data frame and processes sealing then send it. The receiving method is using the reversible process to receive. The invention is: the sending equipment adds the fiber channel sending frame recognition selecting module and the compressing module, the receiving equipment adds the fiber channel sending frame recognition selection module and the decompressing module, solves the problem that the utilance of the WAN side bandwidth by sending and receiving the data frame.