If the serial interface is configured with another encapsulation protocol, and the encapsulation must be changed back to HDLC, enter the interface configuration mode of the serial interface.
If the serial interface is configured with another encapsulation protocol, and the encapsulation must be changed back to HDLC, enter the interface configuration mode of the serial interface.
如果该串列介面被组态成其他的封装协定，必须输入该串列介面的介面组态方式，将封装方法改回高阶资料连结控制。