因为使用fxo设备的时候，fxo设备没有联网，所有我要用 telnet 同步一下时间
telnet
10.xx.xx.xx9
telnet
10.xx.xx.xx9
然后就进去了
telnet 172.29.1.6
172.29.1.6Connecting to
172.29.1.6:23...Connection established.
To escape to local shell, press 'Ctrl+Alt+]'.
Welcome to Command Shell!
Username:admin
Password:*****
ROS>en
ROS#^config
ROS(config)#clock ?
ROS(config)#clock set 10/17/2019 18:56:00