Device connection error
1.If your device is in that state:
The reason for this state is :
The device was connected to FACS but not register.
Register a SIP line for the device,the status will transform to 
.
2.If your device is in that state:
Please refer to last chapter to reconnect the device.
Author：Vertin Create time：2023-12-18 13:48
Last editor：Vertin Update time：2023-12-27 14:08
Last editor：Vertin Update time：2023-12-27 14:08
