After the device is installed, the user needs to enter the ESN . Since the label is too small, it is often the case that the user cannot identify the ESN, which actually can be queried by command.
1. Run the display license command to query the ESN. However, obtaining the ESN code with this command may fail on certain devices.
Device ESN is: 210305G021Z098000027
2. If the preceding command fails, query the electric label as follows:
BarCode=210305G021Z09B000010 //ESN code