Global unique ID of device, in HEX format. The MAC address can be found on  the 
label coming with original box and on the label located on the bottom of the device. 
Storage Usage 
Users could access the storage usage information from web UI->Status->System Status->Storage Usage. It 
shows the available and used space for Space Usage and Inode Usage. 
 
Space Usage includes: 
 
  Configuration partition 
This partition contains PBX system configuration files and service configuration files. 
  Data partition 
Voicemail, recording files, IVR file, Music on Hold files and etc. 
  USB disk 
USB disk will display if connected. 
  SD Card 
SD Card will display if connected. 
 
Inode Usage includes: 
 
  Configuration partition 
  Data partition 
 
Note: Inode is the pointer  used for file reference in the system. The system usually has limited resources of 
pointers