If you system is damage and you have to redo system.so pls follow next step
Step1:
1.About v1 ,pls download the v1 image
2.About v2(2.X software),pls download v2 image
3.About the v3 (3.X software),Please download V3 image
4.About the v4 (4.X software),Please download 43 image
5.Notice:pls reflash system as your device model cause it is different hardware .
you can find the SD card inside of the device,picture in below
Step2:
Reinstallation of IPPBX from a Windows flatform
Notice: DONT format the SD card on windows computer,just follow below steps,
1. Download image from below options:
2. DownloadWin32 Disk Imager to WRITE the Image to your SD card.
install the tool at first;then decompress our image file as the picture
.

3. Run Win32DiskImagerto install the image ,Wait for about10 minutes as it WRITE image to SDcard.
4. Once the WRITE is SUCCESSFUL, remove SD card from your PC and transfer to PBX.
support team
20180712