Issue:

in Router web status menu, it indicates "open device error" or "Can't open device /dev/ttyUSBx"

 

Related Pictures:

open device error

 

Main Cause and Solution:

Item Cause Solution
1 Web not refreshed

Wait some seconds until the router web refresh.

Follow manual chapter "3.3.3.1 WAN – Cellular Network" to set the "Cell Modem" to "AUTO"

2 the module inside the router is loosen Open the router case, re-install the radio module
3 Module is failed Contact E-Lins to order new or repair
4 PCBA board is failed Contact E-Lins to order new or repair