Incoming call are not working


Good day all,

I have a Grandstream UCM6108 IPBX. My problem is this: I have 8 Analog PSTN lines and all of them even though they are connected and shows Idle on the Dashboard, the IPBX is not detecting any incoming calls on them, the physical Trunk light on the IPBX is blinking whenever the call is made.

Any thoughts or assistance on this would be greatly appreciated.


Remove the detect caller ID function.