I didn't find this ATA in the list of devices when I was setting it up. it makes sense to enable STUN on this extension but what device should I choose?
do you mean 3CX activity log or ATA activity?The activity log won't be "blank" as the log show all call processing, but, there may not be a registration attempt showing. That usually means that the ATA server information, or perhaps, port, is not set to correctly reach the 3CX server, or, something is blocking the attempt.
no, the IP is whitelisted. I assume somehow I have to add MAC Address in to 3CX server. to let the server and device see each other. I still didn't figure out where should I add the MAC Address?The 3CX Activity Log. That will show if the ATA is even reaching the PBX, or reaching it, and being rejected, for some reason.
I will try to work more on it. I should mention that I am using the standard edition. Do you think that can cause this issue?No, the MAC is not used if you are manually configuring the device.
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