I am trying to connect a SPA122 to a 3CX PBX running in the cloud.  Can anyone point me to documentation describing how to configure it? 

I have a SPA122 connected to a Cudatel communication server.  Line 1 Is defined to an extension in the server and works fine.  Line 2 is not visible to the server so I cannot link it to an extension.  I understood that the SPA122 should present a sec...