I'm trying to get an AudioCodes MP-114 FXS_FXO configured with my 3CX system and I've been having issues getting things routing correctly. On the 3CX Side I have: Generic SIP SIP trunk using IP based authentication and both DIDs configured for the 2 FXO connections. One is a POTS line once I get everything working right that directs to a ring group and one is an OOMA Telo that is used for incoming only (that DID directs to my extension voicemail). Two extensions for the FXS ports (one will be used by a cordless phone, the other is for another if needed later). One the Gateway I have it currently configured for Per Endpoint registration and have the FXS ports registering. From my testing today: Calls from SIP extension to the Gateway extension worked fine. Calls from SIP extension to outside number seemed to work (needs more testing to be sure..my cell had no signal when trying to test). However, calls from Gateway Extension to SIP extension or to outside numbers both caused it to ring the PBX like an incoming call from the POTs line, instead of going outside or to the correct extension. With the Gateway to SIP tests I did it both when I had no registration in place and with the FXS ports registered and it behaved the same Has anyone had success getting something like this configured properly? This is the first time I've worked on setting up a proper gateway - I use a DAHDI card in the old PBX system that I'm trying to replace. I can post more detailed configs if that would be helpful. Thank you!