I was trying to get TelNYX working on the e911 service with FusionPBX> There were a couple of threads in this forum, but no real direct answers. After reading several threads on this forum and some other forums, I got it working. the short answer is to go to the gateway for your provider, click "Advanced" button about half way down, then find the filed "Caller ID In From" set to true and then restart the gateway. Make sure you have the E911 service config'd on TelNYX site, and complete the "Emergency Caller ID Number" on the appropriate Extension profile.