Wondering if someone can help me please. I'm new to this & can't get my SPA514G (firmware 7.6.1) to register with 3CX (V15.5) install. I installed 3CX Debian on VmWare workstation 14 Pro (14.1.0), running on WIN7 pro SP1. Everything seem to be ok, I was able to register 3CX soft phone for Windows but cisco SPA514 won't register. Web interface of the phone says "Failed-No Response". Two extensions on 3CX dashboard, one with soft phone is green and one with SPA514 is red. Can someone tell me what can I possibly doing wrong. I had exact same issue last week with Distro FreePBX (10.13.66-64bit) also. But in that case both the phones failed to register (with message, "Failed Authentication") that is X-lite soft phone (V5.1.0) as well as same SPA514. Someone else had them set up for me & had them working, but since I wanted to practice myself, I tore it down & wanted to do it myself but was never able to get it to work. Any feedback is appreciated. Thank you in advance.