Something weird with Asterisk 11 and portGo that drove me nuts and finally figured the damn thing out.
So here’s my issue, when I use Asterisk 11 and port go, calls signaling can work but as soon as audio is to be transmitted, it hang up the call. After debugging on Asterisk, found that it was a remote disconnection request. Then it was obvious it is something to do with RTP, so I went into PortGo’s setup and click on Misc there was the RTP setting. I had to manually set the RTP setting there to something like 12000 to 12020, or whatever range of your fancy. And now it works, damn..