No inward audio

General Help
1

Good Afternoon,

We are very new to Asterisk/FreePBX and are installing and testing Asterisk Now 1.4.28 using FreePBX 2.5.2.2

We have just setup a SIP Trunk and whether we call outwards or inwards we cannot hear the audio from the external party. All internal calls are working well.

I suspect we have missed something obvious.

Any help would be appreciated. Many thanks.

2

Usually one way audio is a symptom of a misconfigured firewall or not having nat=yes in the extension configuration. Here’s a webpage that talks about slipping SIP past the firewall:
http://www.cadvision.com/blanchas/Asterisk/Configuringafirewall.html