FreePBX 16– No Audio 2 way and Call Pickup Issues

General Help
1

Hi All,

I’m currently working on a POC (Proof of Concept) setup for a VoIP solution using FreePBX and Asterisk:

  • FreePBX Version: 16
  • Asterisk Version: 18

I’ve purchased 2 DID numbers and a 2-channel SIP trunk from a provider in Singapore for testing.

Setup Details:

  • Asterisk/FreePBX is running on an internal network.
  • Port forwarding is configured for UDP 5060 and UDP 10000–20000 to the FreePBX server.
  • NAT settings are configured with the public IP and internal IP under SIP settings.

I’m new to FreePBX but very interested in VoIP solutions and learning more.

So far:

  • Trunk is configured for both inbound and outbound.
  • Inbound and outbound routes are set up.
  • Extension 200 is registered and connected to the FreePBX server via a WAN IP.

Issues:

  • Outbound calls to mobile numbers connect, but there is no audio in either direction.
  • Inbound calls ring extension 200, but I can’t pick up the call.

Goal:
To successfully make and receive calls from the extension with working audio in both directions.

Any guidance or suggestions on how to resolve these issues would be greatly appreciated!

Thank you!

2

Have you confirmed SIP ALG is turned of on your router?

You’d also need to provide logs/redacted pcaps

3

You can check what @airsay suggested, and you can also go to Settings > Asterisk SIP Settings > Detect Network Settings and check if the External Address is the correct one.