Can't dial an extension or other number but can receive calls - Grandstream WP826

FreePBX Endpoints
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Hello everyone,

I’m facing an issue with my Grandstream WP826 WiFi Phone. The phone is registered successfully on my FreePBX server, and it can receive calls without any problems. When I receive a call, I can pickup the call and everything works perfectly: audio, DTMF, and all functionalities.

However, the issue arises when I try to make an outbound call (e.g., dialing another extension). The call does not go through, and the phone does not establish a connection. On the phone it says Call failed: NO RESPONSE.

I’ve double-checked the settings on both the phone and FreePBX, but I haven’t been able to resolve the issue. I’ve uploaded detailed configuration screenshots for both the phone and FreePBX to my Google Drive: https://drive.google.com/drive/folders/14iNKtr37l5lxKrlllqCMht2XHsb7Yq0_?usp=sharing

If anyone has experience with this setup or could help me troubleshoot, I would really appreciate it!

Thank you!

2

This problem has been fixed by setting the Preferred Vocoder to PCMU (G.711u) and G.722.

Special thanks to this post:

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