FreePBX Fire Alarm Audio Alert Setup

I'm looking for a professional who can configure an audio fire alarm alert in my FreePBX system. The alert needs to be played over specific extensions, not all of them.

Key requirements:
- Extensive experience with FreePBX
- Understanding of audio alert systems
- Ability to configure specific extensions for alerts

Please note that the configuration doesn't require pre-recorded or dynamically generated alerts, but a clear and audible fire alarm alert is crucial.