One Way Audio or no Audio? Try STUN server setting

If you are having issues with one way audio or no audio coming though this can often be as a result of network routing for the call audio (sometimes called NAT issues with media routing)

To resolve this most VoIP SIP clients (software and hardware) have a setting called STUN server. STUN stands for Session Traversal Utilities for NAT. By using a STUN server it helps the client negotiate the correct route with the VoIP server for the call audio.

Irish VoIP has its own STUN server which can be used for this purpose. Its address is and it uses the default port for STUN 3478

Implementing a SIP Proxy will also remove issues with NAT as the SIP Proxy has inbuilt NAT resolution techniques that are more robust than the Cloud PBX directly.

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