Hi,

We install a 8ML product, on the lan network this product work fine but we have a remote office with a branch office VPN configured by two pfsense router, the remote phone can be provisione, ring and can listen the internal phone on the main office but can't speak and no bidirectionnal sound with the external line ( fxo ).

On my routers I implant rules any protocol can pass but only audio data can'T pass