Grandstream GXW-4104 - doesn't path through the early media


Hello All,

I have an issue on outbound calls to a special service providers, where the audio is transferred before the call is established.
Besides of that issue I also can’t hear original ring tone from the analogue line when I do any outbound calls. It looks like early media is not passing through.
Does somebody know how to enable it in 3CX on SIP trunk config for GXW-4104 or directly in GXW-4104 ?

Thank you in advance!