I have a MyPBX SOHO and doing some testing with SIP.
I noticed when I call a device and the device rejects the call.
A 486 busy will be send to the PBX, but never will be forwarded to the other device.
The other device gets a 200 OK followed by a RTP stream for the voicemail and the device has to hangup itself.
Is there a possibility to forward the 486 message to the device and disable the voicemail functionality?