I am linking a 3CX to a FreePBX using bridging from 3CX as outlined in this guide;
Calls placed from the 3CX to the Asterisk give a “403 forbidden” from the Asterisk IP address and the Asterisk reports;
“sip rtp tos bits 184
sip rtp cos mark 5”
Calls placed from the Asterisk to 3CX establish and function correctly.
Any thoughts are greatly appreciated.