Glad to know it.
If 3CX to 3CX call still makes 2 SIP sessions over the Brekeke SIP Server, it means two RTP streams are made because each route has $rtp=true.
If you tune DialPlan rules to use a single SIP session like 3CX-to-upstream provider, you can save SIP server and router's resources.
No Audio Between PBXs that are connected to BSS.
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