Howto:Facility Interworking
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During call transfer without consultation, the PBX does not play MOH to the transferred party.
The PBX sends a "REMOTE-HOLD" to the transferred party instead.
This "REMOTE-HOLD" needs to be interworked on the Gateway (H323->SIP or H323->QSIG).
To enable facility interworking, activate "Interworking(QSIG,SIP)" on the gateway routes for incoming and outgoing calls.
In SIP a reINVITE with "a:inactive" is going to be sent for "REMOTE-HOLD".