Hi,
Probably Exchange A sends ACM with field In_band_information_available which means that announcement is connected and then REL with some Cause_Value.And Exchange B reacts on Cause_Value by playing announcement.
As ussual the last exchange must play the announcement. You can remove the play_tone flag in the trunk configuration to play the announcement at exchange B.That is the trunk connected between Exchange A and B.
Abdel
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