[QUOTE=Is this a bug or am I missing something?[/QUOTE]
I have had to check this out! The option 'Disable broadcast reception' has a number of effects. Its is primarily designed more as a 'Do not disturb' option. That is obviously not to receive broadcast annunciations of speech and sounds. However it also stops local instigated speech and sounds (so as not to disturb). When enabled it also blocks reception of intercom broadcasts sessions although the user can join an intercom session if they 'heard' one was taking place by pressing their intercom button. Even when checked it does allow intercom sessions instigated from the panel. Perhaps we should rename it to 'Do not disturb'.
So this option behaves this way on all intercoms and is no different for the AUI intercom.
If you have turned on Disable broadcast reception for the AUI intercom because you do not want normal internal house conversations, speech messages and sound prompts to be heard on the AUI then this is not nessessary. This is because when a broadcast sound message is activated the 'All Intercom' object enables all the intercom speakers on the system. It does this with a network broadcast packet targetting specific Intercom types (TID=61). This allows all required intercoms to change state at the same time with a single message. The AUI intercom belongs to a type ID of 62 so will not be switched on/off. The AUI intercom icon may still show it becoming active under these circumstances.
Viv.