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12.4 Priority Manager Conguration
Each zone microphone, reman microphone or audio input available in the system must have its priority dened in order to ensure
correct operation, as intended for sound emergency systems.
21.
1
Message priority mode in case of conict – FIFO / LIFO
Priority Resolve Mode this is a global system function which denes the system’s behaviour in case a conict occurs.
Theconict being a simultaneous transmission to the speaker zone from two or more audio sources of the same priority.
For FIFO (First in rst out) in the case when Source 1 of Priority X is transmitting to Output Y and after some time Source 2
of Priority X wants to transmit to Output Y too, Source 2 can not transmit until Source 1 has nished transmitting to Output Y.
For LIFO (Last in rst out) in the case when Source 1 of Priority X is transmitting on Output Y (speaker zone) and, after some
time, Source 2 of Priority X will start transmitting on Output Y (speaker zone) too, then Source 2 will replace Source 1, as
transmitting, and will commence transmitting to Output Y.
Priority Resolve Mode also determines the method of dynamic assignment of a backup power amplier in case a failure
occurs of the amplier modules which are responsible for transmission of simultaneous messages of the same priorities.
Incase two equally prioritized messages are executed to various zones, Message 1 of Priority (100), Message 2 of Priority (100)
too, which was matriced after Message 1 – when an amplier module failure occurs for the FIFO mode: the amplier which
supplies Message 1 will not be taken over by Message 2 until Message 1 (matrix) has been completed; for LIFO – theMessage
1 amplier module will be disconnected and assigned as a backup amplier for Message 2.