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Identifiers on P25?

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SlipNutz15

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#1
Identifiers on digital conventional/P25?

My county is switching to a digital radio system (non-trunked) and I was wondering how the county would know who is transmitting. Does P25 have identifiers (PTTID) like MDC1200 or is there something else that digital radios do that the console automatically knows what radio transmitted?

The reason I'm asking is because unfortunately the 911 director doesn't have answers and the communications company that got the bid I feel is a little shady and isn't answering all our questions.

Any help is appreciated.
 
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Thunderknight

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#2
Yes. P25 individual unit identifiers. How that would be presented to a console is console dependent (eg alias table), but most subscriber radios I have seen will show the number right on the screen while receiving.
 

SlipNutz15

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#3
Now on a conventional system does the user have to wait for a "go ahead" signal like when an MDC1200 wait tone or is the ID transmitted while the voice is transmitting?
 
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