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Question? About P25 TRS

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SCPD

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If my city only has three frequencies for the statewide digital trunking system... if there are three different agencies transmitting... if a fourth user tries to TX will they get an error beep? Thanks.
 

nd5y

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If my city only has three frequencies for the statewide digital trunking system... if there are three different agencies transmitting... if a fourth user tries to TX will they get an error beep? Thanks.

Correct except if the site has three frequencies then one is the control channel and two are voice channels so only two talkgroups can be active at the same time.
 

Thunderknight

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If my city only has three frequencies for the statewide digital trunking system... if there are three different agencies transmitting... if a fourth user tries to TX will they get an error beep? Thanks.

Can you specify which system/city?

I'm confused as to why they would have 3 frequencies for the "statewide" system. You sure that's not 3 talkgroups?
Or, are they partitioned off from the rest of the statewide system? Or is there only 1 site that serves your city? Are you sure those are 3 total channels, or just 3 possible control channels?
If it's P25 phase 2 it would double the number of talkpaths on the voice channels.
 

SCPD

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Can you specify which system/city?

I'm confused as to why they would have 3 frequencies for the "statewide" system. You sure that's not 3 talkgroups?
Or, are they partitioned off from the rest of the statewide system? Or is there only 1 site that serves your city? Are you sure those are 3 total channels, or just 3 possible control channels?
If it's P25 phase 2 it would double the number of talkpaths on the voice channels.

Sorry, I meant site.
 

krokus

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With MPSCS, the last user gets a "bonk" tone, as does anyone else in the state that is on a talkgroup that is their primary selection on that tower.

I would guess that all, or most, SmartZone systems are like that.
 

gesucks

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With MPSCS, the last user gets a "bonk" tone, as does anyone else in the state that is on a talkgroup that is their primary selection on that tower.

I would guess that all, or most, SmartZone systems are like that.

It depends if the talkgroup is set for allstart or fast start
 

greenthumb

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Fast start and all start only matter when the busy is at another site participating in the talk group call. If the originating site is busy, the configuration of the talk group with respect to those parameters doesn't matter, it just goes into the busy queue.
 

SCPD

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Here's a twist. If the system is P2, the two voice frequencies support four talk paths so the fourth party key-up would not get a busy tone.
 
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