I'm looking for a reference to cite that states FD dispatches must be transmitted over the main dispatch channel, not just an (separate) alerting path. I think I've seen it before, but cannot locate it. I've looked through NFPA 1221- closest I can find is section 9.1.1.7 and 9.1.1.7.1 which states "events shall be retransmitted to units in the field from the location events are received". I think this is a little ambiguous and it would help if I had something a little more solid.
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Dispatching over main channel when separate alerting system is used
- Thread starter ffexpCP
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ka3aaa
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what year or edition of nfpa 1221.
RFI-EMI-GUY
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It is a redundancy method.
In the past wasn't this part of the ISO rating ? I recall working in a city that was alerted multiple ways all at the same time. Over air on TRS, over air on VHF, over air on VHF BU channel and a CAD Rip-Run system. On top of it all duty crews carried a pager and got alerts via cell phone.
Mr_Boh
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Yes it's an ISO thing - it's more about the redundancy where the toning would be secondary to an IP system. They want a backup so if you have IP based alerting, you could say, use Quik Call over a simulcast to also alert the station.
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