Author Topic: Comm truck (601?) call?  (Read 1326 times)

Offline lifeguard91

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Comm truck (601?) call?
« on: October 04, 2010, 02:01:27 PM »
I heard around 13:50 dispatch raised a comm truck and read some kinda voting results. For example, Group 1, # of votes, 1,###,###. this was for 3 groups. Anyone know what that was about?

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Comm truck (601?) call?
« on: October 04, 2010, 02:01:27 PM »

Offline catry

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Re: Comm truck (601?) call?
« Reply #1 on: October 04, 2010, 02:54:53 PM »
Number of volts in an ERS box circuit...

Offline FDNY150

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Re: Comm truck (601?) call?
« Reply #2 on: October 04, 2010, 05:21:08 PM »
I think you mean loops. ERS loops(the circuits on which the boxes are on. Called loops to differentiate from Circuits that the pull boxes are on) have to have a certain voltage and amperage to operate. They are usually 100 volts, 150 milliamps. 601 is the foreman. I presume he was out working with his crews to trouble shoot a few loops in a particular feeder cable. If you hear a loop or circuit is open, that means there is a break somewhere and the loop is not getting the electricity it needs. If you hear shunted, it means the loop or circuit is getting electricity, just an insufficient amount.

If you hear us place battery on a loop, or a ground, we have grounded one side of the loop to try to close an open loop(circuit). We can either ground out the negative side(also called positive battery) or the positive side(negative battery). Grounding out the loop(circuit) allows alarm boxes to still come in on one side of the break so we don't completely lose alarmbox coverage. It also allows the electrician to better find the break in the circuit to repair it. There's a lot more to being an FDNY Fire Alarm Dispatcher than just telling the guys in the rigs where to go.
Step up or Shut up!!!

Offline lifeguard91

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Re: Comm truck (601?) call?
« Reply #3 on: October 04, 2010, 06:21:00 PM »
 :o wow... thank you so much. =)

Offline BronxFireRadio

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Re: Comm truck (601?) call?
« Reply #4 on: October 04, 2010, 07:25:12 PM »
And not to be confused with Volts or ERS loops, there is actually a term in radio communications called "voting".
Basically, receivers throughout each boro (usually around 5 per boro, and usually stationed atop tall buildings) listen for FDNY units in the field to transmit on the input frequency and relays the audio signal via wire to the CO. A radio device called a voter decides which signal is the strongest (most likely the receiver closest to the transmitting unit) and broadcasts that signal audibly at the dispatcher's radio console.

Offline FDNY150

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Re: Comm truck (601?) call?
« Reply #5 on: October 07, 2010, 03:32:39 PM »
Yes, my friend. But, I don't think we'd be talking to 601 for that. Most of that conversation would be with the Radio Mechanic, and be done over the phone.
Step up or Shut up!!!