There is certainly a way to do this, though VOIP, while an option, you will 
have issues if there are outages.  Of course, there can be outages of all 
types, that will effect everything, no matter what you set up.

I am familiar with a large organization that operates just like you would like 
to.  They have multiple dispatch locations.  The phones are not 911 phones.  
This is a private, volunteer organization, and they have three emergency phone 
numbers.  Each location has 3 phone lines (and numbers, I think all different, 
but you can check with your local POTS to see if you can have several phone 
lines with the same "emergency" numbers) They use POTS.  All lines roll over to 
the next if the line is busy.  When a new dispatcher comes on shift, they "pull 
the lines", essentially, they dial the phone company number, and enter 
code/codes to have the calls forwarded to the dispatchers location phones.

As for dispatching, that really depends on many factors, at least in my mind it 
does.  What type of system are you using, repeater, simplex.  You may even be 
able to use a tone remote over a POTS line to the radio system.  Will you be 
paging units, and if so, what units?  Do your firefighters carry plectrons or 
two way radios?  How will/do you initate a call out?

There are a lot of unknowns in your post.  

Now adays, while there is some difference of opinion regarding the technology 
and radios, MOTOTRBO might be a choice for a system.  There are dispatching 
softwares that utilize a mobile/base radio to control the system and the 
individual units.  And, you can have a data/command time slot, and an emergency 
time slot, in a single frequency (assuming you have/can get a frequency)

Michael

--- In Repeater-Builder@yahoogroups.com, "Jed Barton" <j...@...> wrote:
>
> Hey guys,
> I am working on a project and am wondering if anyone has done this.
> Here's the proposal, to setup a dispatch center for an FD, where the
> dispatchers can sit at home and work the entire thing.
> This is not a very busy department, that's why they thought it would be good
> to do it.
> I've done a lot of research, and it can certainly be done.
> This obviously brings up a lot of debate for a number of reasons.  In
> looking at it though, the relyability of the net is very good compared to a
> verizon phone line.
> Curious if anyone has done something like this before.
> For the phone system, we'reusing a virtual phone system that has proven
> relyability.
> 
> Thanks,
> Jed
>


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