Jed;
What you ask is more of a legal issue than technical. There are
several products built to transport voice/radio over IP and at least 2
have been mentioned in this thread.. But.. before you start buying
equipment I think you need to deal with the legal and liability issues..
this has nothing to do with technical.. it has to do with state and/or
federal laws.. In my state a 911 call center has to be manned full time
24x7 and cannot be "switched" from one center to another ( or in your
case dispatchers houses) . It is just not permitted... I am assuming
most states have similar laws.. actually routing the call is not the
issue... If you cannot comply with the 24x7x365 from a manned single
point.. I do not think you can run a 911 PSAP dispatch center.. I am not
talking about switching for backups.. I am talking about switching for
shift coverage or day/night type scenarios. Now ... if your County Seat
( Sheriffs Office etc..) handles 911 calls and all you want to do is
deal with non emergency and voice dispatch of non essential traffic..
that is another matter...
There are VOIP and ROIP solutions for remote controlling radios.
There are Wireless Consoles on IP based systems.. Almost ALL Public
Safety IP based linking system that I have ever seen have a requirement
of a finite fixed or controlled latency which as mentioned by others
means a private network, or private within a public network or some
equivalent Service Level Agreement that will make sure it will be..
There are commercial applications of ROIP such as
<http://www.xelatec.com/xippr/products> who offer software and hardware
to remote control transceivers.. These are business class solutions but
are well established.. They have plenty of roots in amateur linking as
well as commercial systems... it is largely based on Asterisk PBX.
Another product group of hardware is referred to TDM over IP.. these
systems create framed T1's etc over IP backhaul ( private or private
over public networks) but latency and jitter must be controlled..
anything from 4 wire E&M over IP to 56k and up to T1 or even multi T1.
IDA Corporation also makes Radio over IP control hardware.. I do
have recent experience with those products.. and I can also say that
product group seems to be in at least one major manufacturer's IP based
desktop Control Station radio hardware.. supporting IP based remotes or
standard dc or tone remotes...
Doug
KD8B
Jed Barton wrote:
>
>
> the phone system we're thinking of going with is a system called ring
> central.
> It's a system i am very familiar with, and have a ton of experience with.
> Curious if you have done the VOIP thing before in a dispatch environment.
>
> -----Original Message-----
> From: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> [mailto:[email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>] On Behalf Of Doug Bade
> Sent: Monday, January 04, 2010 4:23 PM
> To: [email protected]
> <mailto:Repeater-Builder%40yahoogroups.com>
> Subject: Re: [Repeater-Builder] dispatch centers run through the internet
>
> Jed;
> There are certainly options to pass radio audio and keying over the
> internet in VOIP or equivalent scenarios. I would also mention there are
> several agencies who have regulations on how calls are answered and
> dispatched... Your solution would seem to require some approvals if
> involves
> 911.. A "cheap and dirty" IP based solution may not meet the legal
> requirements and implied service requirements of your municipals insurance
> company. I would think you need to verify it is legal to do what you want
> let alone insured... then find a solution that satisfies those parties...
>
> Doug
> KD8B
>
> At 04:03 PM 1/4/2010, you wrote:
>
>
>
