On Fri, 2006-02-24 at 00:06 -0700, Matt Larsen - Lists wrote: > Has anyone on this list considered bypassing the PSAP system and putting > in an Internet-based replacement at the local communication center to > provide e911 information for VOIP callers? > > For example.... > > I provide the internet connection for several of the communication > centers responsible for handling 911 calls in my area. Why couldn't I > put in a box either right next to, or directly in front of their PSAP > connection that receives and reports the 911 information through the > Internet from my Asterisk box when someone dials 911? > > I can't help but think that this would be a trivial piece of programming > to come up with. Need to add database records for the customer address > on the Asterisk box, and some kind of dial plan that reported the > customer information to the remote end of the 911 system when someone > dials. PSAP T1s are just T1s, I'm guessing it would be fairly simple to > format the information coming from the remote 911 box to look like a > regular PSAP T1 as it goes into the Communication Center box. > As I understand it the data sent over those T1s are specific to PSAP applications, as such its not just a normal T1 stack that would work. You could get the audio but to get the address information you need to know the format the data is in so it can be interpreted or in the case of sending, properly generated.
> Is anyone doing this? If not, why? > There was a new voip e911 spec that was agreed upon late last year. As the spec was only recently agreed upon no one afaik has yet implemented it, but that should start to happen sometime soon. The PSAPs obviously have to buy into this technology, and an FCC mandate would go a long way towards this regard. Another potential problem is how secure is the internet? Do you really want a publicly accessable server on the internet that deals with this? Not just for hostile actions from foreign entities, but potentially domestic ones as well. Everything from the kid who thinks it would be funny to cause the cops to show up at someones house at 3am and order everyone on the floor until they sort out what is going on to theives trying to ensure that 911 cant be called when they do a robbery. And if you dont believe kids are already getting SWAT or other similar types of responses from police, you are mistaken, often by using what is called a '911 backdoor' (in reality its the direct number to the PSAP) no address info or ANI is normally sent, and they will give an address scream and hangup. The cops dont know what is going on so they show up in force waking everyone up and forcing them on the floor at gunpoint until they can determine what is actually going on. Try going back to sleep after that. There are some serious issues that need to be resolved before this gets implemented and I am not sure that the spec addresses any of these issues as they are more implementation issues rather than 'protocol' issues. -- Trixter http://www.0xdecafbad.com Bret McDanel UK +44 870 340 4605 Germany +49 801 777 555 3402 US +1 360 207 0479 or +1 516 687 5200 FreeWorldDialup: 635378 http://www.sacaug.org/ Sacramento Asterisk Users Group
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