On Fri, 24 Feb 2006 [EMAIL PROTECTED] wrote:
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?
#1) Liability for a claim that a 911 call didn't go through.
If you're the manager for a 911 center, do you want to be the one who OK'd
the change to the network?
#2) What's the benefit to the city/county/911 center? Who pays for it?
What protections from attack do you provide? Can you choke a large volume of
calls? (Choke = throttle down call rates = busy some callers)
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.
The voice communications lines do not deliver the location data. Those are
additional circuits back to a database provider. Often a 56K or 64K DDS line
(a pair of them for redundancy)
Google provided this link for a picture of how this works.
http://www.redskytech.com/e911_Center/how_works/
Personally, I'd like to talk to some SS7 experts who understand the E2 or V2
(as modified for VoIP) links, about what would be required to build a MPC
(mobile positioning center). I understand this is how the Cellular guys send
their location updates in realtime.
Cellular caller dials 911, cell site sector is used to find a trunk to a
local PSAP. Psuedo ANI is sent to the PSAP with the call. PSAP system knows
from the Psuedo ANI which MPC to query for a location. As soon as call is
answered, PSAP 'rebids' the database and has the location. PSAP can 'rebid'
the MPC any time during the call (In most cases) to get location updates.
(Following a moving 911 caller for example)
Something for us all to keep in mind, The PSAP operators are all feeling
money pains. The network is getting more expensive to operate, taxes are
being cut throughout the U.S.A. Fewer POTS lines are being installed. More
operators of 'communications services' are comming online all the time.
Someone's gotta buy those ports into their phone switches. Are you paying
into the 911 network to the people who answer the calls?
Most states charge a fee to telephone end users to pay for the network. Most
VoIP or Cellular operators are not paying into the state funds to pay for
services. There are serious funding issues for 911 these days. The solution
being worked on is per number taxes at the federal level, but that creates
new problems. The voicemail, pageing, answering service providers, they don't
think this is fair. What about the large business with 100 lines, many they
only need a single DID number? Would they keep all their lines if costs
changed. What about the VoIP provider who buys 1000 blocks of numbers from
CLEC's but haven't assigned those numbers to customers? Should they be taxed?
OK, and now my point. How can we get to the i3 version of the 911 center of
the future with no money to pay for it?
MESSAGE TO THE FCC and CONGRESS? Little help here, PLEASE!
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