[asterisk-users] Can I roll my own E911?

[Alex Balashov]

Adam Moffett wrote:

> Assuming I only operate in one municipality (I do), and assuming I made 
> some sort of connection to the emergency services center in this area, 
> via SIP or a T1 or whatever

PSAPs won't do VoIP.  In fact, they won't do anything like PRI;  for the 
most part, T1s to PSAPs are some type of E&M / FGB / FGD.

I am also not sure that you can actually get an access circuit to a 
PSAP.  It may be that the only way to reach one is through 911 TCICs in 
an SS7 interconnection IMT.  Of course, all these E911 companies have to 
be able to dump calls into PSAPs somehow, but they probably ride the 
services of some nationwide CLEC in order to do it.

> does asterisk have a way for me to send the E911 address data?

Asterisk does not have an ALI interface as far as I know.  But it is 
possible to patch the call through various appliances that do.

-- 
Alex Balashov
Evariste Systems
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