[Asterisk-Users] Using asterisk for a 911 call center....

[Daryl Jones]

911 trunks are usually delivered to public-safety answering points (PSAP) on
analog reverse-battery facilities. (The PSAP provides battery toward the CO).
ANI is provided using MF tones. The PSAP equipment must take the ANI and use it
to submit a database query to lookup the caller's address (ALI - automatic
location identification) to an external database that is usually operated
by the ILEC or its contractor. The ANI and ALI information must be presented
to the 911 call taker immediately upon answering the call.

There is definitely a place for Asterisk in the public-safety telecomm
field, but a lot of work would be needed for it to handle calls in a PSAP.

If you're interested in learning more about PSAP equipment, take a look at
the web pages for Plant Equipment, Inc,  Positron, Inc. and Zetron, Inc.


On Mon, 21 Jul 2003, Gene Kochanowsky wrote:

> Has anyone had any experience using asterisk for a 911 call center? Does anyone know of any reason why it would not be suitable? As far as I know all 911 call routing takes place at the CO switch so a regular T1 line should work fine. I understand that there is support for ACD in asterisk and that is should be possible to implement screen pop (CTI). Any comments?
>