You really need an outside company to implement e911 for you. Your idea of putting each phone in a separate context might work if;
You have a local emergency number for every caller in your dial plan. You have maps that show the jurisdiction of every 911 dispatcher in your service area. You confirm the numbers on a case by case basis. Every agency you deal with as a local number for emergencies. The bottom line is that every number you assign to subscribers still has to have a record in the PSAP database for address information to be transmitted, so you will still need a relationship with a PSAP data manager. Bottom line, too complex and too much liability, you need outside help. This is a huge issue right now and companies like intrado (www.intrado.com) are working on it. Find out who manages the PSAP database for your intended service area and contact them to see if they have a VoIP e911 service available. This issue also impacts cellular systems, but it is easier because each cell site typically only covers one or two jurisdictions, in which case the caller gets "close enough" to the right agency based on the cell site they are connected to and due to the mobile nature of the systems address information is not expected to be transmitted. Newer solutions for cellular include GPS location information in the call. The handset receives GPS info and distance info from each cell site it can "hear". Simple math on the handset adjusts the GPS location based on triangulation of the last three known GPS coords (cell sites) > -----Original Message----- > From: [EMAIL PROTECTED] [mailto:asterisk-users- > [EMAIL PROTECTED] On Behalf Of Matt > Sent: Saturday, March 19, 2005 9:02 AM > To: Asterisk Users Mailing List - Non-Commercial Discussion > Subject: [Asterisk-Users] Routing 911 calls > > Has anyone used asterisk as a simple voip server? (I'm sure its been/ing > done). > If so... how did you provide 911 service? Did you setup different > contexts and put sip phones in those contexts per county? > > Also, is it possible to put a phone into multiple contexts? > > For instance: > > context=from-internal > > Can I add a second context like with a , comma? So the phone can have > the rules from 2 contexts? How would I do that? > _______________________________________________ > Asterisk-Users mailing list > Asterisk-Users@lists.digium.com > http://lists.digium.com/mailman/listinfo/asterisk-users > To UNSUBSCRIBE or update options visit: > http://lists.digium.com/mailman/listinfo/asterisk-users _______________________________________________ Asterisk-Users mailing list Asterisk-Users@lists.digium.com http://lists.digium.com/mailman/listinfo/asterisk-users To UNSUBSCRIBE or update options visit: http://lists.digium.com/mailman/listinfo/asterisk-users