8 thoughts on - Geolocation/E911

• What are you talking about exactly?

  What I have understand, E911 geo information is sent “out of band” when 911 is called.

  So the question is, is you operating a 911 call centre – then you should have this information at hand already how to access this information.

  Or are it the opposite, you want to send geocoded information about SIP handset location to a E911 service when 911 is called? (that you want to embed in the outgoing body when 911 is called)?

  I think gaining access to these types of E911 API’s requires you being a SIP operator – and if you are a SIP operator with a number plan already, you should already have access to these types of API from the beginning and how to use them.

  Från: asterisk-users-bounces@lists.digium.com För Dan Cropp Skickat: den 23 maj 2022 22:01
  Till: Asterisk Users Mailing List – Non-Commercial Discussion
  Ämne: [asterisk-users] Geolocation/E911

  Out of curiosity, is there any documentation on what is planned for the Geolocation/E911?

  Is the plan for Asterisk to expose the SIP body and leave it to dial plan, ARI, AMI to process the data?

  For example, mime pidf+xml section?

  Or is there a different approach being worked on (or planned to be worked on)?

  Dan

• There is a review up on Gerrit[1] with the documentation in markdown. There’s also a branch in Gerrit with the work. We are planning to do interop testing, so it hasn’t been merged into main and may change.

  No. It will be modules for Geolocation/E911 that understand the XML, with configuration as well as by reference. The PIDF+XML won’t be exposed, the code handles it. You create profiles and tell the PJSIP endpoint to use it, and that’s that. Can also be dynamically done in the dialplan.

• Whoops, review is at https://gerrit.asterisk.org/c/asterisk/+/18360

• There are specifications for conveying location information dynamically in the SIP INVITE to an upstream provider, which uses pidf+xml alongside SDP
  in the INVITE. This allows you to provide the address, floor, room, longitude/latitude dynamically with the call. You can see what it looks like on the Bandwidth site[1]. It is a standard though, not specific to them.

  [1]
  https://support.bandwidth.com/hc/en-us/articles/360006080074-E911-Dynamic-Location-Routing-integration-and-testing-guide

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• Both directions will be supported according to the specification and standard. The information will be accessible from the dialplan using a dialplan function, but not the pidf+xml itself. If they’re doing something outside of the standard, then it likely wouldn’t work. The code is not written for 911 PSAPs/handlers specifically, it’s written for receiving the information from an endpoint, and for sending it out.

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