[SIPForum-techwg] FW: SIPConnect Emergency Text

[Henning Schulzrinne]

This doesn't seem to agree with the ECRIT WG architecture and BCP.

Henning

On Sep 26, 2008, at 12:26 PM, Richard Shockey wrote:

> Shit
>
> Sorry
>
> Here it is:
> While not explicitly required by this interface specification, it is  
> RECOMMENDED that the Service Provider support emergency services  
> calls for one or more fixed physical locations serviced by the  
> Enterprise Network. In some jurisdictions, a special e164 number is  
> designated for use as a key in a database that stores precise  
> location information.  This number, which can be non-dialable, is  
> provided to the emergency system to determine routing and dispatch.   
> Where such numbers are needed, for each such physical location, the  
> Enterprise and Service Provider SHOULD mutually agree upon an E.164  
> number that will be used when an emergency services call is made  
> from that location[JRE1]  . This E.164 number SHOULD included in the  
> INVITE.
>
> The PBX SHOULD format the ‘Request-URI’ field as follows when an  
> emergency services call is made:
>
> INVITE  <sip:[Country-specific emergency services address];phone- 
> context=[Predetermined Geographic E.164 Address]@[Service Provider  
> Domain Name] ;user=phone> SIP/2.0
>
> The actual telephone number of the caller is provided as described  
> in Section 15.6.1. The country-specific emergency services address  
> is defined as the dial string used in the country of origin to  
> request emergency services. Where a special e.164 number is needed,  
> the phone-context parameter SHOULD contain a valid E.164 address  
> previously agreed upon by the Enterprise and Service Provider to  
> represent the physical location from which the call originated. The  
> Service Provider SHOULD ensure that valid location information for  
> this E.164 address is provisioned in the emergency services database.
>
> For example, an emergency services call originating in the United  
> States with a special E.164 number of +16789901234 would be  
> formatted as follows:
>
> To: <sip:911;phone-context= 
> +16789901234 at serviceprovider.net;user=phone>
>
>
>   Earlier it said that the sos URN would be used.
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