The emergency caller indicates that the intended recipient of the communication is the Service URN (e.g., urn:service.sos in the US since there is no differentiation between the individual services). Hence, the retransmission-allowed attribute would allow you to consume location between the respective PSAPs. The case would be different if the call is specifically targeted to urn:service.sos.police.
This is the technical side and I am sure there are folks who would disagree with my view since this intented recipient story never got well document in the SIP location conveyance document (see http://tools.ietf.org/html/draft-ietf-sipcore-location-conveyance-01).
From the legal side emergency services in most jurisdictions you are allowed to share location information with the other PSAPs. I have to dig out some regulatory text to support that statement. However, there are complications as well. Example: PSAPs being in different countries. Then, there are restrictions since you cannot use location information, caller-id, medical records, etc. for whatever you like.
Ciao
Hannes
PS: Please note that there are differences between location and caller-id information as well (from a technical and legal point of view).
>-----Original Message-----
>From: geopriv-bounces@ietf.org
>[mailto:geopriv-bounces@ietf.org] On Behalf Of ext Dan Mongrain
>Sent: 17 September, 2009 19:01
>To: GEOPRIV
>Subject: [Geopriv] Question regarding <retransmission-allowed>
>and calltransfers
>
>I have just read RFC 5606 regarding using
><retransmission-allowed> and have a question when used in an
>emergency calling situation.
>
>An emergency call is made and the PSAP answering the call is
>operated by the police department. It is determined that
>police, fire and ambulance are required to be dispatched. The
>fire department and the ambulance company can be deemed as
>separate parties from the police department (the ambulance
>company can be a private company).
>
>1. If the <retransmission-allowed> flag is set to no, is
>forwarding the PIDF-LO onto both fire and ambulance a breach
>of the use of the flag?
>2. The RFC implies that the LR must respect the flag only if
>it has a legal obligation to do so. Can it be assume that
>because a caller has no reasonable expectation to privacy when
>making an emergency call (at least in North America) then
>forwarding of the PIDF-LO is allowed?
>
>Thanx,
>
>Dan Mongrain, ing.
>Ingénieur système
>Systems Engineer
>
>dmongrain@plantcml.com
>
>75 boul. de la Technologie
>Gatineau, QC J8Z 3G4
>OFFICE 819.778.2053
>DIRECT 819.776.7906
>FAX 819.772.8905
>MOBILE 819.712.0491
>www.plantcml.com
>
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