The emergency services architecture developed in the IETF Emergency
Context Resolution with Internet Technology (ECRIT) working group
describes an architecture where location information is provided by
access networks to endpoints or Voice over IP (VoIP) service
providers in order to determine the correct dial string and
information to route the call to a Public Safety Answering Point
(PSAP). To determine the PSAP Uniform Resource Identifier (URI), the
usage of the Location-to-Service Translation (LoST) protocol is
This document provides a problem statement and lists requirements for
situations where the Internet Access Provider (IAP) and/or the
Internet Service Provider (ISP) are only willing to disclose limited
or no location information. This document is not an Internet Standards
Track specification; it is published for informational purposes.
This document is a product of the Emergency Context Resolution with Internet Technologies Working Group of the IETF.
INFORMATIONAL: This memo provides information for the Internet community.
It does not specify an Internet standard of any kind. Distribution of
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