Implementing an Emergency Telecommunications Service for Real- Time Services in the Internet Protocol Suite
RFC 4542, “Implementing an Emergency Telecommunications Service for Real- Time Services in the Internet Protocol Suite”, is an Informational document published in May 2006 by F. Baker, J. Polk. It has since been updated by RFC 5865. The canonical text is published by the RFC Editor.
Abstract
RFCs 3689 and 3690 detail requirements for an Emergency Telecommunications Service (ETS), of which an Internet Emergency Preparedness Service (IEPS) would be a part. Some of these types of services require call preemption; others require call queuing or other mechanisms. IEPS requires a Call Admission Control (CAC) procedure and a Per Hop Behavior (PHB) for the data that meet the needs of this architecture. Such a CAC procedure and PHB is appropriate to any service that might use H.323 or SIP to set up real-time sessions. The key requirement is to guarantee an elevated probability of call completion to an authorized user in time of crisis.
This document primarily discusses supporting ETS in the context of the US Government and NATO, because it focuses on the Multi-Level Precedence and Preemption (MLPP) and Government Emergency Telecommunication Service (GETS) standards. The architectures described here are applicable beyond these organizations. This memo provides information for the Internet community.
What “Informational” means
Published for the general information of the community. It does not define an IETF standard and carries no standards-track status.
The canonical text of RFC 4542 is hosted at rfc-editor.org. Available in TXT,HTML.
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