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authorThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
committerThomas Voss <mail@thomasvoss.com> 2024-11-27 20:54:24 +0100
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+Network Working Group M. Tuexen
+Request for Comments: 5133 Muenster Univ. of Applied Sciences
+Updates: 4233 K. Morneault
+Category: Standards Track Cisco Systems, Inc.
+ December 2007
+
+
+ Terminal Endpoint Identifier (TEI) Query Request Number Change
+
+Status of This Memo
+
+ This document specifies an Internet standards track protocol for the
+ Internet community, and requests discussion and suggestions for
+ improvements. Please refer to the current edition of the "Internet
+ Official Protocol Standards" (STD 1) for the standardization state
+ and status of this protocol. Distribution of this memo is unlimited.
+
+Abstract
+
+ The Integrated Services Digital Network (ISDN) Q.921-User Adaptation
+ Layer (IUA) Protocol, described in RFC 4233, defines the message type
+ of Terminal Endpoint Identifier (TEI) Query Request messages as 5.
+ However, this number is already being used by the Digital Private
+ Network Signaling System (DPNSS)/Digital Access Signaling System 2
+ (DASS 2) Extensions (DUA) to the IUA Protocol described in RFC 4129.
+ This document updates RFC 4233 such that the message type of TEI
+ Query Request messages is 8.
+
+Table of Contents
+
+ 1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 2
+ 2. Conventions Used in This Document . . . . . . . . . . . . . . . 2
+ 3. New Message Type of the TEI Query Message . . . . . . . . . . . 2
+ 4. IANA Considerations . . . . . . . . . . . . . . . . . . . . . . 2
+ 5. Security Considerations . . . . . . . . . . . . . . . . . . . . 2
+ 6. Acknowledgments . . . . . . . . . . . . . . . . . . . . . . . . 2
+ 7. Normative References . . . . . . . . . . . . . . . . . . . . . 3
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+Tuexen & Morneault Standards Track [Page 1]
+
+RFC 5133 TEI Query Request Number Change December 2007
+
+
+1. Introduction
+
+ The Integrated Services Digital Network (ISDN) Q.921-User Adaptation
+ Layer (IUA) protocol, described in [RFC3057], does not define a
+ Terminal Endpoint Identifier (TEI) Query Request message. The
+ Digital Private Network Signaling System (DPNSS)/Digital Access
+ Signaling System 2 (DASS 2) Extensions (DUA) to the IUA Protocol,
+ described in [RFC4129], introduces Data Link Connection (DLC) Status
+ messages of type 5, 6, and 7. Then, [RFC4233] was published, which
+ updates [RFC3057]. [RFC4233] also introduces the TEI Query Request
+ message and uses the message type of 5 for it. This makes it
+ impossible to differentiate the DLC Status request from a TEI Query
+ Request.
+
+ This document updates [RFC4233].
+
+2. Conventions Used in This Document
+
+ The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
+ "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
+ document are to be interpreted as described in [RFC2119].
+
+3. New Message Type of the TEI Query Message
+
+ This document updates [RFC4233] by introducing the following change:
+
+ Terminal Endpoint Identifier (TEI) Query messages MUST be encoded
+ with a message type of 8 instead of 5 as described in [RFC4233].
+
+4. IANA Considerations
+
+ In the "Message Types" section of the "Signaling User Adaptation
+ Layer Assignments" registry, IANA has reserved the message type 8 of
+ Management Messages for Terminal Endpoint Identifier (TEI) Query
+ Request messages.
+
+5. Security Considerations
+
+ This document does not require any security considerations in
+ addition to the ones given in [RFC4233].
+
+6. Acknowledgments
+
+ The authors wish to thank Jon Peterson and Christian Vogt for their
+ invaluable comments.
+
+
+
+
+
+
+Tuexen & Morneault Standards Track [Page 2]
+
+RFC 5133 TEI Query Request Number Change December 2007
+
+
+7. Normative References
+
+ [RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
+ Requirement Levels", BCP 14, RFC 2119, March 1997.
+
+ [RFC3057] Morneault, K., Rengasami, S., Kalla, M., and G.
+ Sidebottom, "ISDN Q.921-User Adaptation Layer", RFC 3057,
+ February 2001.
+
+ [RFC4129] Mukundan, R., Morneault, K., and N. Mangalpally, "Digital
+ Private Network Signaling System (DPNSS)/Digital Access
+ Signaling System 2 (DASS 2) Extensions to the IUA
+ Protocol", RFC 4129, September 2005.
+
+ [RFC4233] Morneault, K., Rengasami, S., Kalla, M., and G.
+ Sidebottom, "Integrated Services Digital Network (ISDN)
+ Q.921-User Adaptation Layer", RFC 4233, January 2006.
+
+Authors' Addresses
+
+ Michael Tuexen
+ Muenster Univ. of Applied Sciences
+ Stegerwaldstr. 39
+ 48565 Steinfurt
+ Germany
+
+ EMail: tuexen@fh-muenster.de
+
+
+ Ken Morneault
+ Cisco Systems, Inc.
+ 13615 Dulles Technology Drive
+ Herndon, VA 20171
+ US
+
+ Phone: +1-703-484-3323
+ EMail: kmorneau@cisco.com
+
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+Tuexen & Morneault Standards Track [Page 3]
+
+RFC 5133 TEI Query Request Number Change December 2007
+
+
+Full Copyright Statement
+
+ Copyright (C) The IETF Trust (2007).
+
+ This document is subject to the rights, licenses and restrictions
+ contained in BCP 78, and except as set forth therein, the authors
+ retain all their rights.
+
+ This document and the information contained herein are provided on an
+ "AS IS" basis and THE CONTRIBUTOR, THE ORGANIZATION HE/SHE REPRESENTS
+ OR IS SPONSORED BY (IF ANY), THE INTERNET SOCIETY, THE IETF TRUST AND
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+
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+Tuexen & Morneault Standards Track [Page 4]
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