Revision Summary Date Revision History Revision Class Comments 4/4/2008 0.1 New Initial Availability 4/25/2008 0.2 Updated based on feedback 6/27/2008 1.0 Major Updated and revised the technical content. 8/15/2008 1.01 Major Revised and edited the technical content. 9/12/2008 1.02 Revised and edited the technical content. 12/12/2008 2.0 Updated and revised the technical content. 2/13/2009 2.01 Minor Revised and edited the technical content. 3/13/2009 2.02 Minor Revised and edited the technical content. 7/13/2009 2.03 Revised and edited the technical content 8/28/2009 2.04 Editorial Revised and edited the technical content 11/6/2009 2.05 Minor Revised and edited the technical content 2/19/2010 2.06 Editorial Revised and edited the technical content
3/31/2010 2.07 Major Updated and revised the technical content 4/30/2010 2.08 Editorial Revised and edited the technical content 6/7/2010 2.09 Editorial Revised and edited the technical content 6/29/2010 2.10 Editorial Changed language and formatting in the technical content. 7/23/2010 2.10 None No changes to the meaning, language, or formatting of the technical content. 9/27/2010 3.0 Major Significantly changed the technical content. 11/15/2010 3.0 None No changes to the meaning, language, or formatting of the technical content. 12/17/2010 3.0 None No changes to the meaning, language, or formatting of the technical content. 3/18/2011 3.0 None No changes to the
meaning, language, or formatting of the technical content. 11/18/2013 5.0 None No changes to the meaning, language, or formatting of the technical content. 2/10/2014 5.0 None No changes to the meaning, language, or formatting of the technical content. 4/30/2014 5.1 Minor Clarified the meaning of the technical content. 7/31/2014 5.2 Minor Clarified the meaning of the technical content. 10/30/2014 5.2 None No changes to the meaning, language, or formatting of the technical content. 3/30/2015 6.0 Major Significantly changed the technical content. 9/4/2015 7.0 Major Significantly changed the technical content.
7/15/2016 7.0.1 Editorial Changed language and formatting in the technical content. 9/14/2016 7.0.1 None No changes to the meaning, language, or formatting of the technical content. 12/15/2016 7.1 Minor Clarified the meaning of the technical content. 4/27/2018 8.0 Major Significantly changed the technical content.
Change Tracking This section identifies changes that were made to this document the last release. Changes are classified as Major, Minor, or None. The revision class Major means that the technical content in the document was significantly revised. Major changes affect protocol interoperability or implementation. Examples of major changes are: A document revision that incorporates changes to interoperability requirements. A document revision that captures changes to protocol functionality. The revision Minor means that the meaning of the technical content was clarified. Minor changes do not affect protocol interoperability or implementation. Examples of minor changes are updates to clarify ambiguity at the sentence, paragraph, or table level. The revision class None means that no new technical changes were introduced. Minor editorial and formatting changes may have been made, but the relevant technical content is identical to the last released version. The changes made to this document are listed in the following table. For more information, please contact . Section Description Revision class Appendix E: Product Behavior Updated list of supported products. major
A Abstract data model 79 79 79 74 38 52 52 52 80 39 69 70 70 70 69 70 47 43 77 73 50 77 47 56 57 57 69 70 70 70 69 70 72 59 76 41 Agent anonymity extensions 79 79 79 94 80 80 80 message processing 80 79 sequencing rules 80 80 79 20 C Call context extensions 74 89 75 74 76 75 75 76 32 36 35 35 35 32 32 36 34 34 33 74 102 75 75 76 76 74 32 36 35 35 35 32 32 36 34 34 33 20 109 Client 38 38 38 38 38 38 38 38 38 24 30 D Data model - abstract 79 79 79 74 38 52 52 52
70 69 70 88 71 71 71 71 71 71 30 69 71 71 71 71 71 20 Firewall traversal aid 47 83 48 48 47 49 48 48 47 48 48 49 47 26 G 11 GRUU mechanism 43 82 44 44 43 44 46 44 46 44 43 44 46 44 46 43 H Higher-layer triggered events 80 75 38 dialog state recovery 53 81 39 39 71 48 48 44 44 ICE SDP interworking 78 logging and monitoring extensions 73 51 multipart MIME 78 48 48 phone number resolution 57 71 72 60 77 42 42 History-Info header 87 extensions 31 66 31 I ICE SDP interworking 77 higher-layer triggered events 78 78 79 message processing 79 78 77 sequencing rules 79 78 79 77 97 97 19 Initialization 80 74 38 dialog state recovery 53 80 39 39 71 47 43 44 78 73
50 78 47 phone number resolution 57 71 72 60 77 41 41 11 L Local events 80 76 38 56 81 41 71 49 46 79 74 52 79 49 58 71 72 69 77 43 Location profile 101 26 26 26 Logging and monitoring extensions 73 triggered events 73 73 74 73 74 74 73 73 74 74 74 73 M Message processing agent anonymity extensions 80 75 75 76 38 dialog state recovery 53 54 54 81 81 81 40 40 40 40 71 71 71 48 48 44 46 44 ICE SDP interworking 79 78 73 74 74 message routing with redundant server 51 multipart MIME 79 78 48 48 phone number resolution 57 71 71 71 72 72 72 routing script preamble 66 60 66 66 65 65 65 66 62 66 60 77 42 43 42 Message routing with redundant server 50 84 51 50 52 message processing 51
49 sequencing 51 51 timers 50 Messages 32 36 35 35 35 32 32 36 34 34 33 24 30 37 30 30 26 31 26 26 26 36 29 29 29 21 31 37 31 29 24 27 28 27 28 28 27 28 21 Contact header ( 23, 23) Path header ( 22, 23) Record-Route header field ( 22, 23) Request-URI header field ( 23, 23) Route header field ( 22, 23, 23) 21 23 21 25 Ms-Call-Info header field 79 36 36 29 70 29 70 29 70 69 70 Multipart MIME 77 example 90 higher-layer triggered events 78 78 79 message processing 79 78 77 sequencing rules 79 78 79 77 Multi-part MIME example 92 N 21 NAT traversal aid 47 83 48 48 47 49 48 48 47 48 48 49 47 16 O 31 19 P P-Agent-On-Behalf-Of header field 79 37 37 97 31 number resolution 56 57 57 higher-layer triggered events 57 initialization 57 58 message processing
57 56 sequencing rules 57 58 57 20 20 104 Public IM connectivity extension 69 70 70 70 69 70 88 71 71 71 71 71 71 30 69 71 71 71 71 71 R 29 24 16 19 16 20 Remote users extension 72 89 72 72 72 72 72 72 30 71 72 72 72 72 72 Routing preamble example 85 86 86 87 Routing script preamble 59 extensions for call processing and routing 58 60 60 69 27 28 27 28 28 27 28 message processing 66 60 66 66 65 65 65 66 62 66 60 98 sequencing rules 66 60 66 66 65 65 65 66 62 66 60 timer events 69 69 68 69 timers 59 59 59 59 27 28 27 28 28 27 28 S Safe call transfer extension 76 77 77 77 77 76 77 77 77