draft-ietf-megaco-h248v2-04.txt

OTP是开放电信平台的简称

      Media Gateway Control (megaco)                C. Groves, M. Pantaleo 
      Internet Draft                                           LM Ericsson 
      Document: draft-ietf-megaco-h248v2-04.txt                T. Anderson 
      Expires: October 2003                            Lucent Technologies 
                                                                 T. Taylor 
                                                           Nortel Networks 
                                                                 (Editors) 
                                                                April 2003 
       
       
              The Megaco/H.248 Gateway Control Protocol, version 2 

   Status of this Memo 

      This document is an Internet-Draft and is in full conformance with 
      all provisions of Section 10 of RFC2026.  
       
      Internet-Drafts are working documents of the Internet Engineering 
      Task Force (IETF), its areas, and its working groups.  Note that      
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   Abstract 

      This document describes the second version of the general-purpose 
      gateway control protocol standardized as Megaco in the IETF and as 
      Recommendation H.248 (now H.248.1) in the ITU-T.  It is common text 
      with Recommendation H.248.1 (05/02), published by the ITU-T.  Megaco 
      v2 includes the corrections to RFC 3015 which resulted in RFC xxxx 
      [draft-ietf-megaco-3015corr-02.txt], plus the following new 
      capabilities: 

      - ability to audit specific properties, events, signals and  
        statistics 
      - use of serviceChange to indicate that capabilities have changed in 
        the Media Gateway 
      - playing a signal on the Root Termination 
      - limiting the number of repetitions of transaction pending 
      - allowing topology to be set per stream 
      - ability to audit context properties 
    
    
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      - new Nx64K multiplex type 
      - provision for digit buffering when a digit map completes. 

      In addition, the use of the Modem Descriptor was deprecated. 

      A detailed list of changes from draft-ietf-megaco-3015corr-
      02.txt/H.248.1 (03/02) to this document is given in Appendix II at 
      the end of this document.   

   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 RFC-2119. 



































    
    
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   Table of Contents 

      1           SCOPE.................................................6 
       
      2           REFERENCES............................................6 
      2.1         Normative references..................................7 
      2.2         Informative references................................9 
       
      3           DEFINITIONS..........................................10 
       
      4           ABBREVIATIONS........................................11 
       
      5           A NOTE ON CONVENTIONS................................12 
       
      6           CONNECTION MODEL.....................................12 
      6.1         Contexts.............................................15 
      6.1.1       Context attributes and descriptors...................16 
      6.1.2       Creating, deleting and modifying Contexts............16 
      6.2         Terminations.........................................16 
      6.2.1       Termination dynamics.................................20 
      6.2.2       TerminationIDs.......................................20 
      6.2.3       Packages.............................................21 
      6.2.4       Termination properties and descriptors...............22 
      6.2.5       Root Termination.....................................24 
       
      7           COMMANDS.............................................25 
      7.1         Descriptors..........................................26 
      7.1.1       Specifying parameters................................26 
      7.1.2       Modem descriptor.....................................27 
      7.1.3       Multiplex descriptor.................................27 
      7.1.4       Media descriptor.....................................28 
      7.1.5       TerminationState descriptor..........................28 
      7.1.6       Stream descriptor....................................29 
      7.1.7       LocalControl descriptor..............................30 
      7.1.8       Local and Remote descriptors.........................31 
      7.1.9       Events descriptor....................................34 
      7.1.10      EventBuffer descriptor...............................37 
      7.1.11      Signals descriptor...................................37 
      7.1.12      Audit descriptor.....................................39 
      7.1.13      ServiceChange descriptor.............................40 
      7.1.14      DigitMap descriptor..................................40 
      7.1.14.1    DigitMap definition, creation, modification and 
                      deletion.........................................40 
      7.1.14.2    DigitMap Timers......................................41 
      7.1.14.3    DigitMap Syntax......................................41 
      7.1.14.4    DigitMap Completion Event............................42 
      7.1.14.5    DigitMap Procedures..................................43 
      7.1.14.6    DigitMap Activation..................................45 
      7.1.14.7    Interaction Of DigitMap and Event Processing.........45 
    
    
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      7.1.14.8    Wildcards............................................46 
      7.1.14.9    Example..............................................46 
      7.1.15      Statistics descriptor................................47 
      7.1.16      Packages descriptor..................................47 
      7.1.17      ObservedEvents descriptor............................47 
      7.1.18      Topology descriptor..................................47 
      7.1.19      Error Descriptor.....................................51 
       
      7.2         Command Application Programming Interface............51 
      7.2.1       Add..................................................52 
      7.2.2       Modify...............................................53 
      7.2.3       Subtract.............................................54 
      7.2.4       Move.................................................56