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Media Gateway Control (Megaco)                         Selvam Rengasami
Internet Draft                                   Telcordia Technologies
Document: draft-ietf-megaco-h248k-00.txt              Zacharias Bilalis
Category: Standards Track                                       Siemens
                                                              July 2000


              H.248 Annex K (Pre-Decision White Document)


Status of this Memo

   This document is an Internet-Draft and is in full conformance with
   all provisions of Section 10 of RFC2026 [1].

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF), its areas, and its working groups. Note that
   other groups may also distribute working documents as Internet-
   Drafts. Internet-Drafts are draft documents valid for a maximum of
   six months and may be updated, replaced, or obsoleted by other
   documents at any time. It is inappropriate to use Internet- Drafts
   as reference material or to cite them other than as "work in
   progress."
   The list of current Internet-Drafts can be accessed at
   http://www.ietf.org/ietf/1id-abstracts.txt
   The list of Internet-Draft Shadow Directories can be accessed at
   http://www.ietf.org/shadow.html.


1. Abstract

   This document reproduces the content of the ITU-T Study Group 16
   White Document draft of H.248 Annex K, which is scheduled for
   decision in Geneva in November 2000.  H.248 Annex K provides the
   Generic Announcement package.

   This document is submitted for IETF comment prior to ITU-T decision,
   in accordance with procedures currently being negotiated between
   ITU-T Study Group and ISOC on behalf of the IETF.


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 RFC-2119 [2].


3. Generic Announcement PACKAGE

   PackageID: an, 0x001d
   Version: 1
   Extends: None

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   That package supports announcement functionality at a Media Gateway

3.1 Properties

   None

3.2 Events

3.2.1 Announcement completed

   EventID: ac (0x0001)

   Description: Indicates the completion of the announcement.

   EventDescriptor parameters:

        None

   ObservedEventDescriptor parameters:

        None

3.2.2 Announcement failure

   EventID: af (0x0002)

   Description: Indicates the failure of the announcement.

   EventDescriptor parameters

        None

   ObservedEventDescriptor parameters

        None

3.3 Signals

3.3.1 Fixed - Announcement play

   SignalID: apf (0x0003)

   Description: Initiates the play of a fixed announcement

   Parameters:

   Announcement name
        ParameterID:  an (0x0001)
        Type: enumeration of announcements.
        Default is TO


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   Number of cycles
        ParameterID:  noc (0x0002)
        Type: integer.
        Values: any
        Default: 1



3.3.2 Variable - Announcement play

   SignalID: apv (0x0004)

   Description: Initiates the play of a variable announcement

   Parameters:

   Announcement name
        ParameterID:  an (0x0001)
        Type: enumeration of announcements.
        Default is TO

   Number of cycles
        ParameterID:  noc (0x0002)
        Type: integer.
        Values: any
        Default: 1

   Number
        ParameterID:  num (0x0003)
        Type:  integer
        Values:  any

   Specific parameters interpretation
        ParameterID:  spi (0x0004)
        Type:  enumeration
        Values: any

   Specific parameters
        ParameterID:  sp (0x0005)
        Type:  string
        Values: any
        Default is provisioned for every anouncement.

3.3.3 Statistics

   None

3.3.4 Procedures

   An MGC may send a fixed play announcements message to the MG.  An MG
   receiving such a signal plays the indicated announcement (indicated

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   by the name parameter) for the duration specified by the noc
   parameter.  If an noc parameter is not included, the MG uses a
   default of 1 cycle.

   To provide additional information when an announcement is to be
   played, the MGC sends a play variable announcement signal to the MG.
   An MG receiving such a signal plays the indicated announcement
   (indicated by the name parameter) for the duration specified by the
   noc parameter.  If an noc parameter is not included, the MG uses a
   default of 1.  If the sp parameter is included, the MG uses the
   Specific parameters interpretation parameter to identify the
   particular type of information to be included in the announcement.
   Examples of the types of Specific parameters include a telephone
   number, date, or time.


4. Security Considerations

   Security considerations regarding media gateway control are
   discussed in section 10 of [3].


5. References


   1  Bradner, S., "The Internet Standards Process -- Revision 3", BCP
      9, RFC 2026, October 1996.

   2  Bradner, S., "Key words for use in RFCs to Indicate Requirement
      Levels", BCP 14, RFC 2119, March 1997.

   3  ITU-T Recommendation H.248, "Gateway Control Protocol", Geneva,
      June 2000.  Also to appear as RFC xxxx (currently draft-ietf-
      megaco-merged-01.txt).


6. Authors' Addresses

   Selvam Rengasami (editor)
   Telcordia Technologies
   Phone: + 1 732 758 5260
   Email: srengasa@telcordia.com

   Zacharias Bilalis (editor)
   Siemens
   Phone: + 49 89 722 28391
   Email: zacharias.bilalis@icn.siemens.de






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