RFC 2705 (rfc2705) - Page 2 of 134

Media Gateway Control Protocol (MGCP) Version 1

RFC 2705         Media Gateway Control Protocol (MGCP)      October 1999


   *  The interface section presents a conceptual overview of the MGCP,
      presenting the naming conventions, the usage of the session
      description protocol SDP, and the procedures that compose MGCP:
      Notifications Request, Notification, Create Connection, Modify
      Connection, Delete Connection, AuditEndpoint, AuditConnection and
      RestartInProgress.

   *  The protocol description section presents the MGCP encodings,
      which are based on simple text formats, and the transmission
      procedure over UDP.

   *  The security section presents the security requirement of MGCP,
      and its usage of IP security services (IPSEC).

   *  The event packages section provides an initial definition of
      packages and event names.

   *  The description of the changes made in combining SGCP 1.1 and IPDC
      to create MGCP 1.0.

Table of Contents

   1.  Introduction ..............................................  5
      1.1.  Relation with the H.323 standards ....................  7
      1.2.  Relation with the IETF standards .....................  8
      1.3.  Definitions ..........................................  9
   2.  Media Gateway Control Interface ...........................  9
      2.1.  Model and naming conventions. ........................ 10
         2.1.1.  Types of endpoints .............................. 10
            2.1.1.1.  Digital channel (DS0) ...................... 11
            2.1.1.2.  Analog line ................................ 11
            2.1.1.3.  Annoucement server access point ............ 12
            2.1.1.4.  Interactive Voice Response access point .... 12
            2.1.1.5.  Conference bridge access point ............. 13
            2.1.1.6.  Packet relay ............................... 13
            2.1.1.7.  Wiretap access point ....................... 14
            2.1.1.8.  ATM "trunk side" interface. ................ 14
         2.1.2.  Endpoint identifiers ............................ 15
         2.1.3.  Calls and connections ........................... 17
            2.1.3.1.  Names of calls ............................. 20
            2.1.3.2.  Names of connections ....................... 20
            2.1.3.3.  Management of resources, attributes of ..... 20
            2.1.3.4.  Special case of local connections .......... 23
         2.1.4.  Names of Call Agents and other entities ......... 23
         2.1.5.  Digit maps ...................................... 24
         2.1.6.  Names of events ................................. 26
      2.2.  Usage of SDP ......................................... 29
      2.3.  Gateway Control Commands ............................. 30



Arango, et al.               Informational