[Asterisk-Users] MGCP parameters

[Karl Brose]

The RFC specification alone is not sufficient, there are many signaling 
"packages" that are defined elsewhere.
Also, RFC 2705 is out of date, see RFC 3435



Leonardo J. Tramontina wrote:

> Sirs,
>
> According to RFC 2705 (MGCP), these are the parameters that are used 
> in the transactions:
>
>
>        ReturnCode,
>        Connection-parameters
>        <-- DeleteConnection(CallId,
>                             EndpointId,
>                             ConnectionId,
>                             [Encapsulated NotificationRequest,]
>                             [Encapsulated EndpointConfiguration])
>
>
>            ReturnCode,
>            <-- DeleteConnection( CallId,
>                                  EndpointId,
>                                  ConnectionId,
>                                  Reason-code,
>                                  Connection-parameters)
>
>            ReturnCode,
>            <-- DeleteConnection( CallId,
>                                  EndpointId)
>
>
>            ReturnCode,
>            <-- DeleteConnection( EndpointId)
>
>
>              ReturnCode,
>                EndPointIdList|{
>                [RequestedEvents,]
>                [DigitMap,]
>                [SignalRequests,]
>                [RequestIdentifier,]
>                [NotifiedEntity,]
>                [ConnectionIdentifiers,]
>                [DetectEvents,]
>                [ObservedEvents,]
>                [EventStates,]
>                [BearerInformation,]
>                [RestartReason,]
>                [RestartDelay,]
>                [ReasonCode,]
>                [Capabilities]}
>                        <--- AuditEndPoint(EndpointId,
>                                                 [RequestedInfo])
>
>
>              ReturnCode,
>              [CallId,]
>              [NotifiedEntity,]
>              [LocalConnectionOptions,]
>              [Mode,]
>              [RemoteConnectionDescriptor,]
>              [LocalConnectionDescriptor,]
>              [ConnectionParameters]
>                        <--- AuditConnection(EndpointId,
>                                         ConnectionId,
>                                         RequestedInfo)
>
>
>
>          ReturnCode,
>          [NotifiedEntity]
>                <------- RestartInProgress ( EndPointId,
>                                             RestartMethod,
>                                             [RestartDelay,]
>                                             [Reason-code])
>
>
>
>           ReturnCode
>           <-- EndpointConfiguration( EndpointId,
>                                      BearerInformation)
>
>
>
>       ReturnCode
>       <-- NotificationRequest( EndpointId,
>                                [NotifiedEntity,]
>                                [RequestedEvents,]
>                                RequestIdentifier,
>                                [DigitMap,]
>                                [SignalRequests,]
>                                [QuarantineHandling,]
>                                [DetectEvents,]
>                                [encapsulated EndpointConfiguration])
>
>
>
>               ReturnCode
>               <-- Notify( EndpointId,
>                           [NotifiedEntity,]
>                           RequestIdentifier,
>                           ObservedEvents)
>
>
>            ReturnCode,
>            ConnectionId,
>            [SpecificEndPointId,]
>            [LocalConnectionDescriptor,]
>            [SecondEndPointId,]
>            [SecondConnectionId]
>            <--- CreateConnection(CallId,
>                                  EndpointId,
>                                  [NotifiedEntity,]
>                                  [LocalConnectionOptions,]
>                                  Mode,
>                                  [{RemoteConnectionDescriptor |
>                                    SecondEndpointId}, ]
>                                  [Encapsulated NotificationRequest,]
>                                  [Encapsulated EndpointConfiguration])
>
>
>
>
>      ReturnCode,
>      [LocalConnectionDescriptor]
>       <--- ModifyConnection(CallId,
>                             EndpointId,
>                             ConnectionId,
>                             [NotifiedEntity,]
>                             [LocalConnectionOptions,]
>                             [Mode,]
>                             [RemoteConnectionDescriptor,]
>                             [Encapsulated NotificationRequest,]
>                             [Encapsulated EndpointConfiguration])
>
>
>
>
> My questions:
>
> 1) I am using Asterisk and a softphone called MGCP eyeP Phone. I was 
> watching the traffic between them at Ethereal and observed that some 
> of them have extra parameters. Example: CreateConnection has "Request 
> Identifier (X)", that is not described on RFC 2705. Should I ignore or 
> consider it?
>
> 2) There are some parameters that don't have identifier? I mean, 
> "Request Identifier" is "X:"; "Observed Events" is "O: "; "Call ID" is 
> "C: "... These are them:
> - "Notified Entity"
> - "Remote Connection Descriptor"
> - "encapsulated Endpoint Configuration"
> - "Second Endpoint Id"
> - "encapsulated Notification Request"
>
> 2.1) How can I identify them when they exist?
>
> 2.2) What means "encapsulated" parameters??
>
>
>
> Thanks in advance,
>
> Leonardo
>
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