MGCP Control Commands
A call agent uses control commands or messages to direct its
gateways and their operational behavior. Gateways use the following control
commands in responding to requests from a call agent and notifying the call
agent of events and abnormal behavior:
-
EndpointConfiguration (EPCF)
Identifies the coding characteristics of the endpoint interface on the line side
of the gateway. The call agent issues the command.
-
NotificationRequest (RQNT)
Instructs the gateway to watch for events on an endpoint and specifies the
action to take when the events occur. The call agent issues the command.
-
Notify (NTFY) Informs the call
agent of an event for which notification was requested. The gateway issues the
command.
-
CreateConnection (CRCX)
Instructs the gateway to establish a connection with an endpoint. The call agent
issues the command.
-
ModifyConnection (MDCX)
Instructs the gateway to update its connection parameters for a previously
established connection. The call agent issues the command.
-
DeleteConnection (DLCX)
Informs the recipient to delete a connection. The call agent or the gateway can
issue the command. The gateway or the call agent issues the command to advise
that it no longer has the resources to sustain the call.
-
AuditEndpoint (AUEP) Requests
the status of an endpoint. The call agent issues the command.
-
AuditConnection (AUCX) Requests the
status of a connection. The call agent issues the command.
-
RestartInProgress (RSIP)
Notifies the call agent that the gateway and its endpoints are removed from
service or are being placed back in service. The gateway issues the
command.