Cisco Cisco IOS Software Release 12.2(2)XA

To configure the sending of persistent events from the gateway to the call agent, use the mgcp 
persistent global configuration command. To return to the default values, use the no form of this 
command.

mgcp persistent {hookflash | offhook | onhook}

no mgcp persistent {hookflash | offhook | onhook}

Global configuration

The offhook option is enabled for persistence.

The onhook option is disabled for persistence.

The hookflash detection option is disabled for persistence.

Persistent events are those events that, once they are detected, are defined as reportable to the call agent 
whether or not the call agent has explicitly requested to be notified of their occurrence; that is, even if 
they are not included in the list of RequestedEvents that the gateway is asked to detect and report. Such 
events include, for example, fax tones, continuity tones, or on-hook transition; each event has an 
associated action for the gateway to take.

Use the mgcp persistent command for each type of persistent event that should override the default 
behavior.

The following example shows how to configure the gateway to send persistent onhook events to the call 
agent:

Router(config)# mgcp persistent onhook

Sends persistent hookflash events to the call agent.

Sends persistent offhook events to the call agent.

Sends persistent onhook events to the call agent.

12.2(2)XA

This command was introduced.

Starts and allocates resources for the MGCP daemon.