Cisco Cisco IOS Software Release 12.2(2)XA

To configure the packet storage timeout value (Thist), use the timeout thist MGCP profile command. 
To set the value to the default, use the no form of this command.

timeout thist thist-value

no timeout thist thist-value

30 seconds

MGCP profile

MGCP messages are carried over UDP, and are therefore subject to packet loss. When a response to a 
message is not received promptly, the sender retransmits the message. The gateway keeps in memory a 
list of the responses it has sent for the number of seconds in the Thist timeout value. The gateway also 
keeps a list of the messages currently being processed, with their transaction identifiers, to prevent 
processing or acknowledging the same message more than once.

The following example shows how to set the packet storage timeout value (Thist) to 15 seconds:

Router(config)# mgcp profile nyc-ca

Router(config-mgcp-profile)# timeout thist 15

Specifies the package storage timeout value (Thist), in seconds. Range is 1 
to 60.

12.2(2)XA

This command was introduced.

Starts and allocates resources for the MGCP daemon.

Initiates MGCP profile mode to create and configure a named MGCP 
profile associated with one or more endpoints, or to configure the default 
profile.