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Cisco ATA 186 and Cisco ATA 188 Analog Telephone Adaptor Administrator’s Guide for MGCP (version 3.0)
OL-4803-01
Chapter 3 Configuring the Cisco ATA for MGCP
Obtaining Cisco ATA Configuration File After Failed Attempt
Procedure to Refresh the Cisco ATA
To refresh the Cisco ATA, enter the following command from your web browser:
http://<ipaddress>/refresh
where ipaddress is the IP address of the Cisco ATA that you are refreshing.
Procedure to Reset the Cisco ATA
To reset the Cisco ATA, enter the following command from your web browser:
http://<ipaddress>/reset
where ipaddress is the IP address of the Cisco ATA that you are resetting.
Obtaining Cisco ATA Configuration File After Failed Attempt
The Cisco ATA uses the following formula for determining how soon to contact the TFTP server for the
Cisco ATA configuration file after a failed attempt at getting the file. The result of the formula is called
the random back-off amount.
random back-off amount = CfgInterval + random(min(1800, CfgInterval))
where
• CfgInterval is the value of the CfgInterval configuration parameter (in seconds). For more
information about this parameter, see the “CfgInterval” section on page 5-5.
• random(x) function yields a value between 0 and x-1.
• min(x,y) function yields the smaller value of x and y.
Upgrading the MGCP Signaling Image
For instructions on how to upgrade the Cisco ATA to the most recent MGCP signaling image, refer to
the following list:
• To use the recommended TFTP method of upgrading the Cisco ATA, see the “Upgrading the
Signaling Image from a TFTP Server” section on page 7-1.
• In the rare instance that you are not using the TFTP server to configure the Cisco ATA and to obtain
software upgrades, you must manually upgrade to the latest signaling image immediately after the
Cisco ATA boots up. In this case, see the “Upgrading the Signaling Image Manually” section on
page 7-2.