# EDT FORCE FAILBACK

## Qualifiers:

ALL

<cabinet> <shelf> <slot> <port> (default port is 1)

## Purpose:

This command applies to the T1/E1 trunk resiliency feature. It allows you to force a resilient T1/E1 trunk to fail back immediately from the secondary controller to the primary controller.

If the primary controller fails, the resilient T1/E1 trunk is transferred to the secondary controller. After the primary controller returns to service, use this command to return support for the resilient T1/E1 trunk to the primary controller.

## Details:

- You must enter this command on the primary controller.

- All calls in progress on the T1/E1 MMC card (PN 50005160) in the secondary controller are dropped when the system transfers support for the trunk back to the primary.

- If the command is successful, the system displays a message indicating that the trunk has been transferred.

- You will receive an error message if you enter this command

- on the secondary controller

- without specifying the physical location (PLID) of a T1/E1 Combo MMC card

- before the primary controller has returned to service

- You can only issue this command from the Maintenance Commands form of the System Administration Tool. You cannot enter this command from the local telnet maintenance terminal (port 2023).

- The ALL qualifier applies the command to all resilient T1/E1 trunk circuits on the controller.

NOTES

- Before you enter the EDT Force Failback command, use the State command to ensure that all the circuits are idle.

- You can use the Programmed Failback command to schedule the resilient T1/E1 trunk to automatically fail back from the secondary.

## Example:

### Entry: EDT FORCE FAILBACK 6 1 2 1

### System Response:

2005-11-18 11:00:27 EDT FORCE FAILBACK 6 1 2 1

If resiliency is not enabled for the trunk, the system response is

2005-11-18 11:00:27 EDT FORCE FAILBACK Failed, Resiliency not enabled.

If you do not enter the command from the primary controller, the system response is

2005-11-18 11:00:27 EDT FORCE FAILBACK Failed, must invoke from Primary Controller.

If the trunk is not connected to a T1/E1 Combo MMC, the system response is

2005-11-18 11:00:27 EDT FORCE FAILBACK Failed, T1E1 Combo Module required.

Related Topics

- EDT Show Resiliency

- EDT Force Failover

- Programmed Failback