This parameter shows current mode of the line. The possible modes are as shown above. Normally line stays in active mode, if everything is fine. If the line test fails, it goes into training mode and tries to acquire next possible lower rate. The line can also go into the training mode when the line card is unable to communicate to the remote end. It does not come out of the training mode until it is able to acquire a user requested rate or a lower rate, if that is unattainable. This mode is changed by the system to down, when the subscriber line is administratively disabled.