
Chapter 3. Operation
DSU/DSX Status
The DSU/DSX status LEDs display the operational condition of the Nx56/64 and
OK (GREEN) Indicates the operation is in the normal mode
| and no errors have been detected. |
TEST | Indicates that one of the interfaces is operating |
(YELLOW) | in a test mode. This includes a |
| loopback. When lighted, this LED also indicates |
| that normal data flow is not occurring in at least |
| one of the module ports. |
ALARM (RED) Indicates an alarm condition has been detected. When the alarm condition is no longer valid, the OK LED activates (turns on). To view an alarm condition, select the active alarm menu item or select Alarm by pressing Shift+8. If the alarm conditions have been corrected, the alarm which caused the activation of the Alarm LED can be viewed under the Unit History Menu.
Module Status
The module status LEDs display the operational condition of ports installed in the option slots.
OK (GREEN) Indicates the operation is in the normal mode
| and no errors have been detected. |
TEST | Indicates that one of the interfaces is operating |
(YELLOW) | in a test mode. This includes a |
| loopback. When lighted, this LED also indicates |
| that normal data flow is not occurring in at least |
| one of the module ports. |
TSU 120 User Manual |