
Chapter 4. Status
Condition | Description |
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|
Normal | No alarms are currently being received. |
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|
RAI (Yellow | The unit is transmitting a yellow alarm from the |
Alarm) | network. This alarm is a signal sent back toward |
| the source of a failed transmit circuit. The |
| (X1 and X2) are set to zero. |
|
|
LOS (Red | The unit has lost the Rx signal. |
Alarm) |
|
|
|
AIS (Blue | The unit is receiving a blue alarm condition from |
Alarm) | the network. A blue alarm occurs when consecu- |
| tive 1010s are received in the information bits. |
| This indicates that there is a transmission fault lo- |
| cated either at or upstream from the transmitting |
| terminal. |
|
|
OOF | The unit detects an out of frame condition from the |
| network. |
|
|
Idle | The unit detects an idle sequence from the net- |
| work. Service is immediately available for use. |
|
|
Eqpt Fail (SA) | The network has signaled a service affecting |
| equipment failure condition. |
|
|
Eqpt Fail | The network has signaled a |
(NSA) | equipment failure condition. |
|
|
Com Eqpt Fail | The network has signaled a |
(NSA) | common equipment failure condition. |
|
|
Unknown | The T3SU 300 is unable to determine the state of |
| the network or the remote unit. |
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T3SU 300 User Manual |