Table 3-3. Alarms and Statistics (Cont.)
Alarm | Failure | Comments | Valid Modes |
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|
|
|
FEBE | Far End Block Error | The number of seconds in which | E1 CRC4 mode |
|
| the FEBE indication is received |
|
|
| from the remote E1 device. |
|
|
|
|
|
BES | Bursty Errored Seconds (Errored | The number of seconds with | |
| Second type B) | from two to 319 CRC error | |
|
| events with no AIS nor SEF |
|
|
| (Framing Bit Errors) error |
|
|
| detection. |
|
|
| Not applicable if Line Type is set |
|
|
| to Unframed |
|
|
|
|
|
DM | Degraded Minutes | A Degraded Minute is calculated | |
|
| by collecting all of the available | |
|
| seconds, subtracting any SESs |
|
|
| and sorting the result in 60 |
|
|
| second groups. |
|
|
| A Degraded Minute is a 60 |
|
|
| second group in which the |
|
|
| cumulative errors during the |
|
|
|
| |
|
|
| |
ES | Errored Second: If any error | Any second containing the |
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| occurs during one second. | following error events: |
|
|
| CRC |
|
|
| SEF (OOF) |
|
|
| AIS (T1 only). |
|
|
| If SES is also active (see below) |
|
|
| ES runs for 10 seconds and then |
|
|
| stops (T1 only). |
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|
|
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|
Configuring |