ADTRAN TSU LT Manuel d'utilisateur télécharger pdf (Page 33)

TSU LT User Manual 220V Chapter 4 Status Menu

ERR/ALM HIST MENU

Use this branch for viewing a history of errors and alarms. If an alarm has occurred since the last CLEAR

ISTORY selection, the menu condition is active; otherwise it is inactive (see Figure 4-4). Table 4-2

provides a complete list of the errors and alarms.

Figure 4-4. Clear History Screen

Table 4-2. Alarms and Errors (Current and Historical)

Errors and Alarms Meaning

Loss of Signal No pulses received at NI

AIS Alarm Unframed All-Ones received at NI

Out of Frame No framing pattern sync at NI

Yellow Alarm Receiving yellow alarm pattern from NI

Red Alarm Loss of signal/out of frame (LOS/OOF) causing red alarm at NI

Code Violations Cyclic redundancy check (CRC) errors in ESF, or bipolar violations (BPVs) in Superframe

Format (SF) were received at NI

Bipolar Violations BPVs (the presence of two consecutive bits of the same polarity) in SF or ESF

Frame Bit Errors Frame Bits received incorrectly at NI

PLL Alarm Unable to sync up to selected clock

1 2 ... 28 29 30 31 32 33 34 35 36 37 38 ... 59 60

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ADTRAN TSU LT Manuel d'utilisateur Page 33