T1 ESF CSU ACE User Manual Chapter 3. Operation
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2)NI ERR/ALM, Submenu of 1)STATUS
The NI ERR/ALM menu is used for viewing currently active/inactive errors and alarms on the network
interface.
Figure 3-12. First Current NI Errors/Alarms Screen
The up and down scroll keys are used to access the complete display of the errors/alarms that are
currently active. The alarms and errors which can be seen are shown below:
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 LOS (loss of signal)/out of frame (OOF) causing red alarm at NI
Code Violations Bipolar violations (BPVs), frame bit errors, and cyclic redundancy check
(CRC) errors in ESF or BPVs and frame bit errors in SF were received at
NI
Bipolar Violations BPVs in SF or ESF at NI
Frame Bit Errors Frame bits received incorrectly at NI
3)NI HISTORY, Submenu of 1)STATUS
The NI History menu is used for viewing the history of errors and alarms on the network interface. If
an alarm has occurred since the last Clear History selection, the menu will be active. If the condition
hasn’t occurred, the menu will be inactive. The Clear History screen is shown in Figure 3-13.
Figure 3-13. Clear History Screen
The conditions reported are the same as those in the NI ERR/ALM submenu but provide historical data
on Alarms/Errors instead of current data on Alarm/Errors.
4)TI ERR/ALM, Submenu of 1)STATUS
The T1 ERR/ALM screens are the same as the NI ERR/ALM screens except that they correspond to
the terminal interface.
