Chapter 4. Status Menu

Network Interface (NI) Errors

The NI Errors submenu displays the types of errors the

Network Interface (NI) detects. A blinking CSU error

LED indicates that network errors are detected.

The asterisk (*) above an item indicates the type of errors detected. The error types are listed below:

CRC

CRC-6 bit errors based on the FDL. This is valid only in

ESF mode.

BPV

Bipolar violations

XSO

Excess zeros

FER

Framing errors

Active Alarms

This menu item displays a list of current alarms reported by either the base controller or any of the ports. If no alarms are current, using this menu item displays END OF

LIST.

This display (see Table 4-1 on page 4-4) includes two text fields. The left field is the alarm source. The right field is the alarm message. A list of alarm messages is found in Appendix C, System Messages.

If one or more of the Alarm LEDs are illuminated, an alarm is present. Press Escape to return to the previous menu item

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ADTRAN TDU 120e user manual Network Interface NI Errors, Active Alarms