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Chapter 4. Status Menu
61202129L1-1 TSU 120 User Manual
4-3
Since only the user’s copy of performance data is cleared by the
TSU 120, the data displayed here might be different from the
data sent to the network as PRM data.
Network Interface Errors (NI ERRORS)
The
NI
ERRORS
submenu displays the types of errors the Net-
work Interface (NI) detects. A blinking CSU error LED indi-
cates that network errors are detected.
The asterisk (*) above an item indicates the type of errors
detected. The error types are the following:
Active Alarms
This menu item displays a list of current alarms (
A
LARM
L
IST
)
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 includes two lines of text. The top line is the alarm
source. The bottom line is the alarm message. See Figure 4-3 on
page 4-4. A list of alarm messages is found in Appendix C, TSU
120 System Messages on page C-1.
In addition to normal menu operation, you can also access this
menu item with the Alarm function (
Shift+8) on the keypad. If
one or more of the Alarm LEDs are illuminated, an alarm is
present. Pressing
Cancel returns to the previous menu item.
CRC
CRC-6 bit errors based on the FDL. This is valid
only in ESF mode.
BPV
Bipolar violations.
XS
0
Excess zeros.
FER
Framing errors.