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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
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
reported by either the base controller or any of the ports. If no
alarms are current, using this menu item displays
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 (
one or more of the Alarm LEDs are illuminated, an alarm is
present. Pressing
61202129L1-1
submenu displays the types of errors the Net-
NI ERRORS
CRC-6 bit errors based on the FDL. This is valid
CRC
only in ESF mode.
Bipolar violations.
BPV
Excess zeros.
0
XS
Framing errors.
FER
Cancel
TSU 120 User Manual
Chapter 4. Status Menu
Shift+8
returns to the previous menu item.
L
)
LARM
IST
.
End of List
) on the keypad. If
4-3
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