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Appendix D. TSU 120 System Messages
ALARM MESSAGES
Network Interface (NI)
Nx56/64 Interface
120
The following messages indicate an alarm condition
on the network interface:
Red Alarm
Yellow Alarm
Blue Alarm
Loss of Signal
The following messages indicate an alarm condition
on the Nx56/64 card:
Clock Slip
PLL Alarm
Zeros Alarm
FIFO Alarm
No EXT Clock
TSU 120 User Manual
NI unable to frame align with
incoming signal
Remote alarm indication (RAI)
being received from far end
Unframed all ones (1s) (AIS)
being received at NI
No signal detected at NI
Difference in frequency of the
data clock at the network and
DTE
Unable to achieve Phase Locked
Loop on theclock provided by the
network interface
All zeros (0s) data being sent
toward the network interface
Error in propagation of data
through the FIFOS
No external transmit clock at DTE
(only appears if EXT CLK is
selected)Status Messages
61200.129L1-1
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