ADTRAN TSU 120, Руководство пользователя

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