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A ppendix C. System Messages
Nx56/ 64 Interface
The following messages indicate an alarm condition on the Nx56/
64 card:
Clock Slip
PLL Alarm
Zeros Alarm
FIFO Alarm
No EXT Clock No external transmit clock at DTE (only appears
C-2
Difference in frequency of the data clock at the
network and DTE
Unable to achieve Phase Locked Loop on the
clock provided by the network interface.
All zeros (0s) data being sent toward the network
interface
Error in propagation of data through the FIFOs
if EXT CLK is selected)
ESU 120e User Manual
1200420L1-1
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