A ppendix C. System Messages

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 the

 

clock 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)

 

 

C-2

ESU 120e User Manual

1200420L1-1

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ADTRAN ESU 120e user manual Nx56/ 64 Interface