ADTRAN ESU 120e user manual Nx56/ 64 Interface

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