
Appendix C. System Messages
PLL Alarm
Unable to achieve Phase Locked Loop on the clock pro- vided by the network interface.
Zeros Alarm
All zeros (0s) data being sent toward the network inter- face.
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).
DS-1 (PBX) Interface
The following messages indicate a condition on the Base
Red Alarm
Not able to frame data coming to the
Yellow Alarm
Remote alarm indicator (RAI) being received by the
Blue Alarm
Receiving unframed all 1s at the
Loss of Signal
No signal detected by the
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