ADTRAN 1202156L1 Manual do Utilizador descarregar pdf (Página 120)

Appendix C. System Messages

C-2 TDU 120e User Manual 61202156L1-1

Table C-1. Network Interface (NI) Alarms

Alarm Name Description

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

Table C-2. Nx/DBU Interface Alarms

Alarm Name Description

Clock Slip Difference in frequency of the data clock at the net-

work 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)

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