Meridian Nortel 1 Option 11C Technical Reference Manual page 495

Table 153
NTBK50 faceplate LEDs (Part 1 of 2)
LED
OOS
ACT
RED
YEL
LBK
CC
In general, the LEDs operate as shown in Table 153.
State
On (Red)
Off
On (Green)
Off
On (Red)
Off
On (Yellow)
Off
On (Green)
Off
On (Red)
On (Green)
NTBK50 2.0 Mb PRI card
The NTBK50 2.0 Mb PRI circuit card is either
disabled or out-of-service. Also, the state of the card
after power-up, completion of self test, and exiting
remote loopback.
The NTBK50 2.0 Mb PRI is not in a disabled state.
The NTBK50 2.0 Mb PRI circuit card is in an active
state.
The NTBK50 2.0 Mb PRI is in a disabled state. The
OOS LED is red.
A red alarm state has been detected. This
represents a local alarm state of Loss of Carrier
(LOS), Loss of Frame (LFAS) or Loss of CRC
Multiframe (LMAS).
No red (local) alarm.
A yellow alarm state has been detected. This
represents a remote alarm indication from the far
end. The alarm may be either Alarm Indication (AIS)
or Remote Alarm (RAI).
No yellow (remote) alarm.
2.0 Mb PRI is in loop-back mode.
2.0 Mb PRI is not in loop-back mode
The clock controller is software disabled
The clock controller is enabled and is either locked
to a reference or is in free run mode
Option 11C and 11C Mini
Page 495 of 544
Definition
Technical Reference Guide