Ntbk50 Faceplate Leds - Nortel Meridian 1 Option 11C Manual

Page 100 of 126

NTBK50 Faceplate LEDs

553-3011-315 Standard 13.00
PRI Maintenance
The NTBK50 circuit card has a total of seven faceplate LEDs. Five of the
LEDs are directly associated with the operation of the Downloadable
D-channel handler and D-channel interface. The remaining two LEDs are
associated with the Clock Controller. Refer to Table .
Table 28
NTBK50 faceplate LEDs
LED State
OOS On (Red)
Off
ACT On (Green)
Off
RED On (Red)
Off
YEL On (Yellow)
Off
LBK On (Green)
Off
January 2002
Definition
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.
NTBK50 is not in a disabled state.
NTBK50 PRI circuit card is in an active
state.
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.
NTBK50 2.0 Mb PRI is in loop-back
mode.
NTBK50 2.0 Mb PRI is not in loop-back
mode