Nortel Networks Circuit Card - Manual (Page 776)

Page 776 of 906 NTBK50 2.0 Mb PRI card
553-3001-211 Standard 3.00 August 2005
The LEDs are described in Table 249.
Table 249
NTBK50 faceplate LEDs (Part 1 of 2)
LED State Definition
OOS On (Red) The NTBK50 2.0 Mb PRI circuit card is disabled or
out-of-service. Also, the state of the card after power-up,
completion of self test, and exiting remote loopback.
Off The NTBK50 2.0 Mb PRI is not in a disabled state.
ACT On (Green) The NTBK50 2.0 Mb PRI circuit card is in an active state.
Off The NTBK50 2.0 Mb PRI is in a disabled state. The OOS
LED is red.
RED On (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).
Off No red (local) alarm.
YEL On (Yellow) 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).
Off No yellow (remote) alarm.
LBK On (Green) 2.0 Mb PRI is in loop-back mode.
Off 2.0 Mb PRI is not in loop-back mode.
CC On (Red) The clock controller is software disabled.
On (Green) The clock controller is enabled and is either locked to a
reference or is in free run mode.