Physical Description - Nortel Enterprise 1000 Reference Manual

Physical description

Table 36
NTBK50 faceplate LEDs (Part 1 of 2)
LED
OOS
ACT
RED
YEL
LBK
Succession Communication Server for Enterprise 1000 Circuit Card Reference Guide
• 32 software-selectable Tx and Rx Pad values
• conversion of PCM commanding Laws (A-A, u-u, A-u, u-A)
• Card-LAN for maintenance communications
The NTBK50 uses a standard 9.5" by 12.5" multi-layer printed circuit board.
The faceplate is 7/8" wide and contains seven LEDs.
The LEDs are described in Table 36.
State
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.
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.
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
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
On (Green) 2.0 Mb PRI is in loop-back mode.
Off 2.0 Mb PRI is not in loop-back mode.
NTBK50 2.0 Mb PRI card
Definition
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