Physical description – Nortel Networks Circuit Card User Manual
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NTAK10 2.0 Mb DTI card
553-3001-211 Standard 3.00 August 2005
Physical description
The 2 Mb DTI pack uses a standard 9.5" by 12.5", multi-layer printed circuit
board. The faceplate is 7/8” wide and contains six LEDs.
The LEDs operate as follows:
•
After the card is plugged in, the LEDs (a-e) are turned on by the
power-up circuit. The clock controller LED is independently controlled
by its own microprocessor.
•
After initialization, the LEDs (a-e) flash three times (0.5 seconds on,
0.5 seconds off) and then individual LEDs will go into appropriate states,
as shown in Table 234.
Table 234
NTAK10 LED states (Part 1 of 2)
LED
State
Definition
DIS
On (Red)
The NTAK10 circuit card is disabled.
Off
The NTAK10 is not in a disabled state.
OOS
On (Yellow)
The NTAK10 is in an out-of-service state.
Off
The NTAK10 is not in an out-of-service state.
NEA
On (Yellow)
A near end alarm state has been detected.
Off
No near end alarm.
FEA
On (Yellow)
A far end alarm state has been detected.
Off
No far end alarm.
LBK
On (Yellow)
NTAK10 is in loop-back mode.
Off
NTAK10 is not in loop-back mode.
CC
On (Red)
The clock controller is switched on and disabled.
On (Green)
The clock controller is switched on and is either locked to a
reference or is in free-run mode.