Page 722 of 906 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 (Part1 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.