NTAK102. 0 Mb DTI card Page469 of 544
Option11C and 11C Mini Technical Reference Guide
In general, 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•.
Table 1 47
NTAK10 LED states
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
Flashing
(Green)
The clock controller is switched on and locking onto the
primary reference
Off The clock controller is switched off
Note: See “Clock controller interface” on page474 in this
chapter for more on tracking and free-run operation.