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Table 147
NTAK10 LED states
LED
DIS
OOS
On (Yellow)
NEA
On (Yellow)
FEA
On (Yellow)
LBK
On (Yellow)
CC
On (Green)
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 •.
State
On (Red)
The NTAK10 circuit card is disabled.
Off
The NTAK10 is not in a disabled state.
The NTAK10 is in an out of service state
Off
The NTAK10 is not in an out of service state
A near end alarm state has been detected
Off
No near end alarm
A far end alarm state has been detected
Off
No far end alarm
NTAK10 is in loop-back mode
Off
NTAK10 is not in loop-back mode
On (Red)
The clock controller is switched on and disabled
The clock controller is switched on and is either locked to a
reference or is in free-run mode
Flashing
The clock controller is switched on and locking onto the
(Green)
primary reference
Off
The clock controller is switched off
Note: See "Clock controller interface" on page 474 in this
chapter for more on tracking and free-run operation.
NTAK10 2.0 Mb DTI card
Definition
Option 11C and 11C Mini
Page 469 of 544
Technical Reference Guide
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