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Table 139
NTAK09 LED states
LED
DIS
On (Red)
ACT
On (Green)
RED
On (Red)
YEL
On (Yellow)
LBK
On (Green)
Power requirements
Foreign and surge voltage protection
In general, the first five LEDs operate as follows:
•
During system power up, the LEDs are on.
•
When the self-test is in progress, the LEDs flash on and off three times,
then go into their appropriate states, as shown in Table 139.
State
The NTAK09 circuit card is disabled.
Off
The NTAK09 is not in a disabled state.
The NTAK09 circuit card is in an active state. No alarm states
exist, the card is not disabled, nor is it in a loopback state.
Off
An alarm state or loopback state exists, or the card has been
disabled. See the other faceplate LEDs for more information.
A red-alarm state has been detected.
Off
No red alarm.
A yellow alarm state has been detected.
Off
No yellow alarm.
NTAK09 is in loop-back mode.
Off
NTAK09 is not in loop-back mode.
The DTI/PRI obtains its power from the backplane, and draws less than 2
amps on +5 V, 50 mA on +12 V and 50 mA on -12 V.
Lightning protectors must be installed between an external T-1 carrier facility
and the Option 11C cabinet. For public T-1 facilities, this protection is
provided by the local operating company. In a private T-1 facility
environment (a campus, for example), the NTAK92 protection assembly may
be used.
NTAK09 1.5 Mb DTI/PRI card
Definition
Option 11C and 11C Mini
Page 449 of 544
Technical Reference Guide
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