Power requirements – Nortel Networks Circuit Card User Manual
Page 828
Page 828 of 906
NTRB21 DTI/PRI/DCH TMDI card
553-3001-211 Standard 3.00 August 2005
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 262.
shows the faceplate of the NTRB21 TMDI card.
Power requirements
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.
Table 262
NTRB21 LED states
LED
State
Definition
DIS
On (Red)
The NTRB21 circuit card is disabled.
Off
The NTRB21 is not in a disabled state.
ACT
On (Green)
The NTRB21 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.
RED
On (Red)
A red-alarm state has been detected.
Off
No red alarm.
YEL
On (Yellow)
A yellow alarm state has been detected.
Off
No yellow alarm.
LBK
On (Green)
NTRB21 is in loop-back mode.
Off
NTRB21 is not in loop-back mode.