Nortel Networks 553-3001-211 manual On page 817 shows the faceplate of the NTRB21 Tmdi card

Page 816 of 894 NTRB21 DTI/PRI/DCH TMDI card

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 257.

Table 257

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.

Figure 174 on page 817 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.

553-3001-211 Standard 2.00 September 2004