Nortel Networks AN/DC manual ANH-8/DC Front-Panel LEDs

			Operating the AN/DC and ANH-8/DC
Table 4-3.	ANH-8/DC Front-Panel LEDs (continued)
LED Label		Color	Meaning
AUI Part		Amber	Lights to indicate that the AUI port has been
(Partition)			partitioned from the repeater due to a disruption in
			transmission. Autopartitioning occurs after an
			excessive number of consecutive collisions or an
			excessively long single-collision signal.
DCD1 (Data Carrier		Green	Lights to indicate that the first synchronous port
Detect 1)			(COM1) is active.
DCD2 (Data Carrier		Green	Lights to indicate that the second synchronous port
Detect 2)			(COM2) is active.
<LAN>		Green	Lights after each data transmission to indicate data
			present in the repeater. The signal is longer than the
			duration of data, allowing the eye to perceive the
			occurrence of very short transmissions. The LED may
			appear to flicker during numerous transmissions.
Col		Amber	Lights to indicate a collision in the AUI repeater.
(Collision)

Back-Panel LEDs

Figure 4-3 illustrates the back-panel LEDs for the ISDN and Second Ethernet options. These LEDs are visible after installing either an ISDN BR Interface or Second Ethernet Interface upgrade module.

-48VDC

-60VDC

1.5A

RTN -VDC

ISDN-BRI

COM 3/Expansion COM 2 COM 1

TX

RX

UTP-2 COL

1 LED 3 LEDs

AN0059B

Figure 4-3. ANH-8/DC Back-Panel LEDs

312410-A Rev 00 4-7