Nortel Networks AN/DC ユーザーズマニュアル
Operating the AN/DC and ANH-8/DC
312410-A Rev 00
4-7
Back-Panel LEDs
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.
Second Ethernet Interface upgrade module.
Figure 4-3.
ANH-8/DC Back-Panel LEDs
AUI Part
(Partition)
(Partition)
Amber
Lights to indicate that the AUI port has been
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.
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
Detect 1)
Detect 1)
Green
Lights to indicate that the first synchronous port
(COM1) is active.
(COM1) is active.
DCD2 (Data Carrier
Detect 2)
Detect 2)
Green
Lights to indicate that the second synchronous port
(COM2) is active.
(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.
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
(Collision)
(Collision)
Amber
Lights to indicate a collision in the AUI repeater.
Table 4-3.
ANH-8/DC Front-Panel LEDs
(continued)
LED Label
Color
Meaning
COM 1
COM 2
COM 3/Expansion
ISDN-BRI
3 LEDs
1 LED
UTP-2
TX
RX
COL
RX
COL
AN0059B
RTN -VDC
-48VDC
-60VDC
1.5A