AT-3624TR/3648TR Installation Manual - Allied Telesis

CentreCOM 3600 Series Hub/Repeaters
Port Status Indicators
The port indicators on the AT-3600 Series hub front panels provide visual
diagnostic and activity information for network analysis.
The AT-3612T has a central bank of indicators, as shown in Figure 37.
PORT STATUS
No Link OFF
Link Green ON
Receiving Green FLASHING
1 3
PORT ACTIVITY
INDICATOR STATUS
5 7
Partitioned
Collision
Amber ON
Amber FLASHING
9 11
2 4
6 8
10 12
Figure 37: AT-3612T Port LEDs
Each 10BASE-T port supports the following indicator functions with one
dual-color front panel LED per port. Note that the LEDs do not reflect
real-time activity because a data packet is too fast for the human eye to
distinguish on the LED indicator; therefore, the hub artificially stretches
the LED ON time for easier observation.
LINK (Steady Green)—This indicates that the particular port has a valid
link and is not partitioned.
RECEIVING (Flashing Green)—When a port’s LED is blinking, the port
is receiving Ethernet packets.
PARTITIONED (Steady Amber)—A steady amber port indicator means
the port is partitioned or segmented from the rest of the ports. This
partitioning may be associated with a management function or with an
error condition on the link.
COLLISION (Flashing Amber)—A momentary amber flash occurs when
a collision is detected on the port.
NO LINK (No Light)—If the Link Test function is not met by the
10BASE-T device at the opposite end of the UTP segment, this LED will
not illuminate. This may occur if the workstation at the end of the
segment is turned off or if the UTP segment is disrupted or damaged.
37