Specifications

TurboStack Series Hubs
35
LED Displays
Hub Indicators LED indicators appear on each AT-TS24TS hub, as shown in Figure 25.
The LEDs on the AT-TS24TS hub intentionally 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 observation. LED indicators for the AT-TS24TS hub are
described below:
POWER—Green whenever power is applied.
FAULT (OFF under normal operational conditions)—Stays red for a very
short time at power-up; remains solid red if a malfunction is detected
during the diagnostics.
ACTIVITY—The Activity indicator will flash when Ethernet packets are
being transmitted to all hub ports.
Port Indicators The AT-TS24TS port indicators are located on the hubs’ front panel. They
provide visual diagnostic and activity information for network analysis.
Each 10BASE-T port supports the following indicator functions with one
two-color front panel LED per port:
LINK (Solid 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 (Solid Amber)—A solid amber port indicator means the
port is partitioned or segmented from the rest of the ports. This may occur
by a management function or by an error condition on the link.
Figure 25: AT-TS24TS LEDs
Hub status LEDs
Port activity LEDs
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