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AT-8500 Series Layer 2+ Fast Ethernet Switches Installation Guide
35
are defined in Table 7.
Note
The AT-8516F/SC switch does not have an LED Mode Select
button.
GBIC and SFP
Expansion Slot
LEDs
The GBIC and SFP slots on the AT-8550GB and AT-8550SP switches,
respectively, have two LEDs. The LEDs display the operating status of the
fiber optic port. Use the Mode Select button on the switch to toggle the
status information displayed by the MODE LED. The LEDs are defined in
Table 8.
Table 7. LEDs for the Fiber Optic Ports on the AT-8516F/SC Switch
LED State Description
L/A OFF Indicates no link has been established between
the port and the end node.
Green Indicates a valid link exists between the port
and the end node.
Flashing
Green
Indicates that the port is transmitting and/or
receiving data packets.
D/C Green Indicates that the port is operating in full-duplex
mode.
Amber Indicates that the port is operating in half-duplex
mode.
Flashing
Amber
Indicates that data collisions are occurring on
the port.
Table 8. LEDs for the Optional GBIC and SFP Ports on an AT-8550GB and
AT-8550SP Switches
LED State Description
LINK OFF Indicates that there is no link between the
port and the end node.
Solid
Green
Indicates a valid link has been established
between the port and the end node.
Mode - COL OFF Indicates that no data collisions are
occurring on the port.
Flashing
Green
Indicates that data collisions are occurring
on the port.