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Chapter 1: Overview
32
Table 5 describes the LEDs for the 10/100/1000Base-TX twisted pair
ports, Ports 49R and 50R, on the AT-8550GB and AT-8550SP switches.
Mode - 100
(AT-8524M)
OFF Indicates that the port is operating at 10
Mbps.
Green Indicates that the port is operating at 100
Mbps.
Mode - SPD
(AT-8550GB
and
AT-8550SP)
OFF Indicates that the port is operating at 10
Mbps.
Green Indicates that the port is operating at 100
Mbps.
Mode - FULL
(AT-8524M)
OFF Indicates that the port is operating in half-
duplex mode.
Green Indicates that the port is operating in full-
duplex mode.
MODE - FDX
AT-8550GB
and
AT-8550SP)
OFF Indicates that the port is operating in half-
duplex mode.
Green Indicates that the port is operating in full-
duplex mode.
Mode - ACT OFF Indicates that there is no activity on the port.
Flashing
Green
Indicates that the port is transmitting and/or
receiving data packets.
Table 5. LEDs for Ports 49R and 50R on the AT-8550GB and AT-8550SP
Switches
LED State Description
LINK OFF Indicates that there is no link between the
port and the end node.
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.
Table 4. LEDs for the 10/100Base-TX Twisted Pair Ports on the
AT-8524M, AT-8550GB, and AT-8550SP Switches (Continued)
LED State Description