Installation guide

AT-8000 Series Fast Ethernet Switches Installation Guide
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# If your network topology will contain a loop where two or more
network devices can communicate with each other over more
than one data path, do not connect the network cables forming
the loop until after you have activated the Spanning Tree Protocol
(STP) on the switch. Data loops can adversely affect network
performance. For instructions on how to activate STP, refer to the
AT-S39 Management Software User’s Guide.
# If you are creating a port trunk, do not connect the cables of the
trunk to the switch until you after have configured the trunk using
the switch’s management software. Connecting the trunk cables
to the switch before you have configured the software will result
in a data loop, which can adversely affect network performance.
For instructions on how to configure a port trunk, refer to the
AT-S39 Management Software User’s Guide.
4. If you installed a fiber optic or twisted pair expansion module or GBIC
module, connect the data cable to the port on the module.
5. Apply AC power to the switch by plugging the power cord into the AC
power connector on the back panel of the unit and plugging the
other end into a wall outlet.
Warning
The power cord is used as a disconnection device. To de-energize
equipment, disconnect the power cord. "10
As power is applied to the switch, the Fault LED (shown in Figure
37) flashes briefly as the switch loads its operating software. This
process takes only a few seconds. After the switch has finished
loadings its software, the Fault LED will stop flashing and remain
OFF.
Figure 37 Fault LED
Note
Refer to the section System LEDs on page 26 for information on
the system LEDs.
100
FULL
ACT
ERROR
LINK
PORT B
FAULT
MASTER
RS-232 TERMINAL PORT
PWR
MODE
RPS
Fault LED