Accton Technology CheetahSwitch Workgroup-3024 Quick Installation Manual - page 5
Quick Installation Guide
CheetahSwitch Workgroup-3024
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5
3. Connect one end of the cable to an MDI port on the switch, and the other end to any
MDI-X station port on the other device. When inserting an RJ-45 plug, be sure the tab
on the plug clicks into position to ensure that it is properly seated.
Notes: 1. Alternatively, you can connect from an MDI-X port on the switch to an MDI
daisy-chain port on the other device.
2. Make sure each twisted-pair cable does not exceed 100 meters (328 feet).
3. To connect to another switch or hub, you may also attach to (MDI-X) station
ports at both ends if you use crossover cabling.
Restrictions on Cascade Length - The IEEE 802.3 standard recommends restricting
the number of hubs (i.e., repeaters) cascaded via twisted-pair cable to 4; while IEEE
802.3u provides even stricter recommendations for Fast Ethernet. Therefore, when
cascading devices other than this switch, please refer to the accompanying
documentation for cascade restrictions. However, note that because switches break
up the path for connected devices into separate collision domains, you should not
include the switch or connected cabling in your calculations for cascade length
involving other devices.
Making a Connection via a Fiber Optic Port
If you need to connect fiber cable to the switch, several different 100BASE-FX
expansion modules are available that support either SC and ST type connectors. Note
that all fiber optic ports operate at 100 Mbps, and are configurable to full or half duplex.
Prepare fiber optic cable with SC or ST connectors at both ends. When connecting the
module directly to an end-node device (e.g., a workstation or file server), run cable from
the Rx (Tx) port on the module to the Tx (Rx) port on the target device. When inserting
the cable, be sure the tab on the plug clicks into position to ensure that it is properly
seated. When using full duplex, you can run a fiber optic link up to 2 kilometers (1.24
miles). However, when using half duplex, you can only run a link up to 412 meters
(0.25 miles).
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The 4-port expansion modules are not hot-swappable. Be sure you power off the
switch before installing any of these modules.
Distance Limit in Fiber Optics
Note that as a general rule, the length of fiber optic cable for a single switched link
should not exceed 2 kilometers (1.24 miles). However, timing constraints must also be
considered when calculating the maximum cable length for your specific environment.
Collision Domain Timing Constraints - Where fiber optic cable and twisted-pair
links exist in a single collision domain with other repeater devices, the fiber length has to
be limited to satisfy Fast Ethernet timing constraints. Use the following table as a guide
for maximum fiber length with the listed topologies (IEEE802.3u).
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Powering On the Switch
1. Plug the power cord into the power socket at the rear of the switch, and the other
end into a power outlet.
2. Check the LED marked PWR on the front panel to see if it is on. The unit will
automatically select the setting that matches the connected input voltage. Therefore,
no additional adjustments are necessary when connecting it to any input voltage
within the range marked on the rear panel.
3. The switch performs a self-diagnostic test upon power-on. (Note that this test takes
about 10 seconds to complete.)
Notes: 1. The unit supports a "hot remove" feature which permits you to connect/
disconnect RJ-45 or fiber optic cables without powering off the switch and
without disrupting the operation of the devices attached to the switch.
2. However, the optional slide-in modules are not hot-swappable. Be sure the
switch is powered off when installing or removing these modules.
Verifying Port Status
Check each connection by viewing the port status indicators shown in the following
figure and table.
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Verifying System Operation
Verify that all attached devices have a valid connection. The switch monitors the link
status for each port. If any device is properly connected to the switch and transmitting
a link beat signal, the Link indicator will light up for the corresponding port. If the Link
indicator fails to light when you connect a device to the switch, check the following items:
Both sides of each connection must use the same transmission mode (i.e., half or full
duplex). If any device connected to an RJ-45 port must operate at full duplex, be sure
it supports auto-negotiation. If it does not, then manually set the communication mode
for the switch port using the Configure button or a console connection.