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EtherFast
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16-Port and 24-Port 10/100 Ethernet Switches
9
Instant EtherFast
®
Series
8
Appendix A: Fiber Optic Modules
(models EF3116 & EF3124 ONLY)
Some Ethernet Switches are equipped with an expansion port for adding
optional fiber optic expansion modules.
The 100BaseFX Fiber Modules allow you to connect the Ethernet Switch to
other switches, hubs, or routers in fiber optic network backbones. These mod-
ules use high-bandwidth, multimode fiber optic cabling with SC type connec-
tors.
Fiber cabling can transmit your Switch’s data up to 2000 meters (6560 feet) away
to another switch without requiring signal regeneration. The 100BaseFX SC
Fiber Module (model number EF31SC) is available through your Linksys dealer.
To install a fiber module into the Ethernet Switch’s expansion port, follow
these instructions:
1. Before installing the fiber optic module, you must first power off the
Switch by removing the AC power cord. If the Switch is rack mounted, you
should remove the Switch from the rack temporarily until the fiber optic
module is installed.
2. Remove the faceplate from the unit by loosening the screws on either side
with a screwdriver. Remove the expansion module from its packaging.
Keep the screws for securing the fiber module to the Switch in step 4.
3. Slide your fiber expansion module into the Switch. The module should fit
snugly into the Switch’s expansion port.
4. Secure the fiber module with the screws from the faceplate. You may now
remount the Switch into its rack if needed, then reconnect the AC power cable
to power on the Switch and resume normal operation.
5. Install your multimode fiber optic cabling from the module.
Use the guidelines below to plan the layout of your network with other fiber-
equipped devices from your Switch’s 100BaseFX fiber module.
* A distance extender has an internal switch, whereas a transceiver does not.
Switches generally use distance extenders, and hubs utilize both types of modules.
100BaseFX Fiber Cabling Distance Limitations
From
The Ethernet
Switch
To
Maximum Distance
2000 meters (6560 feet)
208 meters (682 feet)
Switch or
Distance
Extender
Fiber
Transceiver
Duplex
Full
Half
Half only*
412 meters (1350 feet)
Introduction
Installing a Fiber Optic Expansion Module
Important: Fiber Optic Modules will only function with model
numbers: EF3116 and EF3124. If you are not sure of the Switch’s
model number, make sure there is a fiber optic module port in the
front of the Switch. If it does not have a fiber optic module port, your
Switch will not function with Fiber Optic Modules.
NNoottee::
The Switch’s fiber module
will not run with Gigabit devices.