EOTec 2104 User Manual
General Features and Capabilities
100BaseFX (Multimode and Single-mode) Fiber Optic Port
The fiber optic ports found on some models are classified as 100BaseFX and support
100 Mbps operation. Both multimode and single-mode models are available. Multimode
accommodates multiple wavelengths over a cable with a typical core diameter of 50 or
62.5 microns. The maximum distance for multimode is up to 2 km. Single-mode uses a
single wavelength and cable core diameter of around 9 microns, which allows for a
maximum distance of 40 km (long haul models) or more (contact your switch vendor for
longer distances).
2K MAC Addresses with Automatic Learning, Aging, and Migration
Each Ethernet device inserts its unique Media Access Control (MAC) address into each
message it sends out. The port on the switch used for a given MAC address is
automatically learned when a frame is received from that address. Once an address is
learned, the switch will route messages to only the appropriate port, instead of
broadcasting messages out all ports like a hub. A time stamp is also placed in memory
when a new address is learned. This time stamp is used with the aging feature, which
removes unused MAC addresses from the table after 300 seconds. If a device moves,
the associated port on the switch is changed (migrated) as needed.
3.2 Gbps Bandwidth
The fast Ethernet switches have 3.2 Gbps. This means they can support full duplex
communications on all ports at the same time.
Auto-crossover (Auto-MDI/MDIX)
The RJ45 ports of the EOTec 2104 Ethernet Ring Switch automatically detect the cable
type (straight-through vs. cross-wired) and re-configure themselves accordingly.
Auto-polarity
The auto-polarity feature corrects reversed polarity on transmit and receive twisted pair.
Automatic Power Saving
If there is no cable on a port, most of the circuitry for that port is disabled to save power.
Auto-sensing Speed and Flow Control
The RJ45 ports of the EOTec 2104 Ethernet Ring Switch will auto-negotiate with the
connected device to determine the optimal speed and flow control for each port.
Backplane
Each EOTec 2104 module has a backplane that can plug directly into other Weed
Instrument modules. This BUS interconnection is located on the side of each unit and
provides an additional Ethernet connection without the need of a cabled interface.
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