Owner's manual

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Omnitron Systems Technology, Inc. 1

27 Mauchly #201, Irvine, CA 92618 (714) 250-6510 Fax: (714) 250-6514

FlexCenter

™

Flexible Workgroup Ethernet Hub

User Manual

12 Omnitron Systems Technology, Inc.

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Summary of content (6 pages)

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2 Omnitron Systems Technology, Inc.
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Omnitron Systems Technology, Inc. Safety Considerations Omnitron Systems Technology, Inc. 11 SPECIFICATIONS Warning The operating description in this Instruction Manual is for use by qualified personnel only. To avoid electrical shock, do not perform any servicing of this unit other than that contained in the operating instructions, unless you are qualified and certified to do so by Omnitron Systems Technology, Inc. Caution All user-required operations can be performed without opening the unit.
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10 Omnitron Systems Technology, Inc. Omnitron Systems Technology, Inc. Application 6. Multiple fiber backbone This case depicts three 10Base-T hubs interconnected using two fiber segments. The collision rule is met (4-3-0) while restricting each fiber segment to 500 m. A detailed calculation reveals (not provided here) that a total budget of 3,250 m of fiber is available which would allow for instance for one of the fibers to be at 2 km while the other could be 1,250 m.
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Omnitron Systems Technology, Inc. Omnitron Systems Technology, Inc. 9 The fiber modules feature ST fiber connections and provide “Link” activity LED, “Receiving” LED and a “Partition” LED. The coax module features a coax BNC connector and provides “Receiving” and “Partitioned” LED displays. It also provides a switch selectable termination element which eliminates the need for an external termination resistor when connecting at the end of a coax line.
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8 Omnitron Systems Technology, Inc. Application 2. Midsize workgroup with fiber workstations In this case two hubs are connected via uplink cables to a third hub. Six workstations are connected via fiber to the hubs. The longest collision path is between two stations connected to each of the lower hubs. In this case there are 4 segments, 3 repeaters and 0 shared segments (4-3-0). Therefore, limiting the fiber runs to 400 m satisfies the collision rule's requirements. Omnitron Systems Technology, Inc.
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Omnitron Systems Technology, Inc. Omnitron Systems Technology, Inc. INVENTORY APPLICATIONS Review content; the following items should be included: The 5-4-3 Collision Rule 7 Please note any missing items or discrepancies and report them immediately. Collisions are an inherent part of Ethernet. Since a sending station may transmit at any time, its transmission may collide with transmissions from other stations.