Omnitron Systems Technology FlexCenter 10 - Manual (Page 3)

Omnitron Systems Technology, Inc. 3
FlexCenter 10
Flexible Workgroup Ethernet Hub
User Manual
GENERAL DESCRIPTION
The FlexCenter 10 is a 12/24 port 10Base-T flexible workgroup Ethernet hub repeater. It
features two optional interface modules capable of uplink interface to multimode and
single-mode fiber or coax devices or hubs.
This User’s Manual describes the following models:
Model Description
4100 12 Port 10Base-T hub, rack-mountable.
4101 12 Port 10Base-T hub, stackable.
4102 24 Port 10Base-T hub, rack-mountable.
4103 24 Port 10Base-T hub, stackable.
The following modules are supported by the FlexCenter 10:
Model Description
4110 10Base-FL Fiber uplink module, multimode, 850nm.
4111 10Base-FL Fiber uplink module, single-mode, 1300nm.
4112 10Base-FL Fiber uplink module, multimode, 1300nm.
4120 10Base-2 Coax uplink module.
The FlexCeiver’s 12/24 RJ45 ports provide 10Base-T interface to category 3 or higher
unshielded twisted pair (UTP) wiring. Its fiber interface modules provide 10Base-FL
multimode and single-mode ST connectivity options for a variety of applications. Its
coax interface module provides BNC 10Base-2 interface capability.
Being a smart repeater, the FlexCenter monitors and reports port activity. It detects
operational devices connected and displays their connection via a per port green
“Activity” LED. When sensing received data, the “Activity” LED starts blinking. If a
port violates transmission rules, it is disconnected automatically (partitioned) and a
red “Partition” LED displays the error status. The port is reconnected only after
normal behavior is restored; at that time the LED is turned off.
The hub detects and corrects polarity reversals in UTP wiring. It also detects and
displays collisions using a yellow “Collision” LED. Jabber conditions are displayed
using a red “Jabber” LED.
The FlexCenter features a special uplink RJ45 connector. This uplink connector is
equipped with a cross-over switch that can switch between the receiving and
transmitting wire pairs. This feature eliminates the need for a “Crossed Cable”
which is otherwise required when connecting between hubs.
10 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.
Application 7. Switched fiber backbone
This application depicts a switched fiber backbone with the FlexCenter hubs and the
FlexPoint 10FL/T converters providing the fiber connectivity. Each "branch" segment
radiating from the switch is a separate "collision domain" and the collision rules apply
to each one independent of any other. Each one of the branching LANs meets the
collision rule (3-2-0).