Black Box Modular Switches Manual De Usuario

Black Box Modular Switches           

        Installation and User Guide (8/99) 

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.2.4 

 

Black Box LE14XXA-Series  Modular Switches offer high performance and flexibility, 

and are easily used in a variety of applications including client/server computing, performance 

upgrades of departmental networks, and collapsed backbone applications. The Dual-Speed 

characteristic of the LE14XXA-Series Switches enables them to inter-connect a series of subnets 

(one subnet per LE14XXA-Series Switch) in a LAN traffic center. The subnet connections may 

be via either fiber or twisted pair cabling, and may be 100Mbps or 10 Mbps speed and full-or 

half-duplex mode.   

 

The mixed-media capability is ideal for upgrading existing Ethernet LAN networks, 

where existing cabling must be accommodated. The fiber-built-in media capability is ideal for 

integrating future-proof fiber cabling into the LAN structure. 

Example 1 :  LE1401A 

In a typical 10 Mb network performance upgrade, some existing cascaded 10 Mbps 

hubs connect a group of users who share one 10 Mb traffic domain. The LE1401A 4port Series 

Switch provides eight 10/100Mb traffic domains for increased performance. It can segment 10 

Mbps and 100Mbps units, hubs and servers, in the existing network into multiple domains, 

providing greatly increased bandwidth. In this case, two 100Mb fiber connections are required to 

connect to more distant LAN centers, and a configuration with two “combo” 3@RJ-45 + 

1@fiber-built-in 4PMs is used. 

The LE1401A provides complete network connectivity so that all 10 Mb and 100Mb 

nodes operate in a unified manner, functioning as one plug-and-play switched network facility.  

It filters and forwards packets from one segment to another, containing the local traffic and 

allowing only the packets which need to be forwarded to go outside to the appropriate other 

segments. This is ideal for a central departmental switch in a high-performance LAN center. 

Figure 2.4 illustrates this example. 

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