Black Box Modular Switches Manual De Usuario

Black Box Modular Switches           

        Installation and User Guide (8/99) 

32 

nodes are added or removed or moved from one segment to another, the 4-Port Switch 

automatically keeps up with node locations.   

An address-aging algorithm causes least-used addresses to fall out in favor of new 

frequently-used addresses.  To reset the address buffer, cycle power down-and-up.  

  

PWR          :  Power LED, ON when AC power is applied to the unit.  

 

LK             :   Steady ON, Link status for 10 Mbps and 100Mbps operation.   
ACT          :  ON with port activity for 10 Mbps and 100Mbps operation.  

 

F/H            :  Full / Half duplex LED,  ON when the port is running full duplex, OFF 

for half duplex.  

100/10        : Speed LED, ON when the speed is 100Mbps , OFF when the     speed is 

10 Mbps  

4.3 

The unit has a manual Up-link 

push-button, located on the front panel next to 10/100Mb RJ-45 4-port # 1 which it controls.  It 

enables the port’s cable to either connect to a user station node (push in) or to be cascaded (push 

out) to a 10/100Mb repeater or switching hub in the network. Verify proper Up-link push-

button position by noting Port 1’s LK (link) LED status, which is illuminated when a proper 

link is made. 

 

Auto-negotiation, for Fast Ethernet copper ports 

 

The LE14XXA-Series Fast Ethernet copper ports can be set for either fixed 100Mb 

speed or for 10/100 F/H N-way auto-negotiation per the IEEE802.3u standard. The selection is 

made via an internal jumper (see Section 3.4 for jumper-setting instructions).  The factory default 

setting is for auto-negotiation.  At 100Mb-fixed speed, the user may select half- or full-duplex 

mode by internal jumpers for each RJ-45 port separately.  

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