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Fiber Uplink Port 

The LED indicator for the fiber uplink port is located on the RJ-45 connector of the 
downlink port next to the power connector.  There are four LED functions for the 

fiber uplink port.   
The fiber uplink port LED functions are as follows: 

 

Glows green when a link is established on the fiber port. 

 

Glows green indicating a valid link, then blinks green when activity is detected 

on the fiber port. 

 

When the LED is OFF, there is no link (check cabling, check remote device). 

 

Blinking LED - indicates the device attached to the other end of the fiber 

maybe passing Link Fault Propagation, or generating noise onto the fiber.  This 

normally happens when there is a media converter at the fiber end of the link.  
Connect the second port of the converter onto a valid device to generate link. 

Twisted Pair Uplink Port 

When the Access Converter/3 is configured with a twisted pair uplink port, the LED 
location and functionality is the same as that for the downlink ports. 
 

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ABOUT THE ACCESS CONVERTER/3 

The Access Converter/3 is a 10/100 auto-negotiating, switching, optical access 

product.  There is one uplink port and three 10/100 twisted pair downlink ports.  

The uplink port can be either fiber or 10/100 twisted pair.  The uplink port is 
located on the back of the media converter.  Each of the twisted pair ports can 

auto-sense the speed and duplex mode of a connected device.  These speeds 

include the following: 

 

10 Mbps 

 

100 Mbps 

 

Half Duplex 

 

Full Duplex  

All of these speeds include Flow Control.  The fiber port always operates at 100 

Mbps Full Duplex. 
The Access Converter/3 offers plug-and-play operation, including the AutoCross 
feature which automatically selects between a crossover work-station or straight-

through repeater hub connection depending on the connected device. 
The Access Converter/3 also protects against Broadcast storms, and allows packets 
of up to 1916 bytes to pass.  The Access Converter/3 uses a universal external 

switching power adapter for 100 to 240 ±10% VAC input and 5 VDC output 

(included).  
 

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