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EDS Device Servers User Guide 
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2: Introduction 
This chapter introduces the Lantronix EDS family of device servers. It provides an 
overview of the products, lists their key features, and describes the applications for which 
they are suited. 
EDS is a unique, hybrid Ethernet terminal and multi-port device server product designed 
to remotely access and manage virtually all of your IT/networking equipment and servers, 
as well as edge devices such as medical equipment, kiosks, POS/retail terminals, 
security equipment and much more.  
EDS device servers contain all the components necessary to deliver full network 
connectivity to virtually any kind of serial device, a reliable TCP/IP protocol stack, and a 
variety of remote management capabilities. They boast an innovative design and run on 
Lantronix’s leading-edge Evolution OS™, our powerful real-time networking operating 
system that delivers an unprecedented level of intelligence and security to networked 
equipment.  
Delivering a data center-grade, programmable device computing and networking platform 
for integrating “edge” equipment into the enterprise network, rack-mountable EDS models 
are available in 8, 16, and 32 port configurations. 
EDS4100 Overview 
The EDS4100 is a compact, easy-to-use device server that gives you the ability to 
network-enable asynchronous RS-232 and RS-422/485 serial devices. It can deliver fully 
transparent RS-232/422 point-to-point connections and RS-485 multi-drop connections 
without requiring modifications to existing software or hardware components in your 
application.  
Note:
  RS-485 circuits support 32 full-load devices or 128 quarter-load devices. 
Each EDS4100 RS-485 port, however, counts as one device, leaving up to 31 
full-load or 127 quarter-load devices that can be connected to the RS-485 circuit. 
The EDS4100 device server supports the Power-over-Ethernet (PoE) standard. 
With PoE, power is supplied to the EDS over the Ethernet cable, by either an 
Ethernet switch or a midspan device. Being able to draw power through the 
Ethernet cable eliminates power supply and cord clutter. It also allows the EDS to 
be located in areas where power is not typically available. 
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Ports 1 through 4 support RS-232 devices. 
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Ports 1 and 3 also support RS-422/485 devices.