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IOLAN SDS/SCS/STS/MDC User’s Guide, Version 4.0
27
Introduction
Chapter 1
1
About the IOLAN
The IOLAN is an Ethernet communications/terminal server that allows serial devices to be connected 
directly to LANs. The IOLAN can connect to a wide range of devices including:
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Terminals for multi-user UNIX systems
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Data acquisition equipment (manufacturing, laboratory, scanners, etc.)
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Retail point-of-sale equipment (bar coding, registers, etc.)
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PCs using terminal emulation or SLIP/PPP
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Modems for remote access and Internet access
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ISDN adapters for branch remote access and Internet access
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All types of serial printers
The performance and flexibility of the IOLAN allows you to use a wide range of high speed devices 
in complex application environments. The IOLAN products will work in any server environment 
running TCP/UDP/IP.
IOLAN Family Models
The IOLAN comes in several different models to meet your network needs:
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DS—Offered as a 1-port unit (DB25M, DB25F, RJ45, and DB9M interfaces available), this 
model provides general IOLAN functionality and supports software configurable serial interface 
protocols EIA-232/422/485. 
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TS—This model is available with two serial ports (RJ45 only) and supports EIA-232 only. The 
TS model is similar to the DS model supporting only general IOLAN functionality.
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SDS—This model is available in both desktop and rack mount configurations. Both models 
support software configurable serial interface protocols EIA-232/422/485. The SDS model has 
the advanced secure IOLAN feature set in addition to the general IOLAN functionality.
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STS—This model comes in one desktop model and several rack mount configurations. All 
models support EIA-232 only. The STS model has the advanced secure IOLAN feature set in 
addition to the general IOLAN functionality.
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SCS—This model comes in several rack mount configurations. All models support EIA-232 
only and have an internal PCI card interface. The SCS model has the advanced secure IOLAN 
feature set in addition to the general IOLAN functionality.
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MDC—Offered as a 4-port and 8-port unit (RJ45 only), this model is a medical unit compliant 
with IEC 60601-1 and has galvanically isolated EIA-232 serial ports. The MDC model has the 
advanced secure IOLAN feature set in addition to the general IOLAN functionality. 
See 
 for information about the hardware specifications for your IOLAN model. 
See 
 for a list of the basic and advanced software features.