2 Port RS232 Serial over IP Ethernet Device Server

Connect to, configure and remotely manage two RS-232 serial device over an IP network

Product ID: NETRS232_2GB

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  • Browser based configuration of network settings, serial port line settings, UART transmit and receive buffer trigger levels and serial port flow control
  • Comes complete with Ether Link Manager software making serial device configuration easy
  • Data transfer rates of up to 115.2 Kb/sec per port

This two port Ethernet-to-Remote Serial interface converter, lets you install RS 232 serial devices anywhere on your TCP/IP Ethernet WAN/LAN, and your serial devices will perform as if they were right beside you - even over the Internet!

Even at the longest distances, control of your serial devices will be right at your fingertips: the remote serial ports appear alongside your local serial ports in your Windows device manager.

The Serial Ethernet IP Adapter (Device Server, Console Server) is designed to function seamlessly with your other serial ports for totally transparent operation. Your serial equipment – card scanners, access keypads, bar code scanners, and more – will operate as smoothly as if the serial ports were right inside your computer.

For industrial automation, security, Point of Sale, or any time you need reliable, long-range serial communications, this converter will deliver superior performance in any environment.


  • Environmental Control (lighting, temperature, clocks)
  • Hospital (monitoring equipment, nurses' stations)
  • Hospitality/Restaurant (credit card/debit card reader, serial printers)
  • Hotel Front Desk (serial printers, bar code scanners, keyboard, mouse, receipt printer, credit/debit card reader)
  • Manufacturing (CNC machinery, process control equipment, bar code scanners, serial printers)
  • POS (credit/debit card readers, receipt printers, bar code scanners, cash registers, scales)
  • Security (UPS control, access key panels, video cameras, card readers)

The StarTech.com Advantage

  • Add two network-enabled RS-232 Serial port to any Ethernet network
  • Allows several users share a serial device
  • No need to setup numerous and costly dedicated serial device servers, manage serial devices from a single PC
  • Operates seamlessly with built-in serial ports, the remote serial ports appear alongside other serial ports in your Windows device manager
  • Works over the Internet!

Partner Numbers

  • UPC 065030810975


  • Windows 7 logo
  • Windows 8 logo
  • Windows 10 logo
  • Windows 11 logo
Windows® 11, 10 (32/64), 8 / 8.1 (32/64), 7 (32/64), XP (32), 2000 (32)
Windows Server® 2008 R2


Warranty Information Warranty 2 Years
Connector(s) 1 - Connector Type(s) RJ-45
2 - Connector Type(s) DB-9 (9 pin, D-Sub)
Environmental Operating Temperature 0° to 70° C
Hardware Industry Standards HTTP
Packaging Information Package Length 15 cm [5.9 in]
Package Width 18 cm [7.1 in]
Package Height 80 mm [3.1 in]
Shipping (Package) Weight 0.7 kg [1.5 lb]
Performance Maximum Data Transfer Rate 115.2 Kbps
Physical Characteristics Color Beige
Product Length 95 mm [3.7 in]
Product Width 13 cm [5.1 in]
Product Height 4 cm [1.6 in]
Weight of Product 227 g [8.0 oz]
Power Power Source AC Adapter Included
Output Voltage 12V DC
Output Current 200 mA
Center Tip Polarity Positive
Software OS Compatibility Windows® 11, 10 (32/64), 8 / 8.1 (32/64), 7 (32/64), XP (32), 2000 (32)
Windows Server® 2008 R2
Special Notes / Requirements Note All modes other than Driver Mode operate independently of the operating system
What's in the Box 1 - Included in Package 2 Port Serial over IP converter
Power Adapter
Instruction Manual


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Product Support

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We are always ready to assist you with any questions you may have.

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Frequently Asked Questions


This device's default static IP address is

When experiencing either issue, complete the following:

  1. Close the IP-Extender Manager software.
  2. Right-click on the IP-Extender Manager icon and click Properties.
  3. Click the Compatibility tab.
  4. Select the Run this program as an administrator check box.
  5. Click Apply and OK.
  6. Relaunch the software.

There are several different ways that you can reset these devices to the factory settings. The following steps list the methods in order of easiest to hardest to perform.

Use the included software

  1. Open IP-Extender Manager.
  2. Right-click the serial over IP device and click Advanced.
  3. Click Restore Defaults.

Use the web interface

  1. To log into the web interface for the unit, type its IP address into a web browser and enter the password. By default, the password is admin.
  2. Click Network Settings.
  3. Click Restore factory defaults and reboot device.

Note: You can reset individual ports by going into Port Configuration and clicking the Reset button underneath Port Reset.

Reset the hardware

  1. Disconnect all of the cables from the serial over IP device. There should not be anything plugged into it.
  2. Remove the four screws from the bottom of the unit.
  3. Remove the cover.
  4. Short J15 (located near the Ethernet connection) with a jumper.
  5. Reconnect the Ethernet cable.
  6. Reconnect the power cable.
  7. The orange light on the Ethernet connection will illuminate and the green light will stay dark.
  8. When the green light comes on, the hard reset procedure is complete.
  9. Disconnect both cables from the serial over IP device.
  10. Remove the jumper from J15.
  11. Replace the cover.
  12. Replace the four screws.
  1. Make sure that the serial device is on the same network as your computer.
  2. In an Internet browser, enter the IP address of the unit. The default IP address is
  3. In the password field, enter the password. The default password is admin.
  4. Click Configure.

This is normal behavior. The software says connecting when data is being transferred. When data is not being transferred, the software says disconnected. The disconnected message does not mean that the device is not working.

If you are experiencing any issues in Windows 8 with the IP-Extender Manager software, complete the following:

  1. Right-click on the IP-Extender Manager software and click Properties.
  2. Click the Compatibility tab.
  3. Choose to Run this software in compatibility mode for Windows 7.
  4. Select the Run this program as an administrator check box.
  5. Click Apply and OK.

You should not upgrade your device's firmware if you do not have any issues with the functionality of your device. The only time you should consider an upgrade is if you are experiencing a problem with the device, and you have confirmed that the firmware addresses this problem.  You can confirm this is the case by reviewing the documentation included with the firmware or by consulting with our Technical Support team. Incorrectly upgrading firmware can result in diminished performance so it is best to contact StarTech.com if you would like to perform this operation.

Before You Buy

Virtual COM port

One of the most common applications of a network serial device is to use it to make a standard serial device accessible on a network. To do this, you need to connect a standard serial device to the DB-9 port on the network serial device. Next you need to connect the network serial device to a TCP/IP network using an Ethernet connection, and then install software on a client machine in order to access the network serial device. The software on the client machine communicates with the network serial device and creates (maps) a virtual COM port on your computer system. The virtual COM port is identical to a physical COM port and can be used in the same way.

Serial IP extender

You can use two network serial devices to extend a serial connection over a TCP/IP network. To do this, you need to configure one serial device as a client and the other as a server. The client and server are configured to transmit and receive data to their respective IP addresses and TCP ports. The serial settings must match for all connected serial devices, including the UART on both units. Depending on the serial device that you are using, you can use the provided software or the web interface to set the configurations.

UDP to serial adapter

You can use a network serial device to translate UDP data to a standard serial connection. The serial device is configured to listen for UDP traffic from specific IP addresses and ports, and will asynchronously transmit the data out of the serial port on the device. To do this, you need to configure UART on the network serial device to match the specifications of the serial receiver.

Compliance and safety

Compliance letters

Safety Measures

  • If product has an exposed circuit board, do not touch the product under power.
  • If Class 1 Laser Product. Laser radiation is present when the system is open.
  • Wiring terminations should not be made with the product and/or electric lines under power.
  • Product installation and/or mounting should be completed by a certified professional as per the local safety and building code guidelines.
  • Cables (including power and charging cables) should be placed and routed to avoid creating electric, tripping or safety hazards.
*Product appearance and specifications are subject to change without notice.

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