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Shared Serial Ports
Share real serial port in your system

Shared Serial Ports ensures simultaneous, high-speed, bi-directional and collision-free connection to RS232 serial port for unlimited number of applications. All applications that connect to shared COM port will be able to communicate (send and receive data) with the device which is attached to real port as if they had an exclusive access to that device. As a result, Shared Serial Ports application lets you bypass one-application-per-one-serial-port limitation and provide certain applications with custom access rights. If you would like to implement Shared Serial Ports' great functionality into your software, OEM license will provide you with all rights needed for that.


This product is one of the three products that merged into one to provide you with the utmost functionality. This new powerful product is: Serial Splitter 5

With Shared Serial Ports you can:

  • Share one port for many applications

    Shared Serial Ports creates any number of virtual copies of a real RS232 serial port and invisibly gives them the same names. For example, you share your COM1 port with Shared Serial Ports. Thus, you will have any number of COM1 ports in your system, which serve as common physical ports to all applications and ensure precise data transmission from a serial device to all applications.
  • Make several applications control shared serial port

    Shared Serial Ports provides you with the ability to open one COM port by several applications. All of these applications are shown in the Applications list, where you can add/remove them and set specific access permissions, such as read, write and control. Read and write permissions are set by default, meaning that applications will be able to read from and write to real serial port, but will not be able to change its control lines states. By enabling control rights, you give the right to change control line states to the specified application.
  • Control serial port signal lines

    Virtual ports, created by Shared Serial Ports emulate and support all hardware signal lines (DTR/DSR, RTS/CTS, RING, ERROR, DCD, etc.). As in real null-modem connection, DTR of the local port is connected to DSR and DCD of the remote port, and RTS of the local port is connected to CTS of the remote port.

Shared Serial Ports Licenses

Whether you're looking at redistributing our Shared Serial Ports technology as a part of your product or considering Shared Serial Ports software for an enterprise-wide deployment, we offer flexible and affordable corporate solutions designed to meet your needs.

OEM License

for Shared Serial Ports

Why OEM?

OEM License permits you to embed Shared Serial Ports technology into your own software or hardware products.

OEM license grants you the right for unlimited redistribution of Shared Serial Ports as an integral part of your software. OEM license is royalty-free one-time purchase.

Purchasing the OEM license you get:

  • Special setup file for OEM version installation
  • OEM license key generated for your company's name which can be used in all of your offices world-wide
  • The ability of royalty-free silent installation and registration on users' machines
  • OEM User Guide with instructions on integrating the OEM into your product
  • Supported IDEs

OEM For Developers
Sign up for the API evaluation program and integrate it into your product.

Source Code License

for Shared Serial Ports
Ordering Source Code license for Shared Serial Ports you receive all extensively commented programming source code (GUI sources are not included). In addition, we provide technical and information lifetime support by email, IMs and phone, and high-end consulting services. Our leading developers will help you implement Source codes and understand the advanced part of the product.

Site Licensing

Unlimited Site License grants you the right to install and utilize Shared Serial Ports application with GUI on unlimited number of computers by all employees of your company worldwide. It is the ideal solution if your company has representation offices in different parts of the world.

If you know the certain number of computers to be equipped with Shared Serial Ports you may consider obtaining Limited Site License. The advantage of Site Licensing comparing to multiple Single licenses is one license key for all company computers.

Full features list

Provide simultaneous access to a single serial port for multiple applications
Unlimited number of applications are able to work with one device (serial port) simultaneously
Flexible access policy for each application (read/write to serial port; manage control lines)
Useful on-screen visualization of shared serial ports, connected applications and communication activity (sent/received bytes, status, etc.)
RS232 specification standard compliant
Customize real serial port connection parameters (baudrate, parity, flow-control, databits and stopbits)
Bidirectional data transfer
Unique sharing technology
Completely transparent operation
Fully compatible with Windows 2000/XP/2003/Vista

What customers say

  • I'm using Serial Port Splitter to finish my graduating project. I am developing a software to control some sensors on cereal harvester.
    André Frederico Lucas da Silva

Let's get started

Shared Serial Ports for Windows
Demo version limitations
• 14-day trial period
System Requirements
Windows 2000
Windows XP (32-bit and 64-bit)
Windows 2003 (32-bit and 64-bit)
Windows 2008 (32-bit and 64-bit)
Windows Vista (32-bit and 64-bit)
Latest Update
Version (12th May, 2008) Release notes