Options for Network Serial Port Kit
Network Serial Port Kit
Network Serial Port Kit allows you to connect any serial port devices over the TCP/IP network or Internet. Creation of local virtual serial ports pairs are available as well.

Program creates up to 254 virtual serial ports at a time. Physical COM ports located on remote computer can be connected to host computer over the network as well. You can connect data collection serial devices: bar code scanners, modems, sensors, meters, gages, RF equipment, telephone PBX systems, laboratory or industrial instruments, and so on - to the serial ports of your computer to deliver that data anywhere over any TCP/IP based network.

For example you can convert usual PC to "Serial Port Server" so then you can connect any serial device directly to a TCP/IP network and communicate with that device from any other PC in the same network or across the Internet. This allows you to use existing Windows based serial communications software to send and receive data to remote serial device across a network.
Program details
Downloads month: 4
Company: FabulaTech Inc
Release date: 2008-12-02
Version: 5.5
License: Shareware
Price: $199.95
Supported OS': Windows NT 3.x, Windows NT 4.x, Windows 2000, Windows XP, Windows 2003
Homepage: Visit website
screenshot - click to enlarge the File Extensions site!