Serial/IP® COM Port Redirector

On the client computer running Serial/IP:

  • You add virtual COM ports using the Serial/IP Control Panel and configure them to use your serial server.
  • Your application uses Serial/IP virtual COM ports instead of local physical COM ports.
  • Your application opens, reads and writes virtual COM ports using the standard COM port API.
  • The Serial/IP Redirector automatically makes TCP/IP connections to the serial server and relays the virtual COM port data stream and control actions.

At the remote location:

  • The serial server accepts connections from Serial/IP, then converts and relays the data stream and control signals to the server's serial ports.
  • Wireless modems can be used instead of serial servers.
  • The field equipment gets the data stream through serial cables or direct hardware integration.

The Serial/IP Redirector — Version 4.9

Extensive Platform Support


Windows 7/2008/Vista/2003/XP/2000/NT4/9x
Terminal Services, Citrix Metaframe
Native and virtual platforms, including Virtual Server and VMware
32-bit or 64-bit version automatically installs

Scalable, Fast, Flexible


Up to 4,096 virtual COM ports for large applications
Entire data path is at kernel level, including networking and SSL
Low latency, no mode/context switch overhead of a Windows service
Always available, user login not required
Both outbound and inbound connections

Works with your choice of
TCP/IP Serial Servers


Supports COM Port Control Protocol (RFC 2217), Telnet, raw TCP
Uses only widely supported public TCP/IP protocols
Configurable to detect/respond to any server login prompt

Easy to Configure


Verifies access to server and supported TCP/IP protocols
Recommends/sets optimal redirector settings
Can replicate settings across any/all virtual COM ports
Manages IP routing table to maintain server access

Transparent to Applications


Extends server connection for COM port hand-off
Automatically restores interrupted network connections
Synchronizes COM port open with server ready condition
Optionally throttles data rate to COM port settings



Automatically logs in to servers, using multiple credential sources
Supports SSL/TLS connections using OpenSSL (32-bit versions only)
Configurable for proxy servers
Settings and trace logs can be restricted to Administrators



Installs interactively or via command line
Supports unattended command line install with privilege elevation
Uses DNS to resolve hostnames of servers
Configuration snapshot utility helps replicate settings during install
User-defined presets allow quick/controlled reconfiguration
ActiveX interface supports run-time reconfiguration