Serial to Ethernet Connector Version History

Serial to Ethernet Connector 7.1.876Released: January 30, 2017

  • Improved: the drivers have passed WHQL certification and are now digitally signed by Microsoft.
  • Fixed: a crash of the service on creating a client Telnet connection on a real COM port.
  • Fixed: when creating a connection, changing the port number did not change the connection name.
  • Fixed: when creating a connection, the “Create as virtual port” option ignored the port type.
  • Fixed: virtual ports might not work after the system was woken up from sleep mode or booted with Fast Startup.
  • Fixed: if the system went to sleep while data transfer was in progress, the communication was not resumed after waking up.
  • Fixed: enabling the “Break connection if no activity for” option could cause an error on the server side.

Serial to Ethernet Connector 7.0.815Released: October 5, 2016

  • Fixed: a crash of the GUI when creating a connection on Windows 10 build 1607.
  • Fixed: a crash of the service when creating identical Telnet connections via mirroring.
  • Fixed: after editing the connection settings, the changes were occasionally not saved.
  • Fixed: for client connections on Windows 10, adding a large number of remote hosts could result in high CPU load.
  • Fixed: a crash of the GUI when rapidly toggling the “Turn On/Off SEC” button.
  • Fixed: when a connection was lost, its status in the connection tree might not be updated.
  • Fixed: reading of the connection list could sometimes fail with an error (OEM version).
  • Fixed: a memory leak in the OEM usage samples.

Serial to Ethernet Connector 7.0.609Released: May 25, 2016

  • Added: a redesigned interface.
  • Added: the ability to export/import the connections configuration (from the GUI as well as the command line).
  • Added: the ability to set the size of the buffer or disable buffering altogether.
  • Improved: performance when creating multiple virtual COM ports at a time.
  • Improved: conditional data sending:
    • you can now specify multiple conditions;
    • the “Send data when received char with code” condition now accepts characters with ASCII codes above 127.
  • Improved: on removing a connection, the virtual COM port is now deleted even when opened.
  • Fixed: an issue where the GUI failed to connect to the service after reopening.
  • Fixed: incorrect behavior of strict baud rate emulation.
  • Fixed: some activation issues.
  • Fixed: a crash of the service on attempt to create a virtual COM port with a long name.
  • Fixed: a condition where a client connection set to communicate with a large number of servers could disappear after a reboot.
  • Fixed: a crash of the GUI on attempt to send a mirror request.
  • Fixed: a condition where a server would sometimes start listening for connections when not supposed to (i.e. when configured to start listening only when the COM port is opened, and the port was closed).
  • Fixed: the service could become unresponsive on startup on some older processors.
  • Fixed: with delayed sending enabled, the data could get split across multiple network packets.
  • Fixed: the “Break connection if no activity” option was not functional.
  • Fixed: a break signal from a device was not transmitted when using the Telnet protocol.
  • Fixed: a few minor bugs related to flow control negotiation.

Serial to Ethernet Connector 6.1.530Released: February 7, 2014

  • Added: Windows 8.1 and Windows Server 2012 R2 support.
  • Improved: data transfer when sharing fax machines.
  • Fixed: incorrect manual reactivation in case there was no Internet connection.
  • Fixed: SEC service failure when trying to successively delete multiple connections.

Serial to Ethernet Connector 6.1.524Released: October 8, 2012


  • Windows 8 and Windows Server 2012 64-bit support;
  • command line options are now available in single and demo builds of SEC (command-line activation is possible as well);
  • connection parameters can be passed to SEC service via command line as an xml structure now.


  • our drivers successfully passed Microsoft Windows Hardware Quality Labs (WHQL) tests and are digitally signed by Microsoft now.


  • activation issue on Windows machine with Thai system locale caused by peculiarities of Thai calendar format;
  • issue when SEC service was not responding while trying to establish telnet connection;
  • SEC GUI and service performance issues caused by handle leak;
  • rare cases of unexpected trial period expiration in SEC demo build after the system reboot;
  • minor compatibility issues with the previous format of service management (for OEM License owners).

Serial to Ethernet Connector 6.0.500Released: April 17, 2012


  • new user interface with connections visualization for even easier connections creation and management;
  • possibility to control serial ports (both on server and client sides) directly from your own application by executing dll functions (for OEM License owners);
  • connections can be created, edited and deleted via command line now (for OEM License owners);
  • possibility to turn off Serial to Ethernet Connector (Administrator rights required). Permits to temporarily disable created connections without deleting them;
  • possibility to specify several remote computers for simultaneous UDP connection;
  • sample client-server pair can be created to see how Serial to Ethernet Connector works;
  • read/write access rights can be now configured basing on the last client’s/server’s activity;
  • connection’s summary and statistics are available upon click on the required connection in the tree;
  • IPv6 support;
  • support for the beta version of Windows 8;
  • Serial to Ethernet Connector can be run and used (including the registration procedure) under user account;
  • automatic check for updates.


  • ring signal transferring mechanism;
  • internal drivers became more stable:
    • data transmission between virtual ports was improved. This makes data transmission lossless and helps avoid application hanging;
    • data transmission on multicore systems was improved. This helps avoid data distortion and transmission hanging;
    • virtual ports creation now consumes less CPU resources, which is useful when multiple connections are created.
  • sending and receiving messages via shared fax machines became more stable.


  • some cases of SEC Service failure when sending data to multiple connections at a time;
  • issue when SEC Service failed to recreate some virtual ports after the system reboot;
  • Telnet initialization issue when data was transferred prior to COM port parameters;
  • multi-client technology issue. Now, even if one of servers does not respond, there is no delay in sending data to the rest of servers.


  • new XML-based mode of communication with SEC Service (for OEM License owners);
  • conditions for packets transmission can be set now for all connection types;
  • statistics on sent/received bytes is now displayed separately for each host of the given connection – for all connection types;
  • setting a period of time after which SEC will try to restore connection is now optional;
  • read/write access rights can be now configured for all connection types;
  • navigation through recently opened SEC tabs is available now;
  • Windows NT4 is not supported anymore.