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Posts Tagged ‘null modem’

Network Serial Port Kit updated

Tuesday, December 2nd, 2008

Today we released the new version of Network Serial Port Kit. Now it goes 5.5 Installation issue on Windows Vista has been fixed. The product does not support old license keys, all customers which bought it a year ago and wish to upgrade will be provided with the new license key free of charge.  A few words about the program. (more…)

Virtual Serial Port Kit 5.1 is available!

Monday, December 1st, 2008

Today we released Virtual Serial Port Kit 5.1 which fixes small bug issues. The product does not support old license keys, all customers which bought it a year ago and wish to upgrade will be provided with the new license key free of charge. To make sure everyone knows about the product, here is what you get with Virtual Serial port Kit. (more…)

Virtual Serial Port Kit goes 5.0.8!

Thursday, August 14th, 2008

Our team is ready to inform all customers of the long-awaited Virtual Serial Port Kit update! “Unable to load VSPK API module” error in command line utility is fixed. Thank you for patience and understanding! Enjoy the download! (more…)

Connecting ActiveSync to Pocket PC Emulator Over Virtual Null Modem

Tuesday, May 27th, 2008

Tutorial MovieTo connect ActiveSync to the Pocket PC emulator you have to create virtual serial ports pair by using our Virtual Serial Port Kit product. The null modem scheme should be with full handshaking and DTR to DCD connection. That option is enabled by default. Serial ports COM1 through COM4 are the only usable ports within the emulator.

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Different Null Modems

Tuesday, May 27th, 2008

There are several pinout schemes of virtual null modems. Three lines null modem (without handshaking) is simplest where only the data lines are cross connected in the null modem communication. It’s simplest and can’t be used in all circumstances because there is a problem, if either of the two applications checks the DSR or DCD inputs. These signals normally define the ability of the other side to communicate. As they are not connected, their signal level will never go high. This might cause a problem. As you can imagine, with this simple null modem no hardware flow control can be implemented. The only way to perform flow control is with software flow control using the XOFF and XON characters. Virtual Serial Port Kit doesn’t use simplest null modem. (more…)