Virtual Null Modem 2.5.1 Build 916 Description:

Null-modem cable is basically used for communication of two RS-232 "DTE" devices with each other. To create null-modem connection between the devices you need to use two computers or two serial ports of a single computer connected with null-modem cable.

Virtual Null Modem is a program that has the purpose of emulating one or more RS232 serial ports connected through a virtual null-modem cable.

The both methods described above are expensive and difficult because of many reasons. The most reliable way to create null-modem connection is using of virtual serial ports emulated by virtual serial port driver and null-modem cable.

Why do you need to emulate serial ports and null-modem connection? There are few main reasons to do it. Firstly, you don't need to have two computers connected with real null-modem cable. Secondly, there's no need in a single PC with several free serial ports and additional multi serial port devices which are expensive and bulky.

To emulate null-modem connection Virtual Null Modem can be effectively used. The program emulates one or more couples of RS-232 serial ports connected via virtual null-modem cable. It is possible to create the unlimited couples of virtual serial ports on a single PC and connect them in any sequence using virtual null-modem cable.

Usually you need to use virtual null-modem when you have two applications to be connected via serial ports. In contrast to ordinary connection you do not need any additional hardware (computers, physical serial ports, cables) to perform it. Virtual null-modem allows user emulate virtual null modem connection and run the two applications simultaneously on the same computer.

Moreover, it is possible to emulate real-world situations by adding some errors to the data exchange which may occur during the physical null-modem connection. Owing to its features set Virtual Null Modem can sufficiently ease the work of software developers and testers occupied in the field of industrial automation. Furthermore, the program may also be useful in the reverse engineering as well as in educational needs.

Virtual Null Modem 2.5.1 Build 916 Features:

· No reboot required for virtual serial port. Creating, installing and removing of virtual serial ports occurs at real time;
· No borders. You can create any number of virtual serial port pairs with various shematics (with handshake, without handshake, with parial handshake etc);
· Virtual serial ports is fully independent. Any other hardware or virtual serial ports are not used or occupied. You even can have no serial ports in your system;
· 99.9% emulation. Other applications will never see the difference between real serial port and virtual serial ports, created by Virtual Null Modem software;
· Perfomance. The link between two virtual serial ports is faster then real null-modem cable connection and depends on your computer system speed;
· Hardware reliability. The virtual link is much more reliable than common physical link;
· Software reliability. Our drivers for virtual serial ports had been tested with the verifier under Windows XP SP2 and with Microsoft HCT 12.10;
· Hi-tech. Virtual Null Modem uses kernel driver technology and supports: WDM, WMI, Power Management, PNP, etc.;
· Easy-to-use. Virtual Null Modem software has a simple, menu-driven step by step set-up. Programming is not required to configure the software to configure virtual serial ports and virtual serial ports pairs;
· Additional features. If you are software developer, then you can configure each port to simulate a real-world data exchange with errors in data;
· Scalability and integrability. You can add, remove virtual null modems from your application by using a command line interface;

Virtual Null Modem 2.5.1 Build 916 Limitations:

· 21-day trial
· nag screen
· one virtual null modem device
· 65k traffic limit

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Related searches:

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Virtual Null Modem security information

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