![]() A null-modem connection is not standardized, so there are several possible wiring layouts. In the null-modem connection, the transmission and reception lines are connected crosswise. Therefore, RS-232 connection is asymmetric: it requires the modem on one side and the data source/consumer on the other side. By means of modems, teletypes communicated with each other. Initially, the RS-232 standard was intended for connecting a teletype with a telephone modem. ![]() Virtual RS232 null modem cable is not limited by the distance and allows transferring data significantly faster.Ī null-modem connection is a connection created via RS232 protocol between two computers without a modem. Unfortunately, the solution cannot guarantee the high speed of data transfer, but don’t worry: with a dedicated software, Null Modem Emulator, you’ll be able to create a virtual null modem connection. This universal cable supports both the 9- and 25-pin connectors and allows establishing communication between two computers via their COM ports. Is there a solution? Yes, a standard null modem cable will help you easily achieve it. Or, maybe, you need to transfer several large files from one PC to another. Let’s imagine you have one modem and two computers at home and want to be able to access the Internet from both of them.
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