Abstract – In this study, it has been planned to communicate directly on mobile without connecting a server in a public or wide area with a radio between two computers and then, some software has been designed. For this, in Visual Studio 2010 C# platform, it has been produced two different software which work simultaneously in transmitter / receiver computers. Text data typed in transmitting computer for communication has been transformed into audio signal via the Ses_Uret software which has been improved for this study, then these data transformed into audio signals have been transferred to another electronic environment through the radio. In this communication period, the loudspeaker and microphone of the transmitting / receiving computers have been used as a detector and convertor. Audio signals which have reached to receiving computer have transformed into the meaningful text via the Ses_Yakala software and mobile communication took place. Bringing this software into use in a fixed or mobile position would be beneficial in some urgent situations when the communication system doesn’t work and the radios work.