Abstract: Disclosed is a process which may be used in a communication arrangement between two stations. In at least one of the stations, an MPU is utilized to control an internal operating system and a baud rate generator. The MPU performs periodic self tests to determine how busy it is, and if it is not too busy with internal tasks it calls a baud rate routine to adjust the rate at which the stations are communicating. This periodic testing allows the baud rate to be adjusted according to current environmental conditions. Further, a timer is provided, internal to the MPU, which is used to prevent the baud rate routine from being executed too frequently.