The use of radio telephony procedures and phraseology will be the primary method of communication between Air traffic controllers and aircraft, surface vehicles and rescue and fire fighting vehicles operating the manoeuvring area.
It is important that radio telephony (RTF) communications be conducted in the standard manner with regard to phraseology procedures and language.
At busy aerodromes the work load on the controller can be extremly high and procedures should be designed with a view to minimizing the need of RTF communication.
In the IVAO network, Radio telephony communication uses voice servers to simulate real radio communication between air traffic controllers and pilots. In IVAO, communication between air traffic controllers and pilots should use text communication by using the IVAO pilot client when the voice communication by using a voice server is not possible.