Influencing the efficiency rate of the international network by different modes of handling ineffective call attempts

Describes the procedure of establishing international subscriber-dialled connections considering repeats when call attempts have not succeeded. The objective of the investigation is to find out the impact of subscriber behaviour when facing call failure, and of some modified procedures such as call offer, automatic answering and automatic repeating devices. A simulation model offers the possibility of deciding which parameters of subscriber behaviour have the main influence to the traffic and which simplifications can be made. First results are presented.