Standards UIC - International railway union - Page 80

General survey Comparison and analysis of the results of the line tests Conclusions and recommendations

Basic theoretical studies

Effect or reduced acceleration Draft specification

Basic studies

Measurements conducted on existing telephone circuits

Evaluation of the measurements conducted on existing telephone circuits

Description of modems, terminal equip ment, transmission equipment and data transmission systems

Programmes of measurements Descrip tion and scope of the measuring installation

Description of the different parts of the measuring installation and its operation Results of the first measurements

Interference in adjacent audiofrequency and carrierfrequency telephone circuits due to the methods of trans mitting lowfrequency selection pulses and measures to be adopted for reducing them