CONTENTS

�1���� General����
������� 1.1���� Scope���
������� 1.2���� References
�2���� The E-model, a computational model for use in transmission planning
������� 2.1���� Introduction�������
������� 2.2���� Source code�������
�3���� The structure and basic algorithms of the E-model�����
������� 3.1���� Calculation of the transmission rating factor, R��
������� 3.2���� Basic signal-to-noise ratio, Ro����
������� 3.3���� Simultaneous impairment factor, Is�������
������� 3.4���� Delay impairment factor, Id������
������� 3.5���� Equipment impairment factor, Ie
������� 3.6���� Advantage factor, A�������
������� 3.7���� Default values����
Annex A � Conditions of using the E-model����
������� A.1���� Examples of conditions where caution must be exercised when using the E‑model�����
������� A.2���� Conditions for which the performance of the E-model has been improved by updating from the earlier version����
Annex B � Quality measures derived from the transmission rating factor R����
Annex C � Source code for G.107_4 in BASIC����
Appendix I � Calculation of R from MOSCQE Values����