�1���� Introduction
�2����
Circuit-switched services
������� 2.1���� pre-selection delay (overlap sending)
������� 2.2���� post-selection delay
������� 2.3���� answer signal delay
������� 2.4���� call release delay
������� 2.5���� probability of end-to-end blocking
�3����
Target values for GOS parameters
�4����
Recommendation history