Abstract Based on an analysis of the present French domestic telephone habits, this paper puts forward an original approach for the evaluation of telephone and mobility interactions. A survey carried out on a sample of 663 French people, which recorded the characteristics of 7252 domestic telephone calls, has enabled us to identify, evaluate and characterize these impacts by distinguishing 4 types of telephone traffic: specific traffic, management traffic, substitution traffic and induction traffic. The main finding is that nearly two thirds of domestic telephone activity is linked to daily mobility, whether it replaces, generates or manages trips or activities.