Enticement to use web surveys is becoming more common, since this mode is less expensive than the alternative modes. On the other hand, no-one trusts in web as the only mode, since non-response is expected to be too high. Hence, a mixed mode strategy is proposed. There are different approach-es to mixed mode design. We test such an approach that the data collection will start via web and after a certain short period, CATI will complete data. Finally, we compare the successfulness of this mixed mode strategy against pure CATI. The reason is that this survey has been compiled using CATI but if a new mixed mode strategy is good, this will be used in future. So, we have to compare the successfulness of both approaches in a good way. This also requires to design a sample well. So, our target population is the same as used in the regular survey that does not cover the full population but the people with telephone access only. The paper presents our sampling design and gives the basic results from the test.