DialogUnion. Dialogue marketing is our passion. Telephone acquisition is our core service. But we have more to offer you. With our many years of experience, we are your competent partner for dialogue marketing. Regardless of whether this involves appointment acquisition, leads, mailings, address comparisons or other sales-supporting activities. Each of our contacts has years of experience in B2B telemarketing, especially in the appointment of new customers. Our mission is excellent telephone acquisition by professionals for professionals.