Although less known outside strictly specialized environments, Business Support Systems (BSS) are highly complex and the subject of their installation in cloud implementations is less addressed. This paper presents a short history of evolution, starting from basic voice and messaging services and ending up to 4G and services, presenting new features and their new challenges. Moreover, they present, as a baseline for future developments, a study based on direct interviews with representatives of telecom operators about their vision of possible future BSS solutions depending on the services they will provide.