The evolutions of UMTS toward the future wireless all-IP network mainly by the introduction of the IP Multimedia Subsystem (IMS) at the service level enable the realization of one of the foremost requisites in the Next Generation Networks (NGN): the Service Convergence. Furthermore the Service Capability based architecture of IMS characterises this subsystem as a mean for enabling the NGN services. Alongside with these remarkable gains attained by IMS, this overlay network goes through strict inadequacies in the management of the service interactions. In this paper we present insights into the so far research works in the service interaction management domain and we propose a framework for dealing with this problem in IMS. The particularity of our proposition consists of including both the traditional telephony services and the 3GPP (3rd Generation Partnership Project) standardized services. Moreover our proposition enables a dynamic and online service interaction management mechanism and eliminates the undesired consequences of service interactions. Key Words: Service Capability and Feature Interaction Management, SIP, IMS.