The wide acceptance of Internet technologies and their applications such as voice over IP (VoIP), and video-conferencing leads to the apparition of multitude of standards. Session Initiation Protocol (SIP) and Web services technologies are both emergent and well adopted standards. SIP supports several services such as voice, multi-party multimedia conferencing, presence, location-based services, and instant messaging, and therefore, it consists of a common framework for future communication services. However, the lack of an integrating framework for unifying SIP services under common service oriented architecture (SOA) represents an obstacle to their deployment, exploitation, and management. In this paper, we propose a new framework to integrate SIP features within the Service Oriented Architecture. The proposed SIP/Web services integrated framework is of paramount importance for the successful exploitation of SIP services. This will enable both SIP services providers and requestors to gain from the flexibility of exploiting and managing SIP services they are providing and/or consuming. The integration procedures are offered to providers and clients of SIP services and are designed to fit into a highly dynamic and distributed environment of Web services. We have also proposed the composition of some SIP Web services to provide wide range of functionalities to SIP client. Some components of the architecture are implemented.