rk Control and Management Plane using proprietary signaling to set up the network as required for that particular video channel. Steps 12-14: Upon successful network setup, the Network Service will send a SIP OK message back along the same route with the video information (copied from the Indirection Service's INVITE message), based on which the requester can start streaming video. Step 15: The Composite Service at the AS sends a SIP OK message containing VideoServer2 IP address to the IMS Core (to be routed to the TV (video client)). Step 16: The IMS Core sends the SIP OK message (with VideoServer2 IP address) to the TV (video client) which will then connect to the IPTV Channel 1 (located in VideoServer2) via the Managed Optical Network. Service Delivery Platforms 9.4 Integrated Telecom and IT Service Delivery Platform After talking about the IMS-based platform, we discuss the possibility of integrat- ing IMS with Web Service (WS). IMS and WS are SOA architectures proposed and promoted separately by the telecommunications industry and IT industry, respec- tively. As a result, some overlap exists between the two technologies and respective modules. We propose a Service Delivery Platform (SDP) that can inter-work between IMS and WS. The proposed SDP can leverage and blend telecom and IT services to reach a larger user base and provide more interesting/complex services. Despite frequent signs that the telecom industry is on a collision course with the IT industry, the potential for cooperation between them will benefit both segments of the market. Conventionally, IT vendors are strong in WS while telecom vendors are strong in IMS. Generally, they target different user groups by satisfying dissimilar requirements. Therefore, integrating IMS and WS will provide new opportunities for them to reach an even larger user base and create synergies, in terms of new and exciting service offerings. For example, by combining an IMS-enabled "push-to- talk" service with WS-based map service, a restaurant can make use of this "bl