This document describes a test plan based on the ATIS IIF IPTV Functional Architecture interfaces in order to demonstrate multi-vendor interoperability with specific scenarios defined within ATIS- 0800047@ Scenarios for ATIS IIF IPTV Interoperability Testing [1]. This document covers the Scenario 3 test cases as shown below: Scenario 3: Content on Demand Service Attachment and Service Use Scenario 3a: Content Acquisition@ Preparation@ and Distribution. Scenario 3b: Content Discovery and Selection. Scenario 3c: Session Management.