online Central Hotel Chain reservation system

In this project we have to gather group of hotels with different property management systems. we need to fine the best solution for this web application. the number of rooms in some hotels is 200. we need all the hotels to be 2-way interfaced with some GDS and IDS systems. also customers can: - book online from the central reservation system (CRS) - managing rates and promotions - Add travel agencies - Credit card acceptance - Direct online payments - Reports Please people with experience in this field only are required.