As defined in [ITU-T H.626]@ the visual surveillance service is a telecommunication service focusing on video (but also including audio) application technology@ which is used to remotely capture multimedia (such as audio@ video@ image and alarm signals) and present them to the end user in a user-friendly manner@ based on a managed broadband network with ensured quality@ security and reliability. The objective of this document is to describe the detailed specifications of reference points@ signalling and control methods@ and overall protocols of a visual surveillance system based on the functional architecture defined in [ITU-T H.626].