e following topics: Meaning of unified communications (UC) Components of UC UC today UC is anytime, anyplace, anywhere Mobility provides access anytime Telepresence: the future of presence UC in healthcare The journey ahead During the past few years, Unified Communications (UC) has revolutionized the services available within a company. People started using Plain Old Telephony System (POTS) a few decades back, then they started communicating through email, file transfer (FTP), Bulletin Boards (BBS), World Wide Web (WWW), and SO on. People also started using Instant Messaging (IM) greatly. Then, we have seen the mobile revolution. The web, IM, and smart phone have changed the whole world of communications. Now, we see the evolution of video and social networking. We have SO many ways to communicate and collaborate. This chapter discusses how UC might develop in the coming years based on roadmaps of current products and technologies. Some of the developments seem like part of a science fiction story. A sample day for a business user is provided with that person connecting via new UC technologies such as voice-based communications, push technology, and vir- tual assistants. Some additional, more futurist parts of this example include how a person can interact with others both physically using virtual robots and logically with interac- tions to virtual agents that enable a single person to be in multiple places virtually at the same time. These are all possibilities; however, in this chapter, we cover the current status 298 SIP Trunking of UC, the components of UC, and how UC can connect anyone, anywhere, at any time based on the available resources. This is a very interesting world to live in. It can change the way we work, live, play, and learn. Meaning of UC You need to understand what is meant by UC, which has come into widespread use in the past year or two. In addition to face-to-face communication, three types of communica- tions are used in the real world today: Person-to-person communications: We mean real-t