
Unified communications (UC) refers to the integration of real-time communication with non-real-time communication such as messaging, voice mail, fax and others. The real-time communication in the UC includes instant messaging, video conferencing, data sharing, internet protocol (IP) telephony, desktop sharing and others. It can also be used for other forms of communications which include digital signage, internet protocol television (IPTV) and others. Unified communications is a business term used to illustrate all types of call and multimedia message handling functions managed by an individual user for business processes. Unified communication is a useful tool to enhance the business processes as it provides seamless communication. Moreover, unified communication saves time and helps increasing productivity of the employees in an organization as it provides easy and convenient mode of communication. Unified communication is also useful for communication between two different networks. For instance, it allows a person to send a message from one particular network/medium and receive for the same communication via another medium.