re support for open architecture-server based platform; support for open OS like Linux, inter-operability with legacy and multi vendors over open standards; VoIP support (H323, SIP) and integration of converged applications like UMS.” (Gold book: Technology options, 2003, para.2).
Coming to its disadvantages, it is slow and is uneconomical and could be difficult to use in regions where barriers are present. The use of EPABX could be severally compromised when noise and lack of clarity could result in it becoming a non entity and over long distance telephony which is as expensive as unfriendly.
Before taking up the aspect of upgrading conventional telephone systems, it is necessary to define and understand what a unified communication system really means. It is the integration of real-time communication services like instant messages (chat), presenting information, IP Telephony, video conferencing, speech recognition and dealing with unified systems like voicemail, e-mail, SMS, facsimile machines. Rather than being seen as a single product, unified communication system refers to a group of products and services which is aimed at achieving consistency in unifying and also in the improved user interfacing. A unified communication system can be gainfully employed in the business process integration.
Thus, the main aspects of UC would be to dispense with laborious and time consuming PBX models and have an integrated, electronic state-of-the-art computer based telephony system that could address modern aspects of speed, efficiency and real time use of modern Electronic Communication Systems.
What UCS seeks to achieve is in terms of dramatic cost savings, reduction in time and labor and quick and speedy telecommunication systems, not only within the enterprise but outside it. Under such systems, it is possible to communicate effortlessly and speedily with employees and vendors, situated in far off contract work sites or in distant places in different parts of the