Communications in today's business environment have gone beyond the basic Intercom calls, made possible using the legacy and usually, to a large extent, proprietary Private Automatic Private Exchange (PABX) systems; with documents transmitted via fax machines and "leave me a message" solution provided by a largely disjointed Voice-Mail system.
The next generation network communication system in todayâ€™s enterprise environment consists of the Unified Communication System, with the IP-PBX being its base component. The unified communication system is able to bring to the business environment, a voice, video and presence (like Instant Messenger) on the same platform.