Every company in the world needs telecommunication system to support their work because in business is how to make every process simple, quick, and efficient. The most popular one is phone line for voice communication among employees, business clients, and customers. While for data almost every company has facsimiles for sending any document or file. To make low cost communication, companies also have Private Automatic Branch Exchange to handle internal communication (in one building or area only).
But during global recession and climate change issue, this communication system is realized still need more changes for efficiency, until issued a communication solution via internet protocol. The main idea that all types of data including voice, text, or multimedia are sent over internet connection so that people can reduce much cost such as any international or long distance voice call (renown as VoIP), furthermore a traditional PABX also replaced by Virtual one (Virtual Phone System).
In data or text transfer, people now can use internet fax system to send and receive fax email efficiently. Besides that, this system brings so significant reduction in cost where people mainly just charged for the internet connection. It also no need any use of paper, it means we help ourselves to stop global warming issue by using this environmentally friendly technology.