IP PBX, also known as unified communications or business telephone system, a telephone call center internal switching system. PBX systems can handle the communication between sites, and effective management. PBX is called the Private Branch eXchange (private branch exchange), which is a more old-fashioned terms, the fact that the system in the last century has been remarkable development. The traditional PBX system is composed of two key factors: the routes and stops. Line, also known as a relay, is connected by the telephone company to the public switched telephone network (PSTN) hub. Constitute only a phone or similar fax machines, modems, and credit card terminals and other equipment site.
PBX initial mission is to share limited resources. It is different from single singlet, a business can enjoy all site resources within the LAN. Automatically connect incoming calls by the processor, and then automatically transfer the appropriate person or department. When internal staff need to make a call, the processor will select an available line to connect. These early systems are often referred to simply as “telephone exchange.”
Over time, the management processor line gradually being replaced by electromechanical and electronic systems after. The original system add additional functionality to optimize the inbound route, so the call can be transmitted efficiently between sites, and also in accordance with the provisions of the access or reject the call. Some systems also increased, such as voice mail, call queuing and other value-added services.
Today, the company’s phone system is no longer just a simple converter. Such as auto-attendant, voice messaging, call waiting and conferencing and other assistive technology has become the standard configuration. Basic analog and proprietary digital phones have been replaced by standard IP phones. Now, customers can communicate via SIP trunk or other forms of VoIP services on the Internet with the outside.
At the beginning of the development of PBX systems, electronic communication is available only on a wired telephone. Today, the field of communications has expanded to include e-mail, instant messaging, video conferencing, desktop sharing, text messaging and mobile phones. Unified Communications is a catch-all term, it represents the integration of all these technologies and business process integration process. UC purpose is to improve efficiency, while simplifying management.