Private Automatic Branch Exchange (PABX) is a telephone system used by private enterprises and small offices for free internal communication. PABX converged communications platform offers one solution for voice and data which can either be delivered through a fixed or wireless connection for small to medium size enterprises. PABX is an “office in a box” solution data router and switching functions (LAN/WAN). It also supports industry standard voice over internet protocol (VoIP) or session initiation protocol (SIP) as well as wireless communications, voice mail, computer telephone integration (CTI) and much more, all in one platform.