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What is an IP PBX Phone System ?

An IP PBX is a complete telephony system that provides phone calls over IP Data  networks. All conversations are transmitted as Data packets over the network. The expertise includes advanced communication features but also provides for significant worry-free scalability & robustness that all enterprises seek. An enterprise does not need to disrupt its current outside communication infrastructure: An IP PBX can connect to traditional PSTN lines by a VoIP gateway - so an enterprise can keep its regular phone technique.

 
With an IP PBX solution, the business owns & operates the equipment so an upfront capital investment is necessary to buy the equipment & then there's ongoing maintenance costs. This is often better for larger businesses as the call control remains internal to the corporate network & a single wire can be routed to an office to provide both information & voice communications.