What are some of the advantages of an IP-PBX?
In general, An IP-PBX provides more efficient switching and an advance set of business-class features. For example, it allows phone calls to be forwarded within the company, and for internal voice-mail and conferencing capabilities that might otherwise have to be outsourced. An IP-PBX is also much more flexible than a PSTN PBX, allowing an essentially infinite number of extensions and voice-mail boxes, plus desktop management rather than at a set of PSTN switches.
