10 REASONS TO SWITCH TO AN IP PBX
The benefits of replacing your old PBX with an IP PBX
What is an IP PBX?
An IP PBX is a complete telephony system that provides telephone calls over IP data networks. All conversations are sent as data packets over the network. The technology includes advanced communication features but also provides a significant dose of worry-free scalability and robustness that all enterprises seek.
Enterprises don’t need to disrupt their current external communication infrastructure: An IP PBX is able to connect to traditional PSTN lines via a VOIP gateway – so an enterprise can keep its regular telephone numbers.
How it works
An IP PBX system consists of one or more SIP phones, an IP PBX server and optionally a VOIP Gateway to connect to existing PSTN lines. The IP PBX server functions in a similar manner to a proxy server: SIP clients, being either soft phones or hardware-based phones, register with the IP PBX server, and when they wish to make a call they ask the IP PBX to establish the connection. The IP PBX has a directory of all phones/users and their corresponding SIP address and thus is able to connect an internal call or route an external call via either a VOIP gateway or a VOIP service provider. More information and commonly asked questioned about IP PBXs can be found on IP PBX, SIP & VOIP FAQ – http://www.3cx.com/PBX/IP-PBX-faq.html
Source and more info: telephonyworld