28 Jan

What is a PBX Phone System?

PBX means Private Branch Exchange that is a private phone network utilized within an organization or a firm. Users of the PBX telephone system share multiple outside lines for making outgoing phone calls.

pbx phone system

A PBX Telephone System connects the internal phones within an organization and also links them to the PSTN (public switched telephone network), SIP Trunks and VoIP Providers.

One of the most recent tendencies in the development of PBX telephone system is the IP PBX, also called VoIP PBX, which utilizes the Internet Protocol to transmit calls.

Nowadays, four types of different PBX phone system options are available:


  • PBX
  • Virtual/Hosted PBX
  • VoIP PBX
  • Virtual/Hosted VoIP PBX



IP PBX (VoIP Private Branch Exchange) is a software-based PBX telephone system which helps achieve certain tasks and provides services that can be costly and difficult to implement when utilizing a traditional PBX.


One of the expertise of Shard Global Ltd is providing the telephone systems including the internal phones and public switched phone networks for small and medium as well as large sized organisations.

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