To provide the cost savings of IP-based phone calls for small companies, a couple of VoIP lines with a business plan from a low-cost provider such as Vonage or Lingo will suffice. But as the organization grows, users will want to look at more sophisticated options, the same as if using a public switched telephone network (PSTN).
IP-PBX opens up possibilities, allowing for almost unlimited growth in terms of extensions and trunks, and introducing more complex functions that are more costly and difficult to implement with a traditional PBX, such as:
- Ring Groups
- Digital Receptionists