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How to Convert PBX to VoIP

Updated on September 30, 2010


So you've done your research and are convinced that VoIP is the way to go. But now you're wary and don't know what exactly your setup will look like. In this article, we take a look at three different ways in which your VoIP PBX system can replace your old PSTN system.

There are many technological solutions that can be implemented to convert your systems to VoIP, but there are three main ways.

In House VoIP PBX

The most direct way to bring VoIP to your organization is to arrange it all yourself. You need to not only purchase the equipment such as VoIP phones or ATA adapters, but  also need to buy the server hardware, that routes and manages your VoIP calls and then passes it along something like an SIP trunk which connects with an ISTP or gateway cards so that you can make calls to those using PSTN phone lines.

Though this technique gives you complete customization capabilities, there are many disadvantages such as large initial capital outlays as well as the need to maintain your own in house staff. Combine this with the necessity of upgrading and maintaining your hardware, and you have a situation where the only entities for whom this approach makes sense are large corporations with specialized needs and resources.

Convert PBX to VoIP
Convert PBX to VoIP

Managed VoIP PBX

The second option is to buy all the VoIP equipment yourself and have a third party manage it. This takes out some of the headache of hiring your own personnel which can be expensive and time consuming. It also allows you retain complete ownership of the VoIP process and there's no limit to the customization you can have. The disadvantage of course is that you still need to buy expensive hardware, set aside room in your premises for it and pay for its maintenance.

Hosted PBX VoIP systems

This is the ultimate in convenience. A third party hosts the equipment, takes care of every single need of yours and you just pay the monthly fee for maintenance and administration. This model is becoming very popular especially with small business PBX systems. The ease of setup and the abstraction of technicalities is just what is needed in a specialized world.

Depending on your needs, you will have to choose on of these three set ups. All three will of course require you to either modify your existing phones with ATA adapters or purchase new ones. There are many sites which have a good review of VoIP phones and you must choose one that suites your business requirements.


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    • DonnaACN profile image

      DonnaACN 7 years ago from Shreveport, Louisiana

      Never heard of a PBX but thanks for the information. I guess you learn something new everyday.