Since VOIP by its very nature is done with a computer and over the internet, VOIP software is a crucial part of the equation. Of course, if you want to use internet phone, software is an integral component, and you have to make sure that it is going to work with your system.

You can get free VOIP software online at free VOIP software websites. There are some limitations to free VOIP calling software, however, in that you can only use if for computer to computer calling. Free internet phone calling software will not work to call a regular landline, since someone has to pay for the infrastructure to connect the Internet to the telephone system as well as pay for the call time used on the telephone system. Examples of free VOIP software include Skype and Gizmo.

VOIP conference software can be either free or commercial. The free ones do tend to be difficult to setup and use, while the commercial packages are often easy to install and run. However, these also come with setup fees and costs for conference room access. Depending on your needs, you may feel that one option is better than another.

For Linux VOIP software, you want to look at linphone. It is a SIP web phone that works with Gnome desktop under Linux and works as easily as a cell phone. You do require a soundcard, but you can download Linux VOIP software online for free.

VOIP billing software allows VOIP companies to track and charge for the calls that you make. Some companies offer packages that charge by minute of use, and others will offer other options, such as charging by the number of ports. Check with your VOIP Company to find out how you billing is done.

VOIP switchboard software allows you to use a variety of different communication styles. This can be PC-to-PC, PC-to-Phone, Fax-to-Email, and/or Fax-to-Fax calling. Some are done by dialing a phone or fax machine, while others are made dialing and IP address, and still others are electronically transmitted.

No mater what internet phone call software you are looking for, you can often find a VOIP program of some sort on line to download. Just read all of the details about the program carefully so that you know it will work with your system. If all else fails or you need a very specialized system, you can hire a VOIP software developer to come up with a program individually tailored to your specific needs.