3CX recommends using a supported VoIP provider and has a successful partnership with the companies listed below. All of these preferred VoIP providers have been tested for interoperability with 3CX Phone System, are re-tested with each new build, and their configuration templates are included with 3CX’s software:
|United States of America|
Other 3rd party VoIP providers In addition to the above preferred VoIP providers, 3CX is compatible with a great many other VoIP providers. These have been tested by the community and found to be working at time of testing. These VoIP providers are listed on the 3CX Wiki. Click here for the complete list. For a list of 3CX’s VoIP hardware partners click here.