Having added a whole new host of VoIP providers with the Release Candidate for 3CX Phone System 12.5, we are pleased to welcome even more with the final launch of version 12.5. With over 20 new VoIP providers certified, you can offer your customers even more choice!
To view the full list of supported VoIP Providers please click here. If you are a 3rd party VoIP Provider and wish to be added on our 3CX Supported VoIP Providers list and on the 3CX Phone System Setup, you can fill in the VoIP Provider Interoperability Application. The interop test ensures that all features work properly with 3CX Phone System and is done by both the VoIP Provider and the 3CX Testing Department.