3CX Phone System includes a fax server that allows the whole network to send and receive faxes. Faxes are received via email as PDF files, whilst these are sent using the popular Microsoft Windows Fax feature, seamlessly integrated with Office. Time to get rid of that old fax machine!

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| System overview |
| Web-based console | Using VOIP gateways |
| Add a VOIP provider | Manage extensions | Line management |
| Softphone | User portal | Outlook & CRM integration | Unified communications |
| Connect branch offices | Phone provisioning |
| Call conferencing | Enterprise features |