Sending Faxes via T.38 and 3CX (2024)

I'm looking for a way to send faxes via our 3CX phone system. I really don't understand how 3CX handles this. Can we send a fax via the 3CX system and it would then send it via our SIP trunk, no additional hardware required? How would we initiate/transmit the fax to the 3cx phone system?

We've been using GFI faxmaker for years on a physical box, but would love to ditch the box and send faxes via our 3CX Virtual Machine. Thanks!

3CX is unable to send faxes, it can only receive them,

If you want to send faxes, you need a fax machine and a ata convertor box.

Use google, plenty of web based fax systems.

3CX Supports both T.38 FAX and G711 pass-through. But be careful if you want to use an ATA or gateway with a hosted 3CX system as this will not work with T.38 and be un-supported (unless using a VPN connection).

Here is the list of supported Gateways for the system: https://www.3cx.com/voip-gateways/

Must better to opt for an online service however unless it is crucial for the business in question.

@advlaser

3CX has no native send fax capability so every answer is just going to be something interfacing with the PBX where 3CX is effectively providing dial tone access to your fax device/software. So this could be an ATA or a software modem in GFI that speaks SIP to 3CX.

We do all of my fax sending outside of 3CX. We use HTTP fax adapters where actual fax machines are still needed and web/email to fax via our UCaaS platform for everything else. G.711 faxing works well in perfect network conditions but any little hiccups and your have problems. T.38 fixes the problem of network quality as far as faxing goes but then you have whole other issue of T.38 fax compatibility since everyone has their own 'interpretation' of the standard.