What is FoIP – Fax over IP?


FoIP stands for Fax over IP and refers to the process of sending and receiving faxes via a VoIP network.

Fax over IP works via T38 and requires a T38 capable VoIP Gateway as well as a T38 capable fax machine, fax card or fax software. Fax Server software that can talk ‘T38’ allows the great Unified Communications feature, Fax to Email, which sends faxes directly via a VoIP gateway and converts the fax message into an email. The plus side is that no additional fax hardware is needed for the Fax to Email feature to work seamlessly!

3CX includes a full featured T38 fax server that allows faxes to be received from anywhere in the network. Faxes can be received as PDF and forwarded via email. Other fax servers currently in the market require the use of separately licensed and expensive Dialogic SoftIP drivers.

Further Reading

What is T38?
How does Fax work in VoIP environments?