A Fax ATA (Analog Telephone Adapter) is a device that allows traditional analog fax machines to connect to digital networks, such as VoIP (Voice over Internet Protocol) or cloud fax services. It bridges the gap between older fax technology and modern communication infrastructures.
How Does a Fax ATA Work?
A Fax ATA connects to:
A traditional fax machine via its standard telephone (RJ11) port.
A VoIP network or internet service through an Ethernet (RJ45) connection.
Some ATAs also support T.38 Fax over IP, which is a protocol designed for reliable fax transmission over digital networks.
Why Use a Fax ATA?
Preserve Legacy Equipment – Businesses that still rely on physical fax machines can continue using them without needing a traditional phone line.
Cost Savings – Eliminates the need for expensive landline connections by using VoIP services.
Flexible Connectivity – Integrates fax machines into cloud based fax services or modern IP-based networks.
Enhanced Security – Some ATAs offer encryption and secure fax transmission for sensitive data.
Limitations of a Fax ATA
Not all VoIP services are compatible with fax. If the ATA does not support T.38, fax transmissions may fail or experience reliability issues.
A dedicated internet connection or quality-of-service (QoS) settings may be needed to ensure smooth faxing.
Enterprise Fax Gateway
Access our comprehensive REST API documentation and scale your messaging, fast!
Explore API Documentation Fax From Email
Create a new email, attach your fax document and enter the recipient’s fax number.
Explore Email To Fax 
