Secure Faxing

Reliably transmit documents with Fax over Private IP

Modern cloud control and API efficiency without sacrificing the security or reliability of traditional fax. Questions on setup? Talk to our experts
Build on a fax-friendly platform with unmatched support
  • Leverage our Programmable Fax API
    Send and manage fax programmatically via API with just a few lines of code.
  • Secure your communications
    Improve fax security and quality wherever you are on our private IP network.
  • Eliminate errors
    Use automatic error correction to guarantee delivery success.

Get total control with Fax

Easy as API

Leverage our Programmable Fax API to send and manage faxes programmatically.

Enhanced Security

Safeguard your data with encryption over private connections.

Private Network

Strengthen and simplify your communications with a purpose-built, private IP network.

24/7 Support

Our team of in-house fax experts is available around the clock.

Quality Routing

Access premium outbound routing with direct connections to Tier-1 partners.

Protocol Support

Deliver faxes via T.38 (with control over re-INVITE initiator) or G.711 pass-through.

Number Search

Search for numbers by prefix or rate center location.


Enjoy 99.999% uptime with our resilient multi-cloud network architecture.

Real-time Faxing that's HIPAA-Compliance Ready

  • Fax Quality Guarantee
    Our purpose-built global IP network means greater reliability and security with lower latency.
  • Granular Control
    Configure and customize your fax settings in real-time using our Mission Control Portal.
  • Unparalleled 24/7 Support
    Our team of in-house fax experts is available around the clock.
  • Fair and Transparent Pricing
    We offer pay-as-you-go pricing with automatic volume and commitment discounts.

Frequently Asked Questions

Can you send fax over a SIP trunk?
Yes - you can send, receive and manage faxes over your SIP trunks with Telnyx. This allows you to reliably send, receive and manage secure documents without the need for an antiquated fax machine. What’s more - our Programmable Fax API allows you to send and manage faxes programmatically.

What is fax over IP?
Fax over IP (FoIP) is a term used to describe sending faxes using a voice-over IP (VoIP) network. FoIP uses a protocol like T.38 or G.711 to encode the file into a format suitable for sending over SIP trunks.

Why is fax still used?
Fax is still a popular choice in applications where there are legal and regulatory considerations, such as transferring documents that require hard-copy signatures, and protected health information (PHI). It’s also popular as a backup communications method in case of internet connectivity issues.

How can I send fax via API?
You can send and manage fax programmatically in just a few lines of code using the Telnyx Programmable Fax API. Learn how to get started by checking our developer docs.

Ready to get started?

Try it Free

Questions on setup? Talk to our experts

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