New Product Launch: Programmable Fax API

Programmable Fax API

Choosing Telnyx for secure faxing means you can rely on our purpose-built, private IP network to keep your communications secure, and leverage our unmatched support for T.38 and G.711 pass-through protocols. Today, we’re excited to build on our fax offering with our brand new Programmable Fax API.

The Fax API allows you to programmatically send and manage faxes over the Telnyx network, meaning it’s now easier than ever to leverage our fax-friendly platform to meet your secure communications needs.

Customers don’t just choose Telnyx for fax because of our best-in-class telephony services and world-beating network – here are just a few features of our fax-friendly platform:

• Support for T.38 Fax over IP (FoIP) protocol, with control over T.38 re-INVITE initiator.
• Support for G.711 pass-through protocol.
• Best-in-class support for automatic error correction, including Error Correction Mode (ECM), redundant frames, and Forward Error Correction (FEC).

A 2017 IDC report showed that fax usage is growing in industries such as healthcare and education, thanks largely to support from cloud fax solutions. Today, Telnyx is proud to join the community of Programmable Fax API providers with a fast, reliable, and cost-effective API solution.

You can learn how to start sending and managing faxes with our Programmable Fax API by checking out the full release notes, or heading straight to the developer docs.

Curious about our fax offering? Talk to a fax expert today.

FAQ

Can Iterable send SMS? Yes, Iterable can send SMS and handle link tracking for campaigns using its built-in shortener. You will still need registered senders and compliant opt-in flows to meet carrier and legal requirements.

Is SMS marketing legal in the USA? It is legal when you obtain explicit consent, disclose message frequency and data rates, and provide clear STOP and HELP commands per TCPA and CTIA guidelines. Keep timestamped consent records and honor opt-outs immediately.

What is replacing SMS for business messaging? RCS and OTT apps offer richer features, yet SMS continues to deliver unmatched reach across devices and carriers. Most brands use SMS for time-sensitive alerts and layer richer channels for multimedia engagement.

Can Iterable send MMS, and what are best practices? Iterable can send MMS where supported, and you should optimize media size, captions, and fallbacks; a quick refresher on what MMS messaging is helps you pick the right creative. Always test rendering on iOS and Android and confirm carrier file limits before launch.

Should I use SMS or MMS for my campaign in Iterable? Use SMS for brief alerts, codes, and reminders, and choose MMS when images or longer copy will lift clarity and conversion; the key differences in SMS vs. MMS explain when each channel excels. Consider cost, file size, and brand impact before you commit.

Is there any free SMS service suitable for marketing campaigns? Consumer-grade free texting apps exist, but they lack the deliverability controls, compliance safeguards, and SLAs required for commercial outreach. For regulated campaigns, plan for verified senders, opt-in capture, quiet hours, and reporting.

What is the difference between MMS group and broadcast messaging? Group MMS puts recipients in a shared thread where everyone sees replies, while broadcast MMS sends one-to-many without exposing participant numbers, as outlined in MMS group or broadcast messaging. Use broadcast for marketing and announcements, and reserve group threads for small collaborative audiences.