Black Friday / Cyber Monday Alert: Due to increased traffic demand on mobile communication networks, we are expecting potential congestion for US carrier networks during the Black Friday and Cyber Monday period. Customers may experience intermittent SMS and MMS delivery delays. Please refer to our Black Friday / Cyber Monday FAQ page and our Twilio Status page for more information.

Is T.38 Fax supported?

Twilio supports faxing .PDF documents over the T.30 protocol via the Twilio REST API. For more information, please see our article Getting Started with Twilio Programmable Fax.

At this time, we have no plans to support or migrate to the T.38 fax protocol.

Notice: Twilio Programmable Fax will be disabled for all users on December 17, 2021. New and inactive accounts will lose access as of December 17, 2020. For full details, including migration options, see Fax Support on Twilio.

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