T38Fax was founded in 2002 by people who had been working with fax technology since the early days of the internet — back when fax-over-IP was an experimental concept and the idea of sending a facsimile over a packet-switched network seemed genuinely exotic.
As the telecommunications industry shifted from traditional circuit-switched (TDM) phone lines toward SIP and VoIP, we watched what happened to fax. Carrier after carrier — large and small — built next-generation networks that treated fax as a footnote. The T.38 standard existed. The protocol was well-defined. But actually implementing it correctly — with ECM error correction always on, with infrastructure engineered specifically for fax traffic rather than voice — requires a depth of fax expertise that most VoIP providers simply do not have. They’re voice people.
By 2013, we had come to a conclusion that was equal parts frustrating and clarifying: we could not put our hand on our heart and recommend a single SIP trunk provider with a truly credible T.38 fax implementation at the core of their network. So we decided to build one ourselves. The result is Power-T.38 — a fax-native SIP trunking service with an in-house T.38 stack, ECM on every call, and gateways placed inside carrier networks. See why it’s built differently.