T.38 Fax Over IP Solutions
T38Fax delivers reliable T.38 SIP trunks for enterprise fax servers, voice service providers, and business fax deployments. Built by fax people, for fax people.
T38Fax is a dedicated T.38 fax over IP carrier — not a voice provider with fax bolted on. Our network was built from the ground up for one purpose: reliable fax transmission at scale. Every technical decision, from our in-house T.38 stack to ECM being mandatory on every call, was made with fax reliability in mind.
Power-T.38, our flagship SIP trunking service, serves three distinct audiences. The product is the same — one T.38 stack, one network, one set of engineering decisions — but the reasons to use it vary depending on how your organization sends and receives fax.
Enterprise Fax Servers — Running RightFax, HylaFAX Enterprise, GFI FaxMaker, or XMedius? Power-T.38 was engineered around the Dialogic SR140, the same T.38 engine family your fax server uses. Deep interoperability, not coincidental compatibility.
Voice Service Providers — ITSPs and UCaaS platforms use T38Fax to offload fax traffic with a simple SIP interconnect. You claim T.38 support; we handle the T.38. Wholesale pricing available for volume commitments.
Business Fax Connectivity — IP-PBX, ATA, MFP, or a mix of all three — Power-T.38 connects to virtually any T.38-capable device. If your VoIP migration broke fax, this is the fix.
Not sure which fits your situation? Contact our team — we’ll point you in the right direction.
Stop Wincing When Customers Ask About Fax
Offload fax from your network with Service Provider T.38 from T38Fax. Wholesale pricing, certified softswitch integrations, and support that actually escalates.
The SIP Trunk Your Fax Server Was Waiting For
Power-T.38 was engineered from day one for RightFax, HylaFAX Enterprise, GFI FaxMaker, and most other Dialogic SR140 or XCAPI-based enterprise fax servers. Finally, a carrier that understands modern enterprise fax.
Your VoIP Migration Doesn't Have to Kill Your Fax
Power-T.38 delivers reliable T.38 Fax Over IP for businesses running ATAs, IP-PBXs, MFPs, and analog fax machines. One fax-optimized SIP trunk. Countless ways to connect.