T38Fax Blog

Podcast: CHANNEL PARTNERS – SPECIAL FEATURE – Finally, Fax technology that WORKS ALL THE TIME for Business, Fax Servers and Service Providers.

- Posted on Telecom Reseller on April 10, 2019

It is long overdue.  Sending faxes over the internet has been a problem since they first started sending them.  It is still an essential part of businesses but always the after-thought when migrating to the cloud. Faxes are not an after-thought any longer. Darren Nickerson, Founder and President of T38FAX, has been involved with faxes and the internet for decades. He explains to Don Witt of The Channel Daily News, a TR publication how he does it. It is a very interesting explanation of how he identified the actual internet-fax problem and how T38FAX fixed it.

Is T.38 Fax Over IP (FoIP) causing you headaches? Are you experiencing surprisingly poor fax performance after converting/upgrading to SIP phone service? Can't find the source of your troubles? We feel your pain, we really really do. The good news is that FoIP doesn’t have to be a nightmare and in fact, when done correctly it can be just as reliable as faxing over traditional phone lines.

As you may already know all too well, there are many places a T.38 implementation can go wrong. It could be an issue with the underlying carrier, the equipment, a firewall, the fax software itself, or even the settings used during configuration. With so many moving parts the failures you're experiencing can seem unpredictable, .... random even. That’s where T38Fax’s experienced support engineers can help. Our motto is science, not superstition, and we're in the myth busting business.

We are pleased to announce that we have successfully completed interoperability testing with FreeSWITCH, a powerful open source telephony platform capable of routing and connecting various communication protocols such as audio, video or text. FreeSWITCH was designed by several former developers of the popular Asterisk open source PBX and was created to address the drawbacks of proprietary solutions with a focus on key design goals such as stability and scalability.

Today, FreeSWITCH is used by thousands of businesses from all corners of the globe in a range of industries, including carriers, communication startups and enterprise businesses. At its core, 

We’re excited to announce that we've successfully completed interoperability testing with FusionPBX, a popular web front-end to FreeSWITCH, the legendary cross-platform scalable (and free) multi-protocol softswitch. 

In simple terms, FusionPBX is to FreeSwitch as FreePBX is to Asterisk - in other words it’s FreeSWITCH for mere mortals. FreeSWITCH is a powerful and scalable voice switch used by many of the world’s leading telecommunications service providers and a large percentage of businesses worldwide, but it has a pretty steep learning curve and can take weeks, if not months to master. 

FusionPBX adds extra functionality to the FreeSwitch platform while making it easy to administer via an attractive

T38Fax knows that providing and supporting reliable Fax over IP (FoIP) can be a key differentiator for VoIP service providers. VoIP networks are optimized for voice services, not fax, making it challenging for these service providers to support FoIP. That’s why we partnered with Telinta, a global leader in cloud-based white label switching and billing solutions for VoIP service providers and their resellers. Their portfolio includes business and residential VoIP, hosted PBX, audio-conferencing, calling card, pinless, mobile, callback and wholesale VoIP. By working together, we can deliver reliable fax solutions to VoIP service providers.

Do you manufacture or represent a product such as a VoIP gateway, ATA, fax server or other such device that supports T.38 Fax Over IP (FoIP)? Do you frequently hear from customers having trouble getting T.38 to work reliably in their environment? If so, do you wish you could recommend a SIP trunk provider who specializes in T.38 and offers carrier-grade T.38 termination and origination to pair with your equipment? Well I have great news for you, ... we do that.

Believe it or not, we sell SIP trunks whose only purpose in life is to offer reliable fax transmission! We use our own T.38 technology, backed by a team of fax industry veterans to deliver a truly carrier-grade level of service that rivals the PSTN. We also have a team of engineers that work hard testing T.38-enabled equipment to make sure it works seamlessly with our Power-T.38 service.

Once a device is interop certified, we post a knowledge base 

article on our support site and publicize it on our 

We are pleased to announce that we have successfully completed interoperability testing with another line of Grandstream's products, its UCM series IP PBXs. Grandstream Networks, Inc. has offered SIP Unified Communications solutions since 2002, and its products have been recognized for their quality, reliability, and innovation. Specifically, the Grandstream IP PBXs allow businesses to unify multiple communication technologies, such as voice, video calling, video conferencing, video surveillance, data tools, mobility options and facility access management onto one common network that can be managed and/or accessed remotely.

Grandstream's UCM series IP PBXs include a suite of devices that can anchor a business's communications network solution and support from 500 to 2000 users. The Grandstream UCM6100 series and UCM6200 series IP PBXs are similar, but the UCM6200 series can support more users (up to 800) and more concurrent calls (up to 100), The Grandstream UCM6510 IP PBX supports E1, T1, and J1 networks and offers scalability by supporting up to 2000 users. These secure and reliable devices deliver unified communications features without any licensing fees, costs-per-feature, or recurring fees.

Like other Grandstream products, the IP PBXs include extensive support for T.38. That means they can connect directly to our fax-optimized SIP trunks using our Power-T.38 service. Or these products can talk to us through

We are pleased to announce that we have successfully completed interoperability testing with Grandstream’s HT800 series ATAs. Grandstream Networks, Inc. has offered SIP Unified Communications solutions since 2002, and its products have been recognized for their quality, reliability, and innovation. The HT series of ATAs delivers powerful VoIP technology and routing capabilities to home and office environments, and allows users to successfully connect their analog devices to a manageable, robust network. Built using Grandstream’s market-leading SIP ATA/gateway technology, with millions of units successfully deployed worldwide, these powerful ATAs feature exceptional voice quality in various applications and environments.

The HT800 series of ATAs includes 4 different models, giving customers the flexibility to choose the right device

Do you remember the good old days, when things were simple? In the early days of fax, you used physical fax boards and servers, connected to real, tangible ISDN PRI T1 lines. Traditional phone lines were circuit-switched, which is a fancy way of saying they were optimized to deliver perfect audio every time, independent of conditions. Faxing was error free. The physical hardware worked well.

Then came progress. And three things happened to disrupt the status quo:

We are pleased to announce that we have successfully completed interoperability testing with AudioCodes’ MediaPack 1xx series of analog media gateways. AudioCodes designs, develops and sells advanced Voice-over-IP (VoIP), converged VoIP and Data networking products and communications applications for Service providers and Enterprises. AudioCodes is a VoIP technology market leader focused on converged VoIP and data communications and its products are deployed globally in Broadband, Mobile, Cable, and Enterprise networks.

AudioCodes’ MediaPack 1xx series gateways are cost-effective, stand-alone VoIP gateways that provide superior voice technology for connecting legacy telephones, fax machines, and PBX systems with IT telephony networks and IP-based PBX systems. These gateways have up to 24 analog ports, provide superior voice technology, and offer a rich set of advanced telephony features. They are also T.38 fax compliant, which makes them a great fit