--- title: "T38Fax Blog: Fax over IP Insights" description: Subscribe to the T38Fax blog and get email updates. Stay on top of fax industry news and learn about the nuances of T.38 faxing from our industry experts. image: https://www.t38fax.com/images/t38fax-og-default.jpg --- [Skip to main content](https://blog.t38fax.com/all#blog-content) [![T38Fax](https://www.t38fax.com/images/Logo_Large.svg)](https://www.t38fax.com/) - Who We Serve - [Enterprise Fax Servers RightFax, HylaFAX, GFI FaxMaker](https://www.t38fax.com/solutions/enterprise-fax-servers/) - [Voice Service Providers T.38 offload for ITSPs & UCaaS](https://www.t38fax.com/solutions/voice-service-providers/) - [Business Fax Connectivity ATAs, IP-PBXs, fax machines](https://www.t38fax.com/solutions/business-fax-connectivity/) - [Our Solution](https://www.t38fax.com/power-t38/) - [Why T38Fax](https://www.t38fax.com/why-t38fax/) - [Pricing](https://www.t38fax.com/pricing/) - Resources - [Compatibility List T.38-certified devices & setup guides](https://www.t38fax.com/compatibility/) - [Knowledge Base Setup guides, FAQs & troubleshooting](https://helpdesk.t38fax.com/hc/en-us/) - [Blog Fax technology & industry insights](https://blog.t38fax.com/) - [Security & Compliance HIPAA, SOC 2, encryption options](https://www.t38fax.com/security/) - Company - [About Us Our story and team](https://www.t38fax.com/about-us/) - [Testimonials See our customer reviews](https://www.t38fax.com/testimonials/) - [Partners Reseller & integration partnerships](https://www.t38fax.com/partners/) - [Contact Us Sales, support & general enquiries](https://www.t38fax.com/contact/) - [Careers Open positions at T38Fax](https://www.t38fax.com/careers/) [Customer Portal](https://my.t38fax.com/) [Start Free Trial](https://my.t38fax.com/signup) - Who We Serve - [Enterprise Fax Servers](https://www.t38fax.com/solutions/enterprise-fax-servers/) - [Voice Service Providers](https://www.t38fax.com/solutions/voice-service-providers/) - [Business Fax Connectivity](https://www.t38fax.com/solutions/business-fax-connectivity/) - [Our Solution](https://www.t38fax.com/power-t38/) - [Why T38Fax](https://www.t38fax.com/why-t38fax/) - [Pricing](https://www.t38fax.com/pricing/) - Resources - [Compatibility List](https://www.t38fax.com/compatibility/) - [Knowledge Base](https://helpdesk.t38fax.com/hc/en-us/) - [Blog](https://blog.t38fax.com/) - [Security & Compliance](https://www.t38fax.com/security/) - Company - [About Us](https://www.t38fax.com/about-us/) - [Testimonials](https://www.t38fax.com/testimonials/) - [Partners](https://www.t38fax.com/partners/) - [Contact Us](https://www.t38fax.com/contact/) - [Careers](https://www.t38fax.com/careers/) - [Customer Portal](https://my.t38fax.com/) [Start Free Trial](https://my.t38fax.com/signup) # T38Fax Blog Fax technology, interoperability certifications, and industry insights. Tech Tips Nov 4, 2026 ## [Your POTS Lines Are Going Away: A Fax Migration Guide](https://blog.t38fax.com/your-pots-lines-are-going-away-a-fax-migration-guide) [![POTS to SIP Migration](https://blog.t38fax.com/hubfs/featured-image-pots-lines-going-away-1200x630.png)](https://blog.t38fax.com/your-pots-lines-are-going-away-a-fax-migration-guide) On November 15, AT&T can begin disconnecting copper phone service for about 90,000 business and residential customers in 18 states. The FCC approved the request in January, and more filings are moving through the same process. If your office still has fax machines plugged into wall jacks, some of those lines are likely on the list. Fax is the line most offices forget about until it stops working. This guide covers what's changing, what the replacement line usually does to fax, and the steps to take before a notice lands on your desk. Josh Primiano · [Read more about Your POTS Lines Are Going Away: A Fax Migration Guide](https://blog.t38fax.com/your-pots-lines-are-going-away-a-fax-migration-guide) Tech Tips Oct 15, 2026 ## [Is Fax More Secure Than Email? What T.38 Gets Right](https://blog.t38fax.com/is-fax-more-secure-than-email-what-t.38-gets-right) [![Is Fax More Secure Than Email? What T.38 Gets Right](https://blog.t38fax.com/hubfs/featured-image-fax-vs-email-security-1200x630.png)](https://blog.t38fax.com/is-fax-more-secure-than-email-what-t.38-gets-right) In 2025, 170 healthcare organizations reported email-related breaches to the U.S. Department of Health and Human Services. In a separate Paubox survey of healthcare IT leaders, 58% said their organization had been breached through email in the past 24 months, and 23% said it had happened more than once. Encryption controls only work when people use them. In the same survey, more than a third of organizations that require a portal login to read encrypted email said clinical staff bypass it. That raises a question we hear often from the organizations we work with: is fax actually more secure? The short answer is yes, and the reasons are architectural, not sentimental. But the full answer depends on what kind of fax you're talking about. Josh Primiano · [Read more about Is Fax More Secure Than Email? What T.38 Gets Right](https://blog.t38fax.com/is-fax-more-secure-than-email-what-t.38-gets-right) Tech Tips Oct 9, 2026 ## [Why RightFax Fax Failures Aren't a RightFax Problem](https://blog.t38fax.com/why-rightfax-fax-failures-arent-a-rightfax-problem) [![RightFax Failures](https://blog.t38fax.com/hubfs/featured-image-v2-1.png)](https://blog.t38fax.com/why-rightfax-fax-failures-arent-a-rightfax-problem) We've spent over two decades building fax server software. Our parent company, [iFAX Solutions](https://www.ifax.com/), ships [HylaFAX Enterprise](https://helpdesk.t38fax.com/hc/en-us/articles/360052596492) to organizations that depend on fax at scale. We know what these systems can do when they're connected to infrastructure that respects T.30, the fax protocol. So when a new customer tells us their fax server "doesn't work over SIP," we already know the shape of the story. Sometimes it's a RightFax or HylaFAX Enterprise installation that ran fine for years on POTS or PRI, migrated to a SIP trunk, and started failing. Sometimes it's a brand-new deployment, built on SIP from day one, with no legacy fax history to compare against. Either way, the pattern is the same: pages drop mid-transmission, calls connect but nothing comes through, and the SIP provider's advice is to lower the baud rate, turn off ECM, and try again. The fax server was never the problem. Josh Primiano · [Read more about Why RightFax Fax Failures Aren't a RightFax Problem](https://blog.t38fax.com/why-rightfax-fax-failures-arent-a-rightfax-problem) Insider Sep 30, 2026 ## [What Lumen's Voice Exit Means for Your Fax Lines](https://blog.t38fax.com/what-lumen-s-voice-exit-means-for-your-fax-lines) [![What Lumen's Voice Exit Means for Your Fax Lines](https://blog.t38fax.com/hubfs/lumen-voice-exit-featured-v2.png)](https://blog.t38fax.com/what-lumen-s-voice-exit-means-for-your-fax-lines) A customer told us about it before we read about it. Lumen, the carrier behind the CenturyLink, Level 3, Qwest, and Embarq brands, has stopped selling and renewing business voice service. If your company has phone lines on Lumen, your contract now has an end date with no renewal behind it. Most of the coverage so far is about replacing the phones. This post is about the fax lines, which tend to get one bullet point in a migration plan and then cause most of the trouble after cutover. Josh Primiano · [Read more about What Lumen's Voice Exit Means for Your Fax Lines](https://blog.t38fax.com/what-lumen-s-voice-exit-means-for-your-fax-lines) Interoperability Aug 13, 2025 ## [FaxTalk: A Cost-Effective T.38 FoIP Solution for Windows](https://blog.t38fax.com/faxtalk-a-cost-effective-t38-foip-solution-for-windows) [![FaxTalk: A Cost-Effective T.38 FoIP Solution for Windows](https://blog.t38fax.com/hubfs/faxtalk-interop.png)](https://blog.t38fax.com/faxtalk-a-cost-effective-t38-foip-solution-for-windows) Looking for a cost-effective way to modernize your fax communications in a primarily MS Windows-based environment? Look no further. A pioneer in the voice and fax industry since 1989, Thought Communications markets FaxTalk as a modestly priced, yet modern and feature-rich T.38-enabled faxing solution. FaxTalk comes in three variants: FaxTalk FaxCenter Pro, FaxTalk Messenger Pro, and FaxTalk Multiline Server. Each caters to a specific set of needs (see [comparison matrix](https://www.faxtalk.com/faxtalk-product-features/)), but all deliver advanced fax, voice messaging, and client/server capabilities in a user-friendly application that works well with our Power-T.38 SIP trunking service. Holly Caldwell · [Read more about FaxTalk: A Cost-Effective T.38 FoIP Solution for Windows](https://blog.t38fax.com/faxtalk-a-cost-effective-t38-foip-solution-for-windows) Interoperability Jul 3, 2025 ## [Grandstream HT801/802 v2 series ATAs Officially Certified](https://blog.t38fax.com/grandstream-ht801/802-v2-series-atas-officially-certified) [![Grandstream HT801/802 v2 series ATAs Officially Certified](https://blog.t38fax.com/hubfs/HT802V2_1-interop.png)](https://blog.t38fax.com/grandstream-ht801/802-v2-series-atas-officially-certified) Trusted and deployed by some of the world’s largest service providers, Grandstream’s SIP unified communication solutions have been known for quality, reliability, and innovation since 2002. Enter the company’s newest addition to its ATA catalogue—the HT801/802 v2 series—an ultra-compact device which exemplifies the quality, reliability, and innovation that customers have come to expect from Grandstream. Much like its predecessor, the HT801/802 v2 delivers powerful VoIP technology and routing capabilities and is ideal for both home and office environments, allowing users to successfully connect their analog devices to a manageable, robust network. Holly Caldwell · [Read more about Grandstream HT801/802 v2 series ATAs Officially Certified](https://blog.t38fax.com/grandstream-ht801/802-v2-series-atas-officially-certified) Interoperability Mar 11, 2025 ## [Cisco ATA 191 and ATA 192 Certified for T.38 Fax](https://blog.t38fax.com/cisco-ata-191-and-ata-192-multiplatform-atas-officially-certified) [![Cisco ATA 191 and ATA 192 Certified for T.38 Fax](https://blog.t38fax.com/hubfs/cisco-ata-191-interop.png)](https://blog.t38fax.com/cisco-ata-191-and-ata-192-multiplatform-atas-officially-certified) Cisco has released the next-generation replacement of the venerable [SPA112 ATA,](https://helpdesk.t38fax.com/hc/en-us/articles/360053046831-Cisco-SPA112-2-Port-Phone-Adapter) one of the company's most widely deployed ATAs which was [declared EOL (End of Life)](https://www.cisco.com/c/en/us/products/collateral/unified-communications/small-business-voice-gateways-ata/eos-eol-notice-c51-743206.html) in the summer of 2020. The [ATA 191-MPP and ATA 192-MPP](https://www.cisco.com/c/en/us/products/unified-communications/ata-190-series-analog-telephone-adapters/index.html) are part of Cisco’s line of best-in-class small business voice gateways and ATAs, designed to support office or residential communication needs. The underlying technology has a strong pedigree in the SIP industry, having started out in the early days as Sipura Technology, which was wisely acquired by Cisco and branded as Linksys, then eventually promoted to the official Cisco brand. Holly Caldwell · [Read more about Cisco ATA 191 and ATA 192 Certified for T.38 Fax](https://blog.t38fax.com/cisco-ata-191-and-ata-192-multiplatform-atas-officially-certified) Tech Tips Mar 5, 2025 ## [The Stubborn Persistence of Fax](https://blog.t38fax.com/stubborn-persistence-of-fax) [![image.png](https://blog.t38fax.com/hubfs/image.png)](https://blog.t38fax.com/stubborn-persistence-of-fax) I used to feel defensive when people asked me what I did for a living. I suppose it should have come as no surprise that people would do a double take when I answered. After all, I've built a business around a technology that is now considered obsolete by most, and was thought to be in decline even in 2002 when I began. Hello, my name is Darren, and I am a Fax Entrepreneur. No, you didn't hear me wrong, I'm a card-carrying member of the facsimile fan club. I have been since 1992 when, while a PhD student at the University of Oxford, I assumed the persona of 'Arlington Hewes' of The Phone Company (TPC.INT) and began to learn about [HylaFAX](https://www.hylafax.org) (then FlexFax) ... industrial software for sending massive amounts of faxes. I'm sure many of you can look back on pivotal times in your lives ... a time when many doors are open and choices have to be made, decisions that lead to everything that follows. This was one such time. So why would anyone in their right mind base a business on fax, you might ask? And if they had made such a mistake, how could they possibly still be doing it? Darren Nickerson · [Read more about The Stubborn Persistence of Fax](https://blog.t38fax.com/stubborn-persistence-of-fax) Insider Apr 25, 2019 ## [T38Fax Featured in Telecom Reseller Podcast](https://blog.t38fax.com/t38fax-featured-in-telecom-reseller-podcast) [![T38Fax\_Logo-1](https://blog.t38fax.com/hubfs/T38Fax_Logo-1.png)](https://blog.t38fax.com/t38fax-featured-in-telecom-reseller-podcast) ## 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. Darren Nickerson · [Read more about T38Fax Featured in Telecom Reseller Podcast](https://blog.t38fax.com/t38fax-featured-in-telecom-reseller-podcast) Tech Tips Sep 24, 2018 ## [Why Power-T.38 from T38fax.com?](https://blog.t38fax.com/why-power-t38-t38fax-com) [![Why Power-T.38 from T38fax.com?](https://blog.t38fax.com/hs-fs/hub/447672/file-2528832764.png)](https://blog.t38fax.com/why-power-t38-t38fax-com) Our [Power-T.38](https://www.t38fax.com/products/) product is similar to the SIP trunks you might purchase from another VoIP Service provider, with one significant difference - our SIP trunks are not only guaranteed to offer astoundingly reliable T.38 Fax Over IP call termination and origination, but that's really **all** they're meant to do. These purpose-built trunks are also competitively priced, making them suitable to everyone from the largest telecommunications carriers to the single home office fax machine connected with an [analog telephone adapter (ATA)](https://www.t38fax.com/support/knowledgebase/ata/). We understand that you have many choices in today's crowded telecommunications market, so here are a few reasons you should give Power-T.38 a try: 1. We do T.38 correctly. Almost nobody else does. We know, we looked! 2. We support facsimile [ECM (Error Correction Mode)](https://www.t38fax.com/support/knowledgebase/ecm/). You need it, and we insist on it. 3. The largest SIP carriers don't understand T.38 at all - they're voice people. 4. T.38 Fax Over IP is an elegant, extremely effective solution to a very real problem. 5. It's [free to try us](https://www.t38fax.com/signup/), we even give you $25 and unlimited support from true fax experts. We'll discuss each of those points in more detail, below.  Darren Nickerson · [Read more about Why Power-T.38 from T38fax.com?](https://blog.t38fax.com/why-power-t38-t38fax-com) Insider May 22, 2018 ## [T.38 Rescue: Free Fax over IP Consultation](https://blog.t38fax.com/t.38-rescue) [![t38-rescue-icon-blk](https://blog.t38fax.com/hubfs/t38-rescue-icon-blk.png)](https://blog.t38fax.com/t.38-rescue) 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. Darren Nickerson · [Read more about T.38 Rescue: Free Fax over IP Consultation](https://blog.t38fax.com/t.38-rescue) Interoperability Mar 8, 2018 ## [FreeSWITCH Officially Certified](https://blog.t38fax.com/freeswitch-officially-certified) [![freeswitch-certified.png](https://blog.t38fax.com/hubfs/freeswitch-certified.png)](https://blog.t38fax.com/freeswitch-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with [FreeSWITCH](https://freeswitch.org), 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](https://www.asterisk.org) 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,  Darren Nickerson · [Read more about FreeSWITCH Officially Certified](https://blog.t38fax.com/freeswitch-officially-certified) Interoperability Feb 20, 2018 ## [FusionPBX Officially Certified](https://blog.t38fax.com/fusionpbx-officially-certified) [![fusionpbx-certified.png](https://blog.t38fax.com/hubfs/fusionpbx-certified.png)](https://blog.t38fax.com/fusionpbx-officially-certified) We’re excited to announce that we've successfully completed interoperability testing with [FusionPBX](https://www.fusionpbx.com), a popular web front-end to [FreeSWITCH](https://freeswitch.org), 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 Darren Nickerson · [Read more about FusionPBX Officially Certified](https://blog.t38fax.com/fusionpbx-officially-certified) Tech Tips Jan 2, 2018 ## [ECM - T.38's Dirty Little Secret (And Why It Matters)](https://blog.t38fax.com/blog/ecm-t38-dirty-little-secret) [![ECM - T.38's Dirty Little Secret (And Why It Matters)](https://blog.t38fax.com/hubfs/Blog/Got-ECM-800x600.jpg)](https://blog.t38fax.com/blog/ecm-t38-dirty-little-secret) I'm going to let you in on a secret: it’s impossible to fax reliably over most VoIP services (SIP trunks) being sold these days, no matter how well you understand and implement T.38 Fax Over IP (FoIP), because the product you’re buying is fundamentally broken. As crazy as it sounds, it’s missing the one feature that makes sure the other side receives an exact copy of your image: [Error Correction Mode (ECM)](https://helpdesk.t38fax.com/hc/en-us/articles/360052596012-ECM). Each day, millions of fax pages are sent via T.38 circuits that [don’t have ECM enabled,](https://foip.t38fax.com/ecm-self-test) and everyone just kind of hopes the fax pages make it to the other side intact. Sounds crazy? We agree!! ### What is ECM and why is it important? Fax is a page-by-page transmission method, usually done over standard telephone lines. The image data from each page is converted into an audio representation of the page, the audio is sent to the other side, and when both parties are ready, they move on to the next page. Now, the clever people who invented the fax protocol realized that phone lines are imperfect and that every once in a while there will be a pop, crackle, hum or hiss that distorts that audio signal, leading to loss of fax page image data. That's where ECM comes in – at the end of each page, the sender and the receiver compare notes, check for any missing or distorted page image data, and then selectively re-transmit only that data. Again they compare notes, and if there's still missing data they repeat the process, only moving to the next page when the current page is 100% correct. When ECM is not available, however, the end-of-page procedure is quite different, and error checking and error correction ability is limited. Darren Nickerson · [Read more about ECM - T.38's Dirty Little Secret (And Why It Matters)](https://blog.t38fax.com/blog/ecm-t38-dirty-little-secret) Insider Dec 18, 2017 ## [T38Fax and Telinta: T.38 Fax for VoIP Service Providers](https://blog.t38fax.com/telintapartnership) [![T38Fax and Telinta: T.38 Fax for VoIP Service Providers](https://blog.t38fax.com/hubfs/Telinta-Logo-web.gif)](https://blog.t38fax.com/telintapartnership) 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](https://www.telinta.com), 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](https://www.prweb.com/releases/2017/12/prweb14975888.htm), we can deliver reliable fax solutions to VoIP service providers. Darren Nickerson · [Read more about T38Fax and Telinta: T.38 Fax for VoIP Service Providers](https://blog.t38fax.com/telintapartnership) Interoperability Dec 14, 2017 ## [Certify Your T.38-Enabled Device with T38Fax](https://blog.t38fax.com/certify-your-t.38-enabled-device-with-t38fax) [![Interop.png](https://blog.t38fax.com/hubfs/Interop.png)](https://blog.t38fax.com/certify-your-t.38-enabled-device-with-t38fax) 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  Darren Nickerson · [Read more about Certify Your T.38-Enabled Device with T38Fax](https://blog.t38fax.com/certify-your-t.38-enabled-device-with-t38fax) Interoperability Nov 14, 2017 ## [Grandstream UCM Series IP PBXs Officially Certified](https://blog.t38fax.com/grandstream-ucm-series-ip-pbxs-officially-certified) [![UCM6100\_combination\_straight-interop-certified.png](https://blog.t38fax.com/hubfs/UCM6100_combination_straight-interop-certified.png)](https://blog.t38fax.com/grandstream-ucm-series-ip-pbxs-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with another line of [Grandstream](https://www.grandstream.com)'s products, [its UCM series IP PBXs](https://www.grandstream.com/products/ip-pbxs/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](https://www.grandstream.com/products/ip-pbxs/ucm-series-ip-pbxs) and [UCM6200 series IP PBXs](https://www.grandstream.com/products/ip-pbxs/ucm-series-ip-pbxs/product/ucm6200-series) 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](https://www.grandstream.com/products/ip-pbxs/ucm-series-ip-pbxs/product/ucm6510) 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 Darren Nickerson · [Read more about Grandstream UCM Series IP PBXs Officially Certified](https://blog.t38fax.com/grandstream-ucm-series-ip-pbxs-officially-certified) Interoperability Aug 17, 2017 ## [Grandstream HT800 Series ATAs Officially Certified](https://blog.t38fax.com/grandstream-ht800-series-atas-officially-certified) [![Grandstream HT800 Series ATAs Officially Certified](https://blog.t38fax.com/hubfs/social-suggested-images/HT802V2_1-interop-2.png)](https://blog.t38fax.com/grandstream-ht800-series-atas-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with Grandstream’s HT800 series ATAs. [Grandstream Networks, Inc.](https://www.grandstream.com) 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 Darren Nickerson · [Read more about Grandstream HT800 Series ATAs Officially Certified](https://blog.t38fax.com/grandstream-ht800-series-atas-officially-certified) Insider Aug 15, 2017 ## [T.38 Fax over IP for Independent Software Vendors](https://blog.t38fax.com/t38faxs-foip-solution-delivers-for-independent-software-vendors) [![T.38 Fax over IP for Independent Software Vendors](https://blog.t38fax.com/hubfs/Fax%20Servers.png)](https://blog.t38fax.com/t38faxs-foip-solution-delivers-for-independent-software-vendors) 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: Darren Nickerson · [Read more about T.38 Fax over IP for Independent Software Vendors](https://blog.t38fax.com/t38faxs-foip-solution-delivers-for-independent-software-vendors) Interoperability Jul 17, 2017 ## [AudioCodes MediaPack 1xx Gateways Officially Certified](https://blog.t38fax.com/audiocodes-mediapack-1xx-gateways-officially-certified) [![audiocodes-certified.png](https://blog.t38fax.com/hubfs/audiocodes-certified.png)](https://blog.t38fax.com/audiocodes-mediapack-1xx-gateways-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with AudioCodes’ MediaPack 1xx series of analog media gateways. [AudioCodes](https://www.audiocodes.com) 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  Darren Nickerson · [Read more about AudioCodes MediaPack 1xx Gateways Officially Certified](https://blog.t38fax.com/audiocodes-mediapack-1xx-gateways-officially-certified) Insider Jul 14, 2017 ## [T38Fax and VoIP Innovations Partner on Fax over IP](https://blog.t38fax.com/t38fax-incorporated-and-voip-innovations-a-partnership-worth-experiencing) [![T38Fax and VoIP Innovations Partner on Fax over IP](https://blog.t38fax.com/hubfs/Voip%20innovations%20fax%20pic.png)](https://blog.t38fax.com/t38fax-incorporated-and-voip-innovations-a-partnership-worth-experiencing) Guest author, Natalie DeCario, is the Marketing Manager at [VoIP Innovations](https://voipinnovations.com), a wholesale VoIP provider that specializes in providing Origination, Termination, E911, Hosted Billing, Fraud Detection, and an End User Portal. Some will argue that the key to an ITSP’s (Internet Telephony Service Provider) success is to add the combination of choice, automation, and control to their business strategy. This is especially important when trying to reduce the time it takes to keep up with the clerical, yet necessary tasks such as billing customers, porting DIDs, and originating and terminating DIDs. While these tasks keep an ITSP afloat, they are also causing owners to slow down their operations and over clutter their agenda with tactical efforts that take away from strategy and bottom line. Fortunately, VoIP Innovations has created a platform that allows ITSPs to use technology to receive the choice,  Josh Primiano · [Read more about T38Fax and VoIP Innovations Partner on Fax over IP](https://blog.t38fax.com/t38fax-incorporated-and-voip-innovations-a-partnership-worth-experiencing) Insider Jun 29, 2017 ## [NetGen SmartATA and T38Fax: Real-Time Fax over IP](https://blog.t38fax.com/t38fax-and-netgen-communications-a-solution-for-real-time-fax-over-ip) [![netgen blog post pic.png](https://blog.t38fax.com/hubfs/netgen%20blog%20post%20pic.png)](https://blog.t38fax.com/t38fax-and-netgen-communications-a-solution-for-real-time-fax-over-ip) Guest author, Mike Coffee, is the President and CEO of [NetGen Communications](https://www.netgencommunications.com) (NetGen), a spin-off of Commetrex Corporation. NetGen produced the SmartATA® through their partnership with New Rock Technologies. When is a fax not a fax? Josh Primiano · [Read more about NetGen SmartATA and T38Fax: Real-Time Fax over IP](https://blog.t38fax.com/t38fax-and-netgen-communications-a-solution-for-real-time-fax-over-ip) Interoperability Jun 7, 2017 ## [NetGen Smart ATAs Officially Certified](https://blog.t38fax.com/netgen-smart-atas-officially-certified) [![NetgenCert-1](https://blog.t38fax.com/hubfs/NetgenCert-1.png)](https://blog.t38fax.com/netgen-smart-atas-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with NetGen’s Smart ATAs. [NetGen Communications, Inc. (NetGen)](https://www.netgencommunications.com), a spin-off of Commetrex Corporation, is a provider of ATAs with patented Smart FoIP, gateways, IP and wireless/IP PBXs, and IP phones. Their Smart ATAs are equipped with Smart FoIP patented technology that finally makes FoIP calls as reliable as PSTN fax calls. In addition to innovative fax capabilities, the Smart ATAs also provide quality voice performance and a full range of calling features. NetGen found that serious problems with SIP negotiations for Fax over IP calls exist in the carrier-based networks. Since our SIP trunks were specifically optimized for FoIP, we are the only provider of reliable T.38 FoIP service. This makes us a natural fit with the Smart ATAs and their focus on reliable FoIP performance. After rigorous testing, our interop ninjas found that the Smart ATA’s excellent T.38 support, combined with our  Darren Nickerson · [Read more about NetGen Smart ATAs Officially Certified](https://blog.t38fax.com/netgen-smart-atas-officially-certified) Interoperability Jun 5, 2017 ## [Passport4000 Fax Component Officially Certified](https://blog.t38fax.com/passport-4000-messaging-system-officially-certified) [![Passport4000 Fax Component Officially Certified](https://blog.t38fax.com/hubfs/LaneTelecom.jpg)](https://blog.t38fax.com/passport-4000-messaging-system-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with [Lane Communications’ Passport4000](https://laneds.com/passport/) fax system component. Lane Telecommunications is a dedicated provider of integrated messaging solutions within Healthcare, Banking, and Commercial markets. It operates globally, with offices located in the USA, Singapore, and the UK. Lane is recognized as a leader in messaging and fax integration across financial, healthcare, and government bodies. It has a strong track record in implementing systems across 50 countries, providing professional services in all time zones. Passport4000 is at the heart of the Lane Telecommunications service offering and is its core messaging system. The Passport4000 offers integrated fax and messaging services accessed over the internet. Its fax system component includes Dialogic’s SR140 SIP stack, which supports T.38. But the challenge to offering dependable Fax over IP has been finding a reliable SIP trunk vendor. Dialogic was our first officially certified partner, and remains one of our most important partners to this day. Our SIP trunks were designed by fax industry experts to only offer T.38 Fax over IP call origination and termination. By including Dialogic’s industry-leading SR140 T.38 stack in their software and certifying Passport4000 with our Power-T.38 service, Lane Telecommunications Darren Nickerson · [Read more about Passport4000 Fax Component Officially Certified](https://blog.t38fax.com/passport-4000-messaging-system-officially-certified) Insider Jun 1, 2017 ## [T38Fax Joins Obihai's List of Compatible Service Providers](https://blog.t38fax.com/t38fax-joins-obihais-list-of-compatible-service-providers) [![OBiTALK-Link-Dev.jpg](https://blog.t38fax.com/hubfs/OBiTALK-Link-Dev.jpg)](https://blog.t38fax.com/t38fax-joins-obihais-list-of-compatible-service-providers) T38Fax is pleased to join Obihai’s list of compatible service providers. Obihai Technology is a leading manufacturer in the Voice over IP endpoint industry and maker of the best-selling OBi universal voice adapters and IP phones. They developed OBiTALK, a web portal and OBi configuration utility which helps OBi users configure devices and access applications. Within the OBiTALK portal, Obihai offers a list of compatible service providers, which allows users to easily configure an OBi phone adaptor or IP phone with their specific provider. Using the OBiTALK portal, OBi device owners can select their service provider from this list and enter their credentials. Once a selection is made, the device is automatically configured to work with the service provider, and calls can be made and received within minutes.  Service provider partners can also sign in to the OBiTALK ITSP Device Management Portal (DMP). This tool was designed for service providers, system integrators, and value-added resellers (VAR) to manage their OBi device deployments. It allows them to remotely and securely access and configure OBi devices from anywhere. When a service provider signs in to the OBiTALK portal, they can set up SIP registration and configure more advanced VoIP functions. This will eliminate the need to configure and re-package each device before sending it to the end user. T38Fax is proud to be the only FoIP-specific service provider on the OBiTALK compatible service provider list. Our SIP trunks were designed by fax industry experts to solely offer T.38 Fax over IP call origination and termination. We have tested our integration in the OBiTALK portal and found that it offers an easy and straightforward way to  Darren Nickerson · [Read more about T38Fax Joins Obihai's List of Compatible Service Providers](https://blog.t38fax.com/t38fax-joins-obihais-list-of-compatible-service-providers) Interoperability May 22, 2017 ## [Mediatrix 4100 Series Adaptors Officially Certified](https://blog.t38fax.com/mediatrix-4100-series-adaptors-officially-certified) [![MediaTrixCert-1](https://blog.t38fax.com/hubfs/MediaTrixCert-1.png)](https://blog.t38fax.com/mediatrix-4100-series-adaptors-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with Media5’s Mediatrix 4100 series adaptors and gateways. [Media5](https://www.m5technologies.com/) is a global supplier of multimedia communication solutions, offering a complete set of SIP-based products and technologies. They deliver IP Communications solutions to customers in over 75 countries throughout the world. Their family of products includes highly-capable customer premise equipment, such as IP gateways, session border controllers, virtual machine platforms, the suite of mobile solutions for media and collaboration tools, and the M5T family of secure SIP-based developer solutions. Media5 offers a family of ATAs/gateways that allows customers to connect to VoIP networks. The Mediatrix 4100 series VoIP adaptors, with up to 24 FXS ports, interconnect analog telephones, faxes, and modems into SIP based systems. These adaptors support T.38, and they offer clear channel fax and modem pass-through capabilities. So they can connect to us directly, or they can talk to us through any SIP infrastructure that knows how to do T.38 pass-thru (Asterisk, FreePBX, OpenSIPS, Kamailio, etc.). The Mediatrix 4100 series ATAs have been thoroughly tested by our interop ninjas and work seamlessly with our  Darren Nickerson · [Read more about Mediatrix 4100 Series Adaptors Officially Certified](https://blog.t38fax.com/mediatrix-4100-series-adaptors-officially-certified) Tech Tips May 18, 2017 ## [T38Fax - The FoIP Solution for Any Use Case Scenario](https://blog.t38fax.com/t38fax-solutions-for-typical-use-case-scenarios) [![T38Fax - The FoIP Solution for Any Use Case Scenario](https://blog.t38fax.com/hubfs/Single%20Fax%20ATA.png)](https://blog.t38fax.com/t38fax-solutions-for-typical-use-case-scenarios) If you're reading this blog, then you rely on FoIP in some way, and it's likely causing you headaches. Maybe you're a single ATA user trying to fax with your current carrier, but not having much luck. Perhaps you have a fax server that won't work consistently now that you've upgraded your phone network to VoIP. Or you're a service provider that can't seem to provide reliable FoIP to your customers and fax support is causing you nightmares. If you fit into any of these categories, then your business depends on FoIP, but you can't get it to work reliably. As you upgrade your communications infrastructure to SIP, fax support can get left behind. Finding a carrier that guarantees (and supports!!) T.38 on your service is almost impossible. If you’re a carrier or service provider, you know that successful T.38 requires significant investment in equipment and expertise and fax troubleshooting takes skill from seasoned fax experts. Luckily, we can help! T38Fax provides reliable faxing and premium support over our SIP trunks, which were specifically designed for T.38. Whether you’re a single fax user, a business with a fax server or IP-PBX, or a hosted VoIP or SIP trunk vendor, our Power-T.38 service can work for you. Find your use-case scenario below and see how. Darren Nickerson · [Read more about T38Fax - The FoIP Solution for Any Use Case Scenario](https://blog.t38fax.com/t38fax-solutions-for-typical-use-case-scenarios) Tech Tips May 15, 2017 ## [Take Advantage of Multi-DID Routing with Obihai ATAs/Gateways](https://blog.t38fax.com/take-advantage-of-multi-did-routing-with-obihai-atas/gateways) [![Take Advantage of Multi-DID Routing with Obihai ATAs/Gateways](https://blog.t38fax.com/hubfs/atas.png)](https://blog.t38fax.com/take-advantage-of-multi-did-routing-with-obihai-atas/gateways) Obihai Technology is a leading manufacturer in the Voice over IP industry and maker of the best-selling OBi universal voice adapters and IP phones. Their analog telephone adapters (ATAs) and gateways can bridge mobile, fixed line, and Internet telephone services. They also support T.38, an essential feature to ensure reliable faxing over SIP trunks. The OBi202, OBi302, OBi504vs, and OBi508vs are each equipped with multiple ports and are capable of connecting to more than one DID. If you are using one of these devices, you can take advantage of multi-DID routing, which can save you money and decrease the complexity of your configuration. You can consolidate a group of DIDs under a single SIP registration. This will give you the flexibility Darren Nickerson · [Read more about Take Advantage of Multi-DID Routing with Obihai ATAs/Gateways](https://blog.t38fax.com/take-advantage-of-multi-did-routing-with-obihai-atas/gateways) Interoperability May 11, 2017 ## [Asterisk Officially Certified](https://blog.t38fax.com/asterisk-officially-certified) [![Asterisk Officially Certified](https://blog.t38fax.com/hubfs/Asterisk-Interopped.png)](https://blog.t38fax.com/asterisk-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with [Asterisk](https://www.asterisk.org). Asterisk is a free and open source framework for building communications applications, like business phone systems, call distributors, VoIP gateways, and conference bridges. As open source software, it has been enhanced and tested by a global community of thousands. It is sponsored by [Digium](https://www.digium.com), and it is used by almost the entire Fortune 1000 list of customers. Some of our largest service providers have built their businesses on Asterisk and related open source telephony tools. But the challenge to offering dependable faxing has been finding a SIP trunk vendor who offers reliable T.38. Asterisk is known to work very well with our Power-T.38 products. Simply activate service with us, connect to our SIP trunk, and marvel at how well the faxing works. Our interop ninjas have been hard at work interop testing Asterisk. Their software has passed our rigorous testing requirements and made it to our Approved List. We've gathered our screen shots and recommended best practices and assembled them into our [Asterisk knowledge base article](https://helpdesk.t38fax.com/hc/en-us/articles/360052596072-Asterisk), which you can find here:  [![Asterisk Knowledge Base Article](https://no-cache.hubspot.com/cta/default/447672/08692a3e-4a99-4d5e-84c6-2a31d574a068.png)](https://cta-redirect.hubspot.com/cta/redirect/447672/08692a3e-4a99-4d5e-84c6-2a31d574a068) It really is just that easy. Simply use Power-T.38 as your underlying carrier for fax calls, and we'll take care of the T.38 for you. Just imagine getting rid of those headaches! Ready to put this to the test? Darren Nickerson · [Read more about Asterisk Officially Certified](https://blog.t38fax.com/asterisk-officially-certified) Insider May 2, 2017 ## [New Self-Care Portal Officially Launched](https://blog.t38fax.com/new-self-care-portal-officially-launched) [![portal.png](https://blog.t38fax.com/hubfs/portal.png)](https://blog.t38fax.com/new-self-care-portal-officially-launched) T38Fax is pleased to announce the launch of its new customer self-care portal. The portal has been completely redesigned as part of our ongoing commitment to enhance our customers' experience and provide outstanding support. We wanted the portal to be more intuitive, sleek, and user-friendly, and we also needed a modern foundation upon which to begin adding new features such as DID ordering, LNP porting and self-service trunk creation. Look for these new features to begin appearing in the coming months! The new portal launch follows the release of a preview that was sent to customers for feedback. We incorporated many customer suggestions and in the end we think you will agree that the new self-service website offers our customers a far superior online environment, with enhanced features and functionality. The new self-care portal will offer our customers: Darren Nickerson · [Read more about New Self-Care Portal Officially Launched](https://blog.t38fax.com/new-self-care-portal-officially-launched) Interoperability Apr 3, 2017 ## [Cisco SPA112 and SPA122 ATAs Officially Certified](https://blog.t38fax.com/cisco-spa112-and-spa122-atas-officially-certified) [![cisco\_spa112\_zoom-1](https://blog.t38fax.com/hubfs/cisco_spa112_zoom-1.png)](https://blog.t38fax.com/cisco-spa112-and-spa122-atas-officially-certified) T38Fax is pleased to announce that we have successfully completed interop testing with the Cisco SPA112 2-Port Phone Adapter and the Cisco SPA122 ATA with Router. We're especially excited about this certification since many of the service providers we speak to on a daily basis have already standardized on this platform and have large preexisting deployments of these devices in the field. The device's T.38 support is excellent, but like all T.38 devices they're only as good as the service they're connected to. That's where we come in (see below for links to our knowledge base articles)!  [Cisco](https://www.cisco.com) itself doesn't need much of an introduction, of course. These ATA’s are part of Cisco’s line of best-in-class small business voice gateways and ATAs, designed to support office or residential communication needs. The undrlying technology has a strong pedigree in the SIP industry, having started out in the early days as Sipura Technology, which was wisely acquired by Cisco and branded as Linksys, then eventually promoted to the official Cisco brand. They are compatible with all industry voice and data standards and common telephone features such as caller ID, call waiting, and voice mail. Fortunately, the Cisco adapters also have a very mature T.38 stack, an essential feature to ensure reliable faxing over SIP trunks. [Most VoIP service providers struggle to provide a stable, reliable solution for fax.](https://blog.t38fax.com/why-power-t38-t38fax-com) Our Power-T.38 SIP trunks, combined with Cisco's ATAs are a powerful solution to this problem, and in our experience result in happy Darren Nickerson · [Read more about Cisco SPA112 and SPA122 ATAs Officially Certified](https://blog.t38fax.com/cisco-spa112-and-spa122-atas-officially-certified) Insider Mar 29, 2017 ## [Service Provider T.38 Offload - We Want Your FoIP!](https://blog.t38fax.com/service-provider-offload-model) [![Service Provider T.38 Offload - We Want Your FoIP!](https://blog.t38fax.com/hubfs/Service%20Provider%20Offload%20Model.png)](https://blog.t38fax.com/service-provider-offload-model) If you've found this article there's a good chance you're a hosted VoIP or SIP trunk vendor whose customers are trying to send faxes, unsuccessfully, over your network. Perhaps your support team is demoralized by the constant barrage of cases being opened by customers who found out just a little too late that VoIP and fax don't play nicely together? Do you wish you could offer T.38 FoIP that actually worked, without the technical support burden? Do you have customers that are frustrated by your lack of fax support? Are you afraid those customers will take all of their business to a competitor who not only advertises support for T.38 but who can actually deliver the goods? What if I said this could be you? And that after one of the easiest configuration changes you've ever experienced, you'd never have to worry about fax again. Sound too good to be true? It's not. Darren Nickerson · [Read more about Service Provider T.38 Offload - We Want Your FoIP!](https://blog.t38fax.com/service-provider-offload-model) Interoperability Feb 27, 2017 ## [Grandstream GXW400x FXS Series Gateways Officially Certified](https://blog.t38fax.com/grandstream-gxw400x-fxs-series-gateways-officially-certified) [![GXW4000 Series T38Fax.com Interop Certified.jpg](https://blog.t38fax.com/hubfs/GXW4000%20Series%20T38Fax.com%20Interop%20Certified.jpg)](https://blog.t38fax.com/grandstream-gxw400x-fxs-series-gateways-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with Grandstream GXW4004 and GXW4008 gateways. [Grandstream Networks, Inc.](https://www.grandstream.com) has offered SIP Unified Communications solutions since 2002. Their open standard SIP-based products offer broad interoperability throughout the industry and have been recognized for their quality, reliability, and innovation. The Grandstream GXW400x FXS series gateways enable businesses to create seamless office environments, integrate traditional phones and phone systems into a VoIP network, and efficiently manage communication costs. They are designed for interoperability with leading IP-PBXs, Softswitches, and most SIP-based environments. Grandstream's 4 and 8-port GXW gateways are an affordable yet powerful choice for customers wanting to connect up to eight (8) analog fax machines to our Power-T.38 service. As with most SIP ATAs/gateways, they can connect to us directly but they can also talk to us through any SIP infrastructure that knows how to do T.38 pass-thru ([Asterisk](https://www.asterisk.org), [FreePBX](https://www.freepbx.org), [OpenSIPS](https://www.opensips.org), [Kamailio](https://www.kamailio.org/w/) etc). The GXWs are capable of routing incoming faxes via the called number (in other words, the incoming DID), which is such a useful feature that we've broken it out into a [separate knowledge base article](https://helpdesk.t38fax.com/hc/en-us/articles/360052596932-Grandstream-GXW4008).  The Grandstream GXW400x FSX series gateways have been thoroughly tested by our interop ninjas and work seamlessly with our Power-T.38 Fax over IP service. We've gathered our screen shots and recommended best practices and assembled them into our Grandstream GXW400x FXS series Knowledge Base Articles, which you can find here: | [![GXW4004 Knowledge Base Article](https://no-cache.hubspot.com/cta/default/447672/85d3c2a7-cc23-45aa-b792-b7c144ebfa8d.png)](https://cta-redirect.hubspot.com/cta/redirect/447672/85d3c2a7-cc23-45aa-b792-b7c144ebfa8d) | [![GXW4008 Knowledge Base Article](https://no-cache.hubspot.com/cta/default/447672/5bbcd8f6-1699-4dcb-a0cf-d5a5eb459433.png)](https://cta-redirect.hubspot.com/cta/redirect/447672/5bbcd8f6-1699-4dcb-a0cf-d5a5eb459433) | | --- | --- | Ready to put us to the test? Darren Nickerson · [Read more about Grandstream GXW400x FXS Series Gateways Officially Certified](https://blog.t38fax.com/grandstream-gxw400x-fxs-series-gateways-officially-certified) Interoperability Feb 22, 2017 ## [FreePBX Officially Certified](https://blog.t38fax.com/freepbx-officially-certified) [![FreePBX-Raw.png](https://blog.t38fax.com/hubfs/FreePBX-Raw.png)](https://blog.t38fax.com/freepbx-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with [FreePBX](https://www.freepbx.org), a product of [Sangoma Technologies](https://www.sangoma.com). FreePBX is a web-based open source GUI (graphical user interface) that controls and manages [Asterisk](https://www.asterisk.org) (PBX), an open source communication server. It was written by a community of developers and contributors who work to make phone system software functional and easy to use. With over 1 million production systems in over 200 countries, FreePBX is the most widely deployed open source PBX platform in use across the world.  Fax is a chronic annoyance for FreePBX operators seeking to offer Unified Communications (UC) services to their customers, or for IT administrators looking to base their company's phone system on FreePBX. It's a shame, too, Darren Nickerson · [Read more about FreePBX Officially Certified](https://blog.t38fax.com/freepbx-officially-certified) Interoperability Feb 6, 2017 ## [NetSapiens Officially Certified](https://blog.t38fax.com/netsapiens-officially-certified) [![NetSapiens Officially Certified](https://blog.t38fax.com/hubfs/netsapiens-1.png)](https://blog.t38fax.com/netsapiens-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with NetSapiens. NetSapiens provides advanced VoIP solutions to the industry's leading service providers. NetSapiens' SnapSolution allows service providers to offer more value to their customers and increase ROI. Its solutions include hosted PBX/Web centrex, unified communications, SIP trunking, security and cost control, user portals, device provisioning, contact center solutions, geo-diversity and high availability, API, and more. NetSapiens engineers have worked closely with T38Fax to jointly document a configuration that will permit service providers to offload their T.38 Fax over IP traffic to us. This will allow the service provider to claim T.38 support, and it will be completely transparent to their customers. To learn more, see our [knowledge base article](https://helpdesk.t38fax.com/hc/en-us/articles/360052596272-NetSapiens). Both T38Fax and NetSapiens will be at ITEXPO in Ft. Lauderdale, February 8-10. If you're in the area, feel free to come and discuss our joint solution. We are even offering [free Expo Plus Passes](https://blog.t38fax.com/join-us-at-itexpo-east-2017)! For more information on NetSapiens and their VoIP solutions, visit their [website](https://www.netsapiens.com). Don't have a T38Fax account? Darren Nickerson · [Read more about NetSapiens Officially Certified](https://blog.t38fax.com/netsapiens-officially-certified) Interoperability Feb 2, 2017 ## [Fax Voip T38 Fax & Voice Officially Certified](https://blog.t38fax.com/fax-voip-t38-fax-voice-officially-certified) [![Draft1-Faxvoip-1](https://blog.t38fax.com/hubfs/Draft1-Faxvoip-1.png)](https://blog.t38fax.com/fax-voip-t38-fax-voice-officially-certified) We are pleased to announce that we have successfully completed interoperability testing with [Fax Voip T38 Fax & Voice software](https://www.t38faxvoip.com). Fax Voip is a Windows based software that provides a full-featured SIP/H.323 softphone for Voice over IP (VoIP) calling. It also provides full functionality for sending & receiving facsimile transmissions via T.38 & G.711. From the perspective of your fax or voice application, it acts as a Voice/Fax modem, installing Virtual COM Ports and Virtual Fax Voip 14.4k TAPI Voice-Fax modems on your system. You can configure your Fax & Voice program to operate with both the Fax Voip COM ports or virtual modems. From the perspective of your VoIP network, it provides a fully featured SIP/H.323 client with support for faxing over VoIP trunks, both in G.711 and T.38 (and more importantly, with Error Correction Mode - ECM!). Fax Voip's software passed our rigorous testing requirements and made it to our Certified Device List. We've included a simple [configuration guide](https://helpdesk.t38fax.com/hc/en-us/articles/360053047491-Fax-Voip-T38-Fax-Voice) on our website to help you get up and running. Darren Nickerson · [Read more about Fax Voip T38 Fax & Voice Officially Certified](https://blog.t38fax.com/fax-voip-t38-fax-voice-officially-certified) Insider Jan 26, 2017 ## [Join Us at ITEXPO East 2017 in Fort Lauderdale](https://blog.t38fax.com/join-us-at-itexpo-east-2017) [![Join Us at ITEXPO East 2017 in Fort Lauderdale](https://blog.t38fax.com/hubfs/t38fax.jpg)](https://blog.t38fax.com/join-us-at-itexpo-east-2017) Join us at ITEXPO East in Fort Lauderdale, FL from Feburary 8-10, 2017, to meet our Sales and Engineering team and learn more about our ability to provide premium fax-optimized SIP trunks. T38Fax Incorporated will be a Gold Sponsor at this year’s ITEXPO, the industry-leading business technology event. We will also be a Platinum Sponsor of Digium Asterisk World, which will be held within ITEXPO. Darren Nickerson · [Read more about Join Us at ITEXPO East 2017 in Fort Lauderdale](https://blog.t38fax.com/join-us-at-itexpo-east-2017) Interoperability Jan 12, 2016 ## [Obihai OBi2xx Series Officially Certified](https://blog.t38fax.com/obihai-obi2xx-series-officially-certified) [![obi2xx](https://blog.t38fax.com/hubfs/obi2xx.png)](https://blog.t38fax.com/obihai-obi2xx-series-officially-certified) The OBi2xx Series Universal VoIP Adapters are targeted at Internet phone service providers world-wide. Their innovation and sophistication in the areas of speech technology, voice traffic prioritization, call management and ease of set-up are catalysts that ignite excitement among consumer and small business users who want the best product for their VoIP communication needs. In addition to its impressive list of voice features, the OBi2xx series also supports T.38, an essential feature to ensure reliable faxing over SIP trunks. Darren Nickerson · [Read more about Obihai OBi2xx Series Officially Certified](https://blog.t38fax.com/obihai-obi2xx-series-officially-certified) Interoperability Dec 15, 2015 ## [MultiTech FaxFinder IP Officially Certified](https://blog.t38fax.com/multitech-faxfinder-ip-officially-certified) [![MultiTech FaxFinder IP Officially Certified](https://blog.t38fax.com/hubfs/Multitech.png)](https://blog.t38fax.com/multitech-faxfinder-ip-officially-certified) We provide a robust, standards-based and feature-rich [T.38 Fax over IP (FoIP) solution](https://www.t38fax.com/products/) that ensures a uniform and consistently high level of successful fax completion over fax-optimized SIP trunks. In a nutshell, we’re serious about fax. Certification for interoperability with our [Power-T.38 service](https://www.t38fax.com/products/) is something we take just as seriously, demanding the same quality and reliability from our partners who wish to have their systems certified for interoperation with our service. We are pleased to announce that we have successfully completed interoperability testing with MultiTech’s [FaxFinder IP](https://www.multitech.com/brands/faxfinder-ip) fax servers. The [FaxFinder IP](https://www.multitech.com/brands/faxfinder-ip) fax servers were found to provide the stability and reliability that our customers have come to expect, while also providing a rich feature set. Josh Primiano · [Read more about MultiTech FaxFinder IP Officially Certified](https://blog.t38fax.com/multitech-faxfinder-ip-officially-certified) Insider Sep 29, 2015 ## [Be Our Guests at AstriCon 2015 in Orlando (Oct 13-15)](https://blog.t38fax.com/be-our-guests-at-astricon-2015-in-orlando-oct-13-15) [![Be Our Guests at AstriCon 2015 in Orlando (Oct 13-15)](https://blog.t38fax.com/hubfs/AstriCon_2015/2015-astricon-badges-exhibiting.jpg)](https://blog.t38fax.com/be-our-guests-at-astricon-2015-in-orlando-oct-13-15) [Asterisk](https://www.asterisk.org) is the world’s most widely adopted open source framework for building communications applications. It has been disrupting and redefining the telecommunications sector since its introduction in 1999. We’re very familiar with the power of open source telecommunications software via [our work with HylaFAX](https://www.ifax.com/about-us/about-us.html), and we saw so much potential in Asterisk (and the SIP and IAX-based open telephony movement in general) that we launched our [Telephony Depot](https://www.telephonydepot.com) business unit to cater to that market. It should come as no surprise, then, that our [Power-T.38 SIP trunks](https://www.t38fax.com/products/) were engineered with Asterisk in mind, and that Asterisk in its many forms appears prominently on our [list of approved/compatible](https://www.t38fax.com/support/knowledgebase-categories/compatibility-list/) T.38 Fax over IP (FoIP) implementations. Our [Asterisk Configuration Guide](https://www.t38fax.com/support/knowledgebase/asterisk/) contains a wealth of information and advice for configuring Asterisk to work with your Power-T.38 fax-optimized SIP trunks, and our support engineers should be able to iron out any problems you do encounter. Josh Primiano · [Read more about Be Our Guests at AstriCon 2015 in Orlando (Oct 13-15)](https://blog.t38fax.com/be-our-guests-at-astricon-2015-in-orlando-oct-13-15) Interoperability Sep 3, 2015 ## [Obihai OBi5vs Series Officially Certified](https://blog.t38fax.com/obihai-obi5vs-series-officially-certified) [![Obi5vs-Interop-1](https://blog.t38fax.com/hubfs/Obi5vs-Interop-1.png)](https://blog.t38fax.com/obihai-obi5vs-series-officially-certified)   At the core of our Power-T.38 service is a robust, reliable, standards-based and feature-rich T.38 Fax Over IP (FoIP) implementation that ensures a uniform and consistently high level of successful fax completion. We are fax industry veterans, and while other SIP providers might shrug and say “Oh well, it’s fax, what do you expect?”, we hold ourselves to exceptionally high standards when it comes to acceptable error rates. Naturally, we demand the same quality from partners who wish to have their technology certified for interoperation with our service. We are pleased to announce that we have successfully completed interoperability testing with Obihai’s OBi5vs Series Universal VoIP Adapters. The OBi504 and OBi508 were each subjected to rigorous torture testing in our labs, and performed flawlessly. We found them to provide the stability, service, and reliability that our customers have come to expect. Darren Nickerson · [Read more about Obihai OBi5vs Series Officially Certified](https://blog.t38fax.com/obihai-obi5vs-series-officially-certified) Interoperability Jan 22, 2015 ## [Certified - Dialogic SR140 Host-Based T.38 FoIP Software](https://blog.t38fax.com/blog/certified-dialogic-sr140-host-based-t.38-foip) [![Certified - Dialogic SR140 Host-Based T.38 FoIP Software](https://blog.t38fax.com/hs-fs/hub/447672/file-2378543446-jpg/Blog/DialogicOne-PartnProg-4C-Large.jpg)](https://blog.t38fax.com/blog/certified-dialogic-sr140-host-based-t.38-foip) We are pleased to announce that our [Power-T.38](https://www.t38fax.com/products/) fax-optimized SIP trunks have been certified compatible with Dialogic's [Brooktrout SR140 fax software](https://www.dialogic.com/sr140). SR140 is a host-based Fax over IP (FoIP) engine that brings the power of the industry-leading Dialogic Brooktrout fax hardware products (such as the TR114 & TR1034 fax boards) to software-based solutions. Dialogic SR140 is one of the most mature, most widely deployed T.38 implementations in the world. T38Fax.com has passed Dialogic's rigorous FoIP Interoperability testing process, and now appears on their  [list of recommended SIP Trunks](https://www.dialogic.com/interoperability/fax). They have also published a configuration guide that explains the exact configuration they used for testing, which can be downloaded below. Darren Nickerson · [Read more about Certified - Dialogic SR140 Host-Based T.38 FoIP Software](https://blog.t38fax.com/blog/certified-dialogic-sr140-host-based-t.38-foip) Insider Jan 16, 2015 ## [Visit us at ITEXPO in Miami Beach](https://blog.t38fax.com/visit-us-at-itexpo-in-miami-beach-2015) [![Visit us at ITEXPO in Miami Beach](https://blog.t38fax.com/hs-fs/file-2353677900-jpg/Blog/ITEXPO_2015_VIP_Pass.jpg)](https://blog.t38fax.com/visit-us-at-itexpo-in-miami-beach-2015) Planning a visit to [ITEXPO](https://itexpo.tmcnet.com/east/) in beautiful Miami Beach this month? Drop-in to Booth #534 to meet members of the T38Fax.com Sales & Engineering team and learn more about how our T.38 Fax Over IP service can eliminate all of those nagging fax performance problems you've been troubleshooting. Don't forget to ask about our special promotional offer!! Why not be our guest, VIP style!? We, in cooperation with our sister company and fellow booth attendee [Telephony Depot](https://www.telephonydepot.com), are pleased to offer you complimentary VIP access to the show. Quantities are limited, so claim yours now!  Darren Nickerson · [Read more about Visit us at ITEXPO in Miami Beach](https://blog.t38fax.com/visit-us-at-itexpo-in-miami-beach-2015) Interoperability Dec 17, 2014 ## [Certified - HylaFAX Enterprise Edition](https://blog.t38fax.com/certified-hylafax-enterprise-edition) [![Certified - HylaFAX Enterprise Edition](https://blog.t38fax.com/hubfs/hylafax-enterprise-t38fax-sip-config.png)](https://blog.t38fax.com/certified-hylafax-enterprise-edition) Follow the steps below to configure HylaFAX Enterprise with your T38Fax.com credentials: Darren Nickerson · [Read more about Certified - HylaFAX Enterprise Edition](https://blog.t38fax.com/certified-hylafax-enterprise-edition) Interoperability Dec 17, 2014 ## [Grandstream HandyTone, GXW, and UCM Certified for T.38](https://blog.t38fax.com/certified-grandstream-handytone) [![Grandstream HandyTone, GXW, and UCM Certified for T.38](https://blog.t38fax.com/hubfs/social-suggested-images/HT802V2_1-interop-2.png)](https://blog.t38fax.com/certified-grandstream-handytone) Grandstream's IP voice & video products offer the best price-to-performance point in the industry. We are pleased to announce that we have completed interoperability testing with Grandstream's engineering team, and will support Grandstream's entire product line under our highest (Certified) interoperation category. Supported devices include the HandyTone ATA (analog telephone adapter) models HT502, HT503, HT701, HT702 and HT704, enterprise analog IP gateway models GXW4004, GXW4008 and GXW4024, and the Grandstream UCM6100 series IP PBX Appliance. Darren Nickerson · [Read more about Grandstream HandyTone, GXW, and UCM Certified for T.38](https://blog.t38fax.com/certified-grandstream-handytone) This is a search field with an auto-suggest feature attached. - There are no suggestions because the search field is empty. Subscribe to Email Updates ### Subscribe Here! ### Top Posts ### Posts by Topic - [Interoperability (24)](https://blog.t38fax.com/topic/interoperability) - [Insider (13)](https://blog.t38fax.com/topic/insider) - [Tech Tips (8)](https://blog.t38fax.com/topic/tech-tips) [![T38Fax](https://www.t38fax.com/images/Logo_Large.svg)](https://www.t38fax.com/) The fax carrier built by fax people. Reliable T.38 fax over IP at scale. [1-888-536-4499](tel:+18885364499) Our Solution - [Power-T.38](https://www.t38fax.com/power-t38/) Who We Serve - [Enterprise Fax Servers](https://www.t38fax.com/solutions/enterprise-fax-servers/) - [Voice Service Providers](https://www.t38fax.com/solutions/voice-service-providers/) - [Business Fax Connectivity](https://www.t38fax.com/solutions/business-fax-connectivity/) Resources - [Knowledge Base](https://helpdesk.t38fax.com/hc/en-us/) - [Blog](https://blog.t38fax.com/) - [Security & Compliance](https://www.t38fax.com/security/) Company - [Why T38Fax](https://www.t38fax.com/why-t38fax/) - [About Us](https://www.t38fax.com/about-us/) - [Testimonials](https://www.t38fax.com/testimonials/) - [Partners](https://www.t38fax.com/partners/) - [Contact Us](https://www.t38fax.com/contact/) - [Careers](https://www.t38fax.com/careers/) Get Started - [Start Free Trial](https://my.t38fax.com/signup) - [Pricing](https://www.t38fax.com/pricing/) - [Customer Portal](https://my.t38fax.com/) - [Request a Quote](https://www.t38fax.com/contact/) © T38Fax Incorporated. All rights reserved. - [Terms of Service](https://www.t38fax.com/terms-of-service/) - [Privacy Policy](https://www.t38fax.com/privacy-policy/) - [Acceptable Use](https://www.t38fax.com/acceptable-use-policy/) ```json { "@context" : "https://schema.org", "@type" : "Blog", "description" : "Fax technology insights, interoperability certifications, and industry analysis from T38Fax.", "name" : "T38Fax Blog", "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://www.t38fax.com/images/t38fax-logo.png" }, "name" : "T38Fax", "url" : "https://www.t38fax.com" }, "url" : "https://blog.t38fax.com/" } ```