Smartphones

Meet Linphone: Free Worldwide Calling to Anybody with SIP

Meet Linphone: Free Worldwide Calling to Anybody with SIP

Monday, April 29, 2019

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Earlier this year we demonstrated how to set up a publicly-accessible Asterisk® server to enable free worldwide calling using SIP URIs which are email-like addresses for VoIP and video calls. But not everyone has an Asterisk server so today’s tutorial extends free calling to everyone with a Windows or Linux PC, a Mac, or any smartphone or tablet. All you need is a desktop computer with wired or wireless Internet access or, on a smartphone or tablet, a cell data… Read More ›

Interconnecting a Mobile PBX to the Asterisk Mothership

Interconnecting a Mobile PBX to the Asterisk Mothership

Monday, April 22, 2019

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The Holy Grail for a mobile VoIP solution is a simple way to connect back to your primary Asterisk® PBX via Wi-Fi from anywhere in the world to make and receive calls as if you never left. Let’s tick off the potential problems. First, many home-based PBXs are sitting behind NAT-based routers. Second, almost all remote Wi-Fi connections are made through a NAT-based router. Third, chances are the remote hosting platform blocks outgoing email from downstream servers such as a… Read More ›

A New VPN for All Seasons: Introducing OpenVPN for Asterisk

A New VPN for All Seasons: Introducing OpenVPN for Asterisk

Monday, April 15, 2019

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This month marks our twentieth anniversary wrestling with virtual private networks. Here’s a quick walk down memory lane. Our adventure began with the Altiga 3000 series VPN concentrators which we introduced in the federal courts in 1999. It was a near perfect plug-and-play hardware solution for secure communications between remote sites using less than secure Windows PCs. Cisco quickly saw the potential, gobbled up the company, and promptly doubled the price of the rebranded concentrators. About 10 years ago, we… Read More ›

Cell Phone Tips for Spring Break and International Travel

Cell Phone Tips for Spring Break and International Travel

Monday, March 25, 2019

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With Spring Break upon us and Summer Vacations just around the corner, we wanted to briefly review some of your cellphone and data options for those that might be planning a trip outside the United States. If you’re only going as far as Mexico, Canada, or the U.S. Virgin Islands, then your existing cellular provider in the U.S. may have you covered at no additional cost. If your provider is not AT&T, then check with your carrier. And speaking of… Read More ›

A Golden Newbie: Incredible PBX 13-13.10 for Ubuntu 18.04.2

A Golden Newbie: Incredible PBX 13-13.10 for Ubuntu 18.04.2

Monday, March 18, 2019

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If you’re as big a fan of Ubuntu as we are, then you’ll be pleased to know that the month-old update to Ubuntu 18.04 LTS is rock-solid. It takes a brave soul to name anything Bionic Beaver, but Ubuntu pulls it off and makes you want to meet one face-to-face, just not in a bar after midnight. Well, St. Paddy would be proud. Today’s new Incredible PBX® 13-13.10 release brings you everything you could want in a PBX, and the… Read More ›

Adding SIP URI Dialing to Asterisk for Free Worldwide Calling

Adding SIP URI Dialing to Asterisk for Free Worldwide Calling

Monday, February 11, 2019

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Since giving up on Google Voice, we’ve been extolling the virtues of SIP URI dialing which gives you unlimited free calls to anyone else in the world that happens to have their own SIP URI address. SIP URIs look very much like email addresses except they’re used to share phone conversations instead of email messages. And, as we’ve mentioned previously, if everyone in the world had their own SIP URI, paying for phone calls would become a thing of the… Read More ›

SIP Happens! And Kamailio Makes It Easy, Part I

SIP Happens! And Kamailio Makes It Easy, Part I

Monday, January 14, 2019

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If ever there was a Swiss Army Knife for SIP, Kamailio (a.k.a. OpenSER) is the hands-down winner. The flexibility of this open source SIP server is legendary. Whether it’s secure communications, insulation from brute force attacks, load balancing, failover, WebRTC, or the return of shared line appearances on your office phone system, Kamailio can handle it while processing thousands of call setups per second on minimal hardware platforms. Our plan for today is to walk you through setting up a… Read More ›

A Sobering Look at Asterisk and the 2019 VoIP Landscape

A Sobering Look at Asterisk and the 2019 VoIP Landscape

Monday, December 17, 2018

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Every six months or so we like to gaze into our crystal ball for a quick look at the VoIP landscape. 2018 has been quite the transformative year with the acquisition of Digium® and Asterisk® by Sangoma®. Unfortunately, as we predicted, the Digium layoffs have already begun, and 2019 may only get worse. While we have no inside information, we wouldn’t be surprised to see Digium’s headquarters in Huntsville closed within six months in an effort to balance the books.… Read More ›