Category: Open Source

Open Source

Seeking Reviewers – Open Source Courseware for IPv6 Computer Networking

Computer Networking open source coursewareWould you be interested in reviewing a computer networking course book that is being updated for IPv6 and is available as an open source document for all to use? We learned a bit ago that professor Olivier Bonaventure at the Universite catholique de Louvain in Belgium is seeking reviewers for his draft 2nd edition of “Computer Networking : Principles, Protocols and Practice” that he has updated for IPv6. The book can be found at:

although what is perhaps more interesting is that Professor Bonaventure has made the book available on Github at:

It is available for anyone to use under a Creative Commons Attribution-Share Alike 3.0 Unported License.  He is seeking comments about the book and asking people to raise new issues on Github at:

where you can see that some reviewers have already filed a number of suggestions and bug reports.

We understand that the goal of Professor Bonaventure and his team is to develop a more finished version of this 2nd edition by the middle of this year and we commend them on this effort.  These kind of courseware books / modules that can be used at universities and other training centers are definitely welcome.  We look forward to adding this course book to our IPv6 Training page as it continues to evolve.

If you have a bit of time to read through the book, Professor Bonaventure and his team would no doubt appreciate any feedback you may have!


What Devices And Software Support The Opus Audio Codec? Here Is A List

Opus codec logoWhat devices support the Opus audio codec? What softphones? hardphones? call servers? Obviously given that Opus is the "mandatory to implement" audio codec for WebRTC, it will be in many web browsers... but what other I was asked this question by a colleague recently and when I couldn't easily find a list on the Opus codec web site, I turned to the VUC community inside of Google+ and posted there. The great folks there naturally were a huge help, and quickly came up with this list:

UPDATE: No sooner had I hit "Publish" then I discovered that Wikipedia has a list of devices and software supporting the Opus codec. As that list is much longer than this one below, I'd encourage you to look at that list.

What other devices or software supports the Opus codec? (Or what other lists are out there listing devices supporting the Opus codec?) Please do let me know either by comments here or on social media.


P.S. If you don't understand WHY the Opus codec matters so much, please read my earlier post on this topic.

If you found this post interesting or useful, please consider either:

Today’s VUC Call – Setting Up A Cellular Network In The Desert For Burning Man

TimpantonToday's VoIP Users Conference (VUC) call at 12:00 noon US Eastern should be quite an interesting one. Tim Panton from Voxeo Labs and Tropo will be joining the call to talk about his experience setting up a mobile network in the middle of the desert for this year's Burning Man event.

Tim recently described the experience in a guest post at TechCrunch: "What We Learned Running A Mobile Network At Burning Man" and on the VUC call will talk more about what he did. The FAQ from the Papa Legba camp at Burning Man makes for quite an interesting read. I'm looking forward to hearing more from Tim... and the call is open for anyone to join in.

You can join the live call via SIP, Skype or the regular old PSTN. There is also an IRC backchannel that gets heavy usage during the call. It will be recorded so you can always listen later.

If you found this post interesting or useful, please consider either:

Today’s VUC Call All About The "FreeSWITCH Cookbook" – Noon US Eastern

Today at noon US Eastern on the VoIP Users Conference (VUC) Call for Friday, April 27th, the group will discuss the brand new "FreeSWITCH Cookbook"[1] published by PACKT Publishing. The four authors of the book, who are also leaders of the FreeSWITCH project, will apparently be joining the call.

While Asterisk generally gets most of the "open source VoIP" buzz, the folks at the FreeSWITCH project have been working away on their own solution. As they will say, FreeSWITCH performs a different role than Asterisk and is used in different contexts.

FreeSWITCH has become quite a powerful platform and I'm looking forward to learning more about what is going on with the project right now.

You can join the live call via SIP, Skype or the regular old PSTN. There is also an IRC backchannel that gets heavy usage during the call. It will be recorded so you can always listen later.

As noted on the VUC page for today's call, the show will also be simulcast in video using Google+ video and YouTube. If you are interested in joining the video side of the call, please follow the instructions on the page.

[1] In full disclosure, this is an affiliate link with Amazon and if you actually purchase the book I receive a tiny amount of money. If you think this influences what I write here, you clearly haven't been reading my site. :-)

If you found this post interesting or useful, please consider either:

Video: How to Communicate at Burning Man using OpenBTS and Tropo

Heading to Burning Man this coming week? Would you like to use your mobile phone to connect up with others on the playa in Black Rock City?

If so, check out this video from Chris Pirillo about the work being done by a team of folks to supply local cell phone coverage... the vans with satellite and cell hookups are already enroute... it uses software from OpenBTS and to let burners leave each other voice messages, exchange SMS messages and more. Here's the video:

And here are some blog posts that provide more information:

I'm not personally going to be at Burning Man, but this does sound very cool!

If you found this post interesting or useful, please consider either:

The FCC … on Github??? and releasing a WordPress plugin???

FCC logoI love being surprised… did you know that the Federal Communications Commission (FCC) is making code available as open source over on Github? And that FCC staffers have released a WordPress plugin?

I discovered this via a tweet from someone that brought me to the “Official FCC Blog” and the July 6th post, “Contributing Code Back:’s Open-Source Feedback Loop,” that outlines many of the contributions they have been making.

As a long-time open source advocate, I’m thrilled to see the FCC doing this. It’s great to see them on Github – and it’s great to see them giving back to the WordPress ecosystem.

And I love that they end the post asking readers to fork their code and contribute changes back!

Great to see – and kudos to the FCC “new media” team for getting involved in this way.

And So The Groklaw Era Draws To A Close May 16, 2011…

GroklawAnd so must all good things come to an end… Pamela Jones announced over the weekend that she would be ending new posts to Groklaw on May 16, 2011, the eighth anniversary of the site.

For those of us who spent a good bit of time in the Linux world, Groklaw became a critical resource to stay up on the latest follies in the ongoing SCO lawsuit. “PJ”, as Pamela Jones preferred to be called, and the community of passionate helpers she soon attracted were there to rapidly research and debunk any claims that SCO put forward.

SCO has faded to pretty much irrelevance in 2011… but 8 years ago their lawsuit was extremely serious and a cause for great concern for anyone working with Linux. At the time of the initial lawsuit, I was a product manager at Mitel for a Linux-based product, so the whole issue was very definitely something I paid attention to… and Groklaw was definitely on my frequent reading list.

[NOTE: If you have never heard of Groklaw, I would start with the mission statement and the various links off that page.]

And now PJ writes:

In a simple sentence, the reason is this: the crisis SCO initiated over Linux is over, and Linux won. SCO as we knew it is no more.

There will be other battles, and there already are, because the same people that propped SCO up are still going to try to destroy Linux, but the battlefield has shifted, and I don’t feel Groklaw is needed in the new battlefield the way it was in the SCO v. Linux wars.

Remember that when I started Groklaw, I had no intention to create something as huge as Groklaw became. I really was just trying to learn how to blog. When all of you showed up, I saw what we could accomplish together, and we did. But to do it, I had to set aside a lot of things that are important to me too. I’d like to go back to being nobody, just living a normal life again.

I kept going all these years because when SCO attacked in the media and in the courtrooms, there was nobody to do what we did. Only the community could have answered SCO, technically, because you guys lived the history of UNIX and Linux and you knew what they were saying was not true. So we spoke up and explained over and over until everyone understood.

And she ends with:

I always told you that I didn’t do Groklaw for money or for fame or as a career move. I did it to be effective. That’s all I wanted. And I told you that when it was over, I’d go back to my normal pre-Groklaw life. And now you know by this decision that I told you the truth.

No matter what happens next, I know that we changed the course of history. How many people get to say that? I never expected it, frankly, and I am grinning just thinking about how much fun we’ve had doing it. Our work will be available for historians permanently, so the impact we had isn’t over today, and someday we’ll tell our grandkids that we were part of this, part of Groklaw. We are in the history books. Our work will continue as long as anyone cares about this unique time period in the history of computer software, a history that we are a part of forever. And that is a long, long time.

Thanks to you, PJ, for all the insane amount of work that you and your community did and continued to do. We all out in the larger community owe you all an incredible amount of gratitude and thanks… you helped shine the light into dark corners and helped provide a means to focus the energy and passion of the greater community. Without all that Groklaw did, the SCO follies might have gone much differently.

And kudos to you, PJ, for what I’m sure is an incredibly hard decision to put a period at the end of the sentence and end the era of Groklaw. It’s super easy to simply let a project continue… there is a certain inertia that is hard to fight… and so projects and organizations continue to go on and on, even when their reason for being is no longer there.

Thank you for all you and your community did – and best wishes for whatever comes next!

P.S. Her full blog post is very much worth a read… as well as the many comments.