News from Industry

FreeSWITCH Week in Review (Master Branch) June 6th-12th

FreeSWITCH - Tue, 06/16/2015 - 03:39

Hello, again. This passed week in the FreeSWITCH master branch we had 51 commits! Some of the new commits this week include: the addition of a new reserve-agents param to mod_callcenter, allowing for custom exchange name and type for mod_amqp producers, a sample build system for a stand alone(out of tree) FreeSWITCH module, and added video support to eavesdrop.

Join us on Wednesdays at 12:00 CT for some more FreeSWITCH fun! And head over to to learn more about FreeSWITCH support.

New features that were added:

  • FS-7620 [ftmod_libpri] Correctly set calling number presentation and screening fields
  • FS-7138 [mod_callcenter] Added a new reserve-agents param
  • FS-7436  FS-7601 [mod_opus] FEC support
  • FS-7623 [mod_amqp] Allow for custom exchange name and type for producers and fixed param name ordering bug caused by exposing these params
  • FS-7638 Allow ipv4 mapped ipv6 address to pass ipv4 ACLs properly
  • FS-7643 [mod_opus] Added interpretation of maxplaybackrate and sprop-maxcapturerate
  • FS-7641 Added video support to eavesdrop

Improvements in build system, cross platform support, and packaging:

  • FS-7635 Removed msvc 2005, 2008, and 2010 non working build systems
  • FS-7373 Expose the custom repo and key path to the build-all command too
  • FS-7648 Foundation for QA testing config , adding leave/check videomail test cases, adding videomail voicemail profile, adding video record/ playback test cases, adding set video on hold, force pre-answer prefix, and adding an eavesdrop test case.
  • FS-7338 Removed mod_shout dep libs to system libs to continue cleaning up the libs for the 1.6 build process and added Debian packaging for several new modules, as well as handle system lib change for a handful of modules
  • FS-7653 Sample build system for a stand alone(out of tree) FreeSWITCH module
  • FS-7601 [mod_opus] [mod_silk]  Removed a bounds check that can never be true in opus fec code and modify jitterbuffer usage to match the api change

The following bugs were squashed:

  • FS-7612 Fixed invalid json format for callflow key
  • FS-7609 [mod_sangoma_codec] Now that libsngtc-dev and libsngtc are in the FS debian repo, enable mod_sangoma_codec
  • FS-7621 [mod_shout] Fixed a slow interrupt
  • FS-7432 Fixed missing a=setup parameter from answering SDP
  • FS-7622 [mod_amqp] Make sure to close the connections on destroy. Currently the connection is malloc’d from the module pool, so there is nothing to destroy.
  • FS-7586 [mod_vlc] A fix for failing to encode audio during the recording of video calls
  • FS-7573 Fixed 80bit tag support for zrtp
  • FS-7636 Fixed an issue with transfer_after_bridge and park_after_bridge pre-empting transfers
  • FS-7654 Fixed an issue with eavesdrop audio not working correctly with a mixture of mono and stereo

ORTC Lib – mini update #webrtc - Mon, 06/15/2015 - 23:48

It’s been about a year since we uploaded the ORTC Lib presentation on slideshare …

We have been rather busy since then…

Good things are coming! :)

Join Us For Our Next Kazoo Training - July 20-22

2600hz - Mon, 06/15/2015 - 23:05

Join us for three days of Kazoo training – July 20-22. We will deep dive into Kazoo APIs and learn how to set up a cluster, GUI, WhApps, FreeSWITCH, BigCouch and more. Learn how to install, configure, maintain and program Kazoo so that you can build your business. Go in to the bootcamp as a novice – and come out as a Kazoo ninja. Register Now! 

LinkedIn – Where are Thou with WebRTC?

bloggeek - Mon, 06/15/2015 - 12:00

I’d expect LinkedIn to add WebRTC already.

Last week, I received an email from LinkedIn. Apparently, they acquired a learning company called Lynda. It did beg the question, with so many WebRTC acquisitions – where is LinkedIn in all this?

The company deals with professionals, revolving around a digital CV. They enable people to connect in order to conduct business. So why do they want me to revert to things like phone calls or Skype in 2015?

They an internal messaging/email system. Not the best one. Probably requires an overhaul to be an effective tool. So where’s the rest of my interactions with people? Where’s the “click here to call” or “schedule a meeting”?

LiveNinja tried being an experts marketplace. An aggregator of people with skillz. You searching for a guitar teacher? A developer for advice? A yoga lesson? Search them on LiveNinja, interact, schedule a meeting. Hell, it even allows you to pay online (taking part of that revenue and giving the rest to the expert). It is now morphing into Katana, leaving its aggregator vision towards embeddable experiences.

Google Helpouts tried and closed shop. Something to do with it trying to be everything for everyone.

But you know what? LinkedIn can be that marketplace for many. Easily. It already is. It just needs to have that integration with real time communication. Be it for communicating between professionals or for conducting job interviews as part of its jobs board.

So where is it exactly? Am I the only one missing a blue “Call me” button in LinkedIn? Should I make do with their posts platform?

There are over 20 different expert marketplaces using WebRTC at the moment. None of them has the reach of LinkedIn. Would be nice if LinkedIn acquired one of them and be done with it.


Planning on introducing WebRTC to your existing service? Schedule your free strategy session with me now.

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2600Hz Announces early-bird pricing at KazooCon, the Communications Revolution

2600hz - Sat, 06/13/2015 - 00:35

We are proud to announce that we will be hosting KazooCon October 5th – 6th in San Francisco. This year’s event will bring together developers, managed service providers, carriers and telecom evangelists. Attendees will learn about the latest Kazoo news and announcements, take part in technical sessions and network with other Kazoo users throughout our two-day conference. Announcements will include 2600Hz’s new reseller platform, WebRTC, Cluster Manager and Infrastructure as a Service (IaaS). Oops, we’ve already said too much. Early-Bird tickets are for sale Now! 

KazooCon enables all members of the telecom community to engage in hands-on experiences around distributed communication networks. 2600hz has also announced a Call for Speakers, where interested candidates can apply to speak.

2600hz will also be hosting a Kazoo training following KazooCon, October 7-9. This three-day training will teach software engineers about Kazoo and the third-party components that power the platform. Attendees will deep dive into Kazoo APIs and learn how to set up a cluster, GUI, WhApps, FreeSWITCH, BigCouch and more. Register Here. If you cannot make it in October, we also have an earlier training, July 20-22. Register Here.

Those interested in sponsoring KazooCon will need to contact marketing(at)2600hz(dot)com.

To see some of KazooCon 2014, watch last year’s presentations or look at the photos.

WebRTC and Man in the Middle Attacks

webrtchacks - Fri, 06/12/2015 - 21:33

WebRTC is supposed to be secure. A lot more than previous VoIP standards. It isn’t because it uses any special new mechanism, but rather because it takes it seriously and mandates it for all sessions.

Alan Johnston decided to take WebRTC for a MitM spin – checking how easy is it to devise a man-in-the-middle attack on a naive implementation. This should be a reminder to all of us that while WebRTC may take care of security, we should secure our signaling path and the application as well.

{“editor”: “tsahi“}

Earlier this year, I was invited to teach a graduate class on WebRTC at IIT, the Illinois Institute of Technology in Chicago.  Many of you are probably familiar with IIT because of the excellent Real-Time Communications (RTC) Conference ( that has been hosted at IIT for the past ten years.

I’ve taught a class on SIP and RTC at Washington University in St. Louis for many years, but I was very excited to teach a class on WebRTC.  One of the key challenges in teaching is to come up with ways to make the important concepts come alive for your students.  Trying to make security more interesting for my students led me to write my first novel, Counting from Zero, a technothriller that introduces concepts in computer and Internet security (  For this new WebRTC class, I decided that when I lectured about security, I would – without any warning – launch a man-in-the-middle (MitM) attack ( on my students.

It turned out the be surprisingly easy to do, for two reasons.

  1. It is so quick and easy to prototype and test new ideas with WebRTC. JavaScript is such a fun language to program in, and node.js makes it really easy on the server side.
  1. Unfortunately, WebRTC media sessions have virtually no protection against MitM attacks. Not many people seem to be aware of the fact that although WebRTC uses DTLS to generate keys for the SRTP media session, the normal protections of TLS are not available.

So, a few weeks later, I had a WebRTC MitM attack ready to launch on my students that neither Chrome or Firefox could detect.

How did it work?  Very simple.  First, I compromised the signaling server.  I taught the class using the simple demo application from the WebRTC book ( that I wrote with Dan Burnett.  (You can try the app with a friend at  The demo app uses a simple HTTP polling signaling server that matches up two users that enter the same key and allows them to exchange SDP offers and answers.

I compromised the signaling server so that when I entered a key using my MitM JavaScript application, instead of the signaling server connecting the users who entered that key, those users would instead be connected to me.  When one of the users called the other, establishing a new WebRTC Peer Connection, I would actually receive the SDP offer, and I would answer it, and then create a new Peer Connection to the other user, sending them my SDP offer.  The net result was two Peer Connections instead of one, and both terminated on my MitM JavaScript application.  My application performs the SDP offer/answer negotiation and the DTLS Handshake with each of the users.  Each of the Peer Connections was considered fully authenticated by both browsers.  Unfortunately, the Peer Connections were fully authenticated to the MitM attacker, i.e. me.

Here’s how things look with no MitM attacker:


Here’s how things look with a MitM attacker who acts as a man-in-the-middle to both the signaling channel and DTLS:

How hard was it to write this code?  Really easy.  I just had to duplicate much of the code so that instead of one signaling channel, my MitM JavaScript had two.  Instead of one Peer Connection, there were two.  All I had to do was take the MediaStream I received incoming over one Peer Connection and attach it to the other Peer Connection as outgoing, and I was done.  Well, almost.  It turns out that Firefox doesn’t currently support this yet (but I’m sure it will one of these days) and Chrome has a bug in their audio stack so that the audio does not make it from one Peer Connection to another (see bug report  I tried every workaround I could think of, including cloning, but no success.  If anyone has a clever workaround for this bug, I’d love to hear about it.  But the video does work, and in the classroom, my students didn’t even notice that the MitM call had no audio.  They were too busy being astonished that after setting up their “secure WebRTC call” (we even used HTTPS which gave the green padlock – of course, this had no effect on the attack but showed even more clearly how clueless DTLS and the browsers were), I showed them my browser screen which had both of their video streams.

When I tweeted about this last month, I received lots of questions, some asking if I had disclosed this new vulnerability.  I answered that I had not, because it was not an exploit and was not anything new.  Everyone involved in designing WebRTC security was well aware of this situation.  This is WebRTC working as designed – believe it or not.

So how hard is it to compromise a signaling server?  Well, it was trivial for me since I did it to my own signaling server.  But remember that WebRTC does not mandate HTTPS (why is that, I wonder?).  So if HTTP or ordinary WebSocket is used, any attacker can MitM the signaling if they can get in the middle with a proxy.  If HTTPS or secure WebSocket is used, then the signaling server is the where the signaling would need to be compromised.  I can tell you from many years of working with VoIP and video signaling that signaling servers make very tempting targets for attackers.

So how did we get here?  Doesn’t TLS and DTLS have protection against MitM attacks?

Well, TLS as used in web browsing uses a certificate from the web server issued by a CA that can be verified and authenticated.  On the other hand, WebRTC uses self-signed certificates that can’t be verified or authenticated.  See below for examples of self-signed certificates used by DTLS in WebRTC from Chrome and Firefox.  I extracted these using Wireshark and displayed them on my Mac.  As you can see, there is nothing to verify.  As such, the DTLS-SRTP key agreement is vulnerable to an active MitM attack.

The original design of DTLS-SRTP relied on exchanging fingerprints (essentially a SHA-256 hash of the certificate, e.g. a=fingerprint:sha-256 C7:4A:8A:12:F8:68:9B:A8:2A:95:C9:5E:7A:2A:CE:64:3D:0A:95:8E:E9:93:AA:81:00:97:CE:33:C3:91:50:DB) in the SIP SDP offer/answer exchange, and then verifying that the certificates used in the DTLS Handshake matched the certificates in the SDP.  Of course, this assumes no MitM is present in the SIP signaling path.   The protection against a MitM in signaling recommended by DTLS-SRTP is to use RFC 4474 SIP Enhanced Identity for integrity protection of the SDP in the offer/answer exchange.  Unfortunately, there were major problems with RFC 4474 when it came to deployment, and the STIR Working Group in the IETF ( is currently trying to fix these problems.  For now, there is no SIP Enhanced Identity and no protection against a MitM when DTLS-SRTP is used with SIP.   Of course, WebRTC doesn’t mandate SIP or any signaling protocol, so even this approach is not available.

For WebRTC, a new identity mechanism, known as Identity Provider, is currently proposed (  I will hold off on an analysis of this protocol for now, as it is still under development in an Internet-Draft, and is also not available yet.  Firefox Nightly has some implementation, but I’m not aware of any Identity Service Providers, either real or test, that can be used to try it out yet.  I do have serious concerns about this approach, but that is a topic for another day.

So are we out of luck with MitM protection for WebRTC for now?  Fortunately, we aren’t.

There is a security protocol for real-time communications which was designed with protection against MitM – it is ZRTP ( invented by Phil Zimmermann, the inventor of PGP.   ZRTP was designed to not rely on and not trust the signaling channel, and uses a variety of techniques to protect against MitM attacks.

Two years ago, I described how ZRTP, implemented in JavaScript and run over a WebRTC data channel, could be used to provide WebRTC the MitM protection it currently lacks (  During TADHack 2015(, if my team sacrifices enough sleep and drinks enough coffee, we hope to have running code to show how ZRTP can detect exactly this MitM attack.

But that also is a subject for another post…

{“author”: “Alan Johnston“}

Want to keep up on our latest posts? Please click here to subscribe to our mailing list if you have not already. We only email post updates. You can also follow us on twitter at @webrtcHacks for blog updates and news of technical WebRTC topics or our individual feeds @chadwallacehart@reidstidolph, @victorpascual and @tsahil.

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Join me for a Free TokBox Webinar to Learn More About WebRTC Multiparty

bloggeek - Fri, 06/12/2015 - 15:52

See you on June 24!

Just a quick note before we head into the weekend.

I’ve partnered with TokBox for a webinar on the various use cases where multiparty video calling is desired.

The webinar will address an area I love, which is the various topologies and architectures to choose from when dealing with multiparty video. Badri Rajasekar, CTO of TokBox, will be there with me and we’re planning to have an interesting conversation.

If this topic is close to your heart, or just something you wish to learn more about – register online – it’s free.

See you online on 24 June at 10:00am PDT. And if you can’t make it – just register to watch it offline.

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Book Review: WebRTC Cookbook

bloggeek - Thu, 06/11/2015 - 12:00

If you are looking for some quick WebRTC recipes, then this is the book for you.

Consider this another post in a series of posts about WebRTC related books. To see previous  reviews, check out the search tag book review.

The WebRTC Cookbook is the second book by Andrii Sergiienko. His first book was WebRTC Blueprints, was a hard core book – the first one with guts to take WebRTC books to the extreme topics at that time.

WebRTC Cookbook takes a more orderly approach, where Andrii picks several topics and explains them briefly, in a step by step manual. He also provides good follow up material for those who wish to learn more.

Things you will find in this book:

  • Peer connection related topic, with the interesting bits in the STUN and TURN configuration
  • Security issues – HTTPS, TURN server security, firewalls, etc.
  • VoIP – integrating with Asterisk and FreeSWITCH
  • Debugging – stats, webrtc-internals, Wireshark, …
  • Video filters (unfortunately no audio ones)
  • Native apps – iOS, Android and
  • Integrating with some of the WebRTC frameworks and services out there
  • “advanced” stuff – things you’d want to do to add polish to your service

This is a good book for your WebRTC library. It acts as a nice reference to go to when you need to quickly skim a topic.


Kranky and I are planning the next Kranky Geek in San Francisco sometime during the fall. Interested in speaking? Just ping me through my contact page.

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Kamailio v4.3.0 Released

miconda - Wed, 06/10/2015 - 23:00
June 10, 2015Kamailio v4.3.0 is out –  a new major release, collecting new features and improvements added during about six months of development and one and a half month of testing.In short, this major release brings 9 new modules and enhancements to more than 50 existing modules, plus components of the core and internal libraries. Detailed release notes are available at:Development for next major release, 4.4.0 (expected to be out in the first part of 2016) has started already, even a new module is already present in master branch: smsops. Watch the project’s web site closely for further updates and news about evolution of Kamailio.Enjoy SIP routing in a secure, flexible and easier way with Kamailio v4.3.0!Thank you for flying Kamailio!

Facetime doesn’t face WebRTC

webrtchacks - Tue, 06/09/2015 - 16:03

This is the next decode and analysis in Philipp Hancke’s Blackbox Exploration series conducted by &yet in collaboration with Google. Please see our previous posts covering WhatsApp and Facebook Messenger for more details on these services and this series. {“editor”: “chad“}


FaceTime is Apple’s answer to video chat, coming preinstalled on all modern iPhones and iPads. It allows audio and video calls over WiFi and, since 2011, 3G too. Since Apple does not talk much about WebRTC (or anything else), maybe we can find out if they are using WebRTC behind the scenes?

As part of the series of deconstructions, the full analysis (another sixteen pages) is available for download here, including the Wireshark dumps.
If you prefer watching videos, check out the recording of this talk I did at Twilio’s Signal conference where I touch on this analysis and the others in this series.

In a nutshell, FaceTime

  • is quite impressive in terms of quality,
  • requires an open port (16402) in your firewall as documented here,
  • supports iOS and MacOS devices only,
  • supports simultaneous ring on multiple devices,
  • is separate from the messaging application, unlike WhatsApp and Facebook Messenger,
  • announces itself by sending metrics over an unencrypted HTTP connection (Dear Apple, have you heard about pervasive monitoring?)
  • presumably still uses SDES (no signs of DTLS handshakes, but I have not seen a=crypto lines in the SDP either).

Since privacy is important, it is sad to see a complete lack of encryption in the HTTP metrics call like this one:

Example of an unencrypted keep alive packet that could be intercepted by a 3rd party to track a user


FaceTime has been analyzed earlier- first when it was introduced back in 2010 and more recently in 2013. While the general architecture is still the same, FaceTime has evolved over the years like adding new codecs like H.265 when calling over cellular data.

What else has changed? And how much of the changes can we observe? Is there anything those changes tell us about potential compatibility with WebRTC?

Still using SDES

It is sad that Apple continuing to use SDES almost two years after the IETF at it’s Berlin meeting where it was decided that WebRTC MUST NOT Support SDES. The consensus on this topic during the meeting was unanimous. For more background information, see either Victor’s article on why SDES should not be used or dive into Eric Rescorla’s presentation from that meeting comparing the security properties of both systems.

NAT traversal

Like WebRTC, FaceTime is using the ICE protocol to work around NATs and provide a seamless user experience. However, Apple is still asking users to open a certain number of ports to make things works. Yes, in 2015.

Their interpretation of ICE is slightly different from the standard. In a way similar to WhatsApp, it has a strong preference for using a TURN servers to provide a faster call setup. Most likely, SDES is used for encryption.


For video, both the H.264 and the H.265 codecs are supported, but only H.264 was observed when making a call on a WiFi. The reason for that is probably that, while saving bandwidth, H.265 is more computationally expensive. One of the nice features is that the optimal image size to display on the remote device is negotiated by both clients.


For audio, the AAC-ELD codec from Fraunhofer is used as outlined on the Fraunhofer website.
In nonscientific testing, the codec did show behaviour of playing out static noise during wifi periods of packet loss between two updated iPhone 6 devices.


The signaling is pretty interesting, using XMPP to establish a peer-to-peer connection and then using SIP to negotiate the video call over that peer-to-peer connection (without encrypting the SIP negotiation).

This is a rather complicated and awkward construct that I have seen in the past when people tried to avoid making changes to their existing SIP stack. Does that mean Apple will take a long time to make the library used by FaceTime generally usable for the variety of use cases arising in the context of WebRTC? That is hard to predict, but this seems overly complex.

Quality of Experience

FaceTime offers an impressive quality and user experience. Hardware and software are perfectly attuned to achieve this. As well as the networking stack as you can see in the full story.


{“author”: “Philipp Hancke“}

Want to keep up on our latest posts? Please click here to subscribe to our mailing list if you have not already. We only email post updates. You can also follow us on twitter at @webrtcHacks for blog updates and news of technical WebRTC topics or our individual feeds @chadwallacehart@reidstidolph, @victorpascual and @tsahil.

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WebRTC Infographic: Are we at a Tipping Point?

bloggeek - Tue, 06/09/2015 - 12:00

Most probably yes.

In the last couple of weeks I’ve been working with people from the AT&T Developer Program on an Infographic. The idea behind it was to show the progress that WebRTC made in the past couple of years, trying to understand if it is time for people to join in. If you have been following me, you know that my answer is “start yesterday” when it comes to WebRTC.

The result is the WebRTC Infographic below:

For more information and some more verbosity around it, check out AT&T’s blog post on this WebRTC Infographic.

Kranky and I are planning the next Kranky Geek in San Francisco sometime during the fall. Interested in speaking? Just ping me through my contact page.

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FreeSWITCH Week in Review (Master Branch) May 30th-June 5th

FreeSWITCH - Tue, 06/09/2015 - 03:26

Hello, again. This passed week in the FreeSWITCH master branch we had 74 commits! Quite a bit of work went in this week and some of the many new features are: added Perfect Forward Secrecy (DHE PFS) to mod_sofia, added new options to nibble bill for minimum charges and rounding, added ipv6 support to Verto / Websockets and keep sofia-sip ws lib in sync, and added new algorithms for offering calls to clients.

Join us on Wednesdays at 12:00 CT for some more FreeSWITCH fun! And head over to to learn more about FreeSWITCH support.

New features that were added:

  • FS-7337 [mod_sofia] Add support for Remote-Party-ID header in UPDATE request.
  • FS-7561 [mod_sofia] Add Perfect Forward Secrecy (DHE PFS)
  • FS-7560 [mod_nibblebill] Added new options to nibble bill for minimum charges and rounding
  • FS-7587 FS-7602 FS-7499 [mod_verto] Add ipv6 support to Verto / Websockets and additional support ice/dtls ipv6 functionality
  • FS-6801 [mod_sofia] Add sip_watched_headers variable to launch events when a SIP message contains a given SIP header
  • FS-7564 [mod_rayo] Added new algorithms for offering calls to clients
  • FS-7436 FS-7601 [mod_opus] Added FEC support
  • FS-7603 [mod_event_socket] Failover for socket application in dialplan
  • FS-7585 [mod_rtmp] Increased AMF buffer for larger video and add bandwidth settings to flash video
  • FS-7311 [mod_sofia] Updating display name is disabled when caller_id equal “_undef_”
  • FS-7513 [mod_conference] Add video-auto-floor-msec param to control how long a member must have the audio floor before also taking the video floor and make sure user does not have auto avatar when not visible

Improvements in build system, cross platform support, and packaging:

  • FS-7610 Fixed a gcc5 compilation issue
  • FS-7499 Fixed a build error on 32bit platforms
  • FS-7570 Fixed a compilation issue w/ zrtp enabled
  • FS-7426 Only disable mod_amqp on Debian Squeeze and Wheezy

The following bugs were squashed:

  • FS-7579 [mod_conference] Fixed a bug not allowing suppression of play-file-done
  • FS-7462 [mod_opus] Fix FMTP in the INVITE to use values from opus.conf.xml
  • FS-7593 [mod_skinny] Fixed a bug where skinny phones would stomp on each other in database when thundering herd occurs
  • FS-7597 [mod_codec2] Fixed encoded_data_len for MODE 2400, it should be 6 bytes. Also replaced 2550 bps bitrate (obsoleted operation mode) by 2400
  • FS-7604 [fs_cli] Fixed fs_cli tab completion concurrency issues on newer libedit
  • FS-7258 FS-7571 [mod_xml_cdr] Properly encode xml cdr for post to web server
  • FS-7584 More work on rtcp-mux interop issue with chrome canary causing video transport failure
  • FS-7586 [mod_conference] Change the default min-required-recording-participants option for mod_conference from 2 to 1 and silence the warning when the value is set to 1 in the configs
  • FS-7607 Update URLs to reflect https protocol on websites and update additional URLs to avoid 301 redirects.
  • FS-7479 Fixed a crash caused by large RTP/PCMA packets and resampling
  • FS-7524 [mod_callcenter] Fixing tiers, level and position should default to 1 instead of 0
  • FS-7613 Fixed a crash in core text rendering

Vancouver WebRTC – Meetup 2 @PlentyofFish - Mon, 06/08/2015 - 23:02

With more than 40 members and growing, Vancouver WebRTC now has a new venue! Chris Simpson from PoF rallied to get us into their new presentation lounge, the “Aquarium”, thanks Chris!


Our next event is on June 25th from 6-8pm and we have a great evening planned with Omnistream and Perch presenting!

Come check it out!

Quick IP prefix calculation

TXLAB - Mon, 06/08/2015 - 12:24

It’s a quite common task that you need to translate an IP address into a prefix — for example, when creating an IP prefix list from a set of addresses. Here’s a simple Perl script that helps it:

sudo apt-get install libnetaddr-ip-perl cat > <<'EOT' use strict; use warnings; use NetAddr::IP; if( scalar(@ARGV) == 0 ) {     die("Usage: $0 PREFIX ..."); } foreach my $pref (@ARGV) {     my $ip = NetAddr::IP->new($pref) or         die("Cannot create NetAddr::IP from $pref");     print $ip->network()->cidr(), "\n"; } EOT # testing cat >/tmp/x <<'EOT' EOT cat /tmp/x | xargs perl | awk '{print "set ", $1}' set set
Filed under: Networking Tagged: network management, networking, perl

WebRTC Related Acquisitions in Acceleration Mode

bloggeek - Mon, 06/08/2015 - 12:00

Another week, another WebRTC related acquisition took place.

Since the Tropo acquisition just a month ago, we had two more acquisitions:

  1. Fuze acquired LiveMinutes – that at the same time it raised $20M more. Fuze itself made use of WebRTC as an access point to its video conferencing service, and LiveMinutes focused on collaboration and used WebRTC for video chat
  2. Broadsoft acquired mPortal – an outsourcing vendor focusing on mobile communication apps, catering large enterprises and telcos

When Atlassian acquired Jitsi I was a bit worried. We were nearing the end of April with only 3 acquisitions in 2015. With 8 acquisitions in 2014, this looked like another “boring” year. Well… we’re now into the 7th acquisition of 2015 when it comes to WebRTC and we’re almost 6 months in.

The chart below shows the WebRTC related acquisitions we’ve had since WebRTC’s inception. We are growing steadily.

Most of the acquisitions this year are similar to the ones last year – they are about acquiring the market, the business models and the technology.  Only two of them have been technology/acquihires (ScreenHero and Jitsi).

How will the second half if this year shape out to be? Which kind of vendors are we going to see acquired next?

This is shaping up to be a pretty interesting year for WebRTC.

Customers of my WebRTC Dataset Subscription Plan will have access to detailed acquisition information from later this month.

Planning on introducing WebRTC to your existing service? Schedule your free strategy session with me now.


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Smartphone dipendente? Le Unified Communications sono un’ottima scusa!

Libera il VoIP - Fri, 06/05/2015 - 20:41

Ormai lo smartphone è entrato prepotentemente nella quotidianità di oltre 1,31 miliardi di persone in tutto il mondo, ma non solo, in una recente ricerca, eMarketer prevede una crescita del numero di utenti di fino a 2 miliardi entro il 2016, che corrisponde a circa il 25% della popolazione mondiale, per poi giungere fino a 2,58 miliardi di utenti entro il 2018.

Qual è la causa della „dipendenza“?

Il motivo per cui gli smartphone godono di tanta popolarità è ovvio. La dimensione e la connettività rendono dati e informazioni accessibili come mai prima. La possibilità di utilizzare il nostro smartphone ogni giorno come e per cosa vogliamo era impensabile fino a qualche anno fa. Inoltre, al giorno d‘oggi i costi di utilizzo non rappresentano più un ostacolo. Questi fattori spiegano la cosiddetta “dipendenza“ da smartphone e uno studio del Business Insider ha rilevato che il cittadino americano medio si perde almeno ogni due ore tra i meandri del proprio “aggeggio delle meraviglie”.

Smartphone multitalento

Lo smartphone serve anche da soluzione per le attuali piattaforme di comunicazione. Accanto alla telefonia l’utente accede a email, SMS e Internet. La rubrica è collegata alle reti dei Social Network e i dati dei contatti possono essere sincronizzati “on the go” tramite applicazioni come LinkedIn.

Unified Communication in formato tascabile

Gli operatori telefonici sono a conoscenza delle abitudini del loro target group e offrono soluzioni per le  Unified Communications (UC) che permettono alle aziende di svolgere le loro attività professionali anche attraverso lo smartphone, unendo interessi aziendali e privati. Un sistema UC ben ponderato assicura alle aziende numerosi vantaggi: la riduzione dei costi, la reperibilità pressoché totale durante l’orario lavorativo e la riduzione degli spostamenti.

Il 3CX Phone Client per iPhone e Android, è un client VoIP sviluppato ad hoc per operare senza soluzione di continuità con il 3CX Phone System – indipendentemente dal luogo in cui si trova l’utente. La configurazione da remoto lo rende semplicissimo da installare e da gestire, anche perché si integra perfettamente con tutti i firewall tramite il tunnel incorporato. Il client, oltre a non necessitare di costi di licenza, supporta pienamente i servizi PUSH, fondamentali per il risparmio della batteria. La App permette agli utenti di iPhone e iPad come di smartphone e tablet Android, di verificare la presenza dei colleghi, di impostare il proprio stato di presenza e di effettuare e ricevere chiamate gratuitamente all’interno della rete aziendale. Il concetto di “un solo numero” permette inoltre di rispondere alle chiamate col numero interno dell’ufficio e di trasferirle ai colleghi senza bisogno che l’interlocutore componga un nuovo numero. Le teleconferenze e la segreteria telefonica, infine, sono accessibili tramite rete WiFi e 3G.


3CX fa il pieno agli ICT Solutions days di ALLNET Italia

Libera il VoIP - Fri, 06/05/2015 - 20:37

Sì è conclusa oggi la due giorni organizzata dal nostro distributore ALLNET Italia: l’evento ICT Solutions Days.

Una serie di incontri, presentazioni e sessioni di lavoro che hanno riguardato le diverse aree di attività di ALLNET, ma quest’anno si è dato particolare risalto alla Unified Communication & Collaboration, oggetto della sessione plenaria che, nella mattinata del 12 Maggio, ha visto l’apertura dell’evento.

3CX c’era e ha potuto presentare le proprie soluzioni, 3CX Phone System e 3CX WebMeeting, ad una vasta platea di professionisti IT, partner e rivenditori.

L’evento si è svolto nella splendida cornice del Savoia Hotel Regency di Bologna ed è stata perfettamente organizzato dal professionalissimo staff di ALLNET. Due splendide giornate hanno poi contribuito al completo successo dell’iniziativa.

A conferma della solida partnership che lega da anni 3Cx e ALLNET Italia, nel corso degli ICT Solution Days abbiamo incontrato tantissime persone: partner “storici”, nuove aziende e professionisti. In sintesi: un’ottima occasione per presentare le nostre soluzioni e per raccogliere feedback da chi è tutti i giorni sul mercato delle telecomunicazioni e della Unified Communication


Kamcli – command line control tool

miconda - Thu, 06/04/2015 - 13:35
Recently a new command line tool for Kamailio management was published by Asipto, named kamcli, available at:It is written in Python and at this stage it is more an attempt to see if the community finds it useful and worth to get it developed further as part of Kamailio project.
  • Short about the benefits/flexibility:
  • python is by default installed on OSes (including Mac OS X) (as opposite to Lua, for example)
  • became rather fast since Google invested in it
  • lot more knowledge base and developers out there (as opposite to Lua or Perl), along with tons of extensions
  • implementation is based on a CLI framework (Click) that makes it extremely easy to add new commands in a plugin-like fashion, therefore is easy to have custom commands when having specific needs (e.g., managing a custom database table used in kamailio.cfg via sqlops => add a new in commands subfolder, without touching other files, not even the config)
  • help message is embedded in the command code file, making it easier to document commands
  • easy to validate parameters as well as format the output
  • handling kamcli configuration file options is also easy (ini format)
One of the reasons of pushing this out was in the perspective of deprecating MI and working with JSONRPC fifo from command line — there is not an easy ways to manage json docs with shell and common tools (e.g., cat, echo, grep, awk) only. Kamcli has implemented the JSONRPC over fifo command (see also jsonrpc-s kamailio module). Still, given the old initial implementation, at this moment, kamcli is relying on MI via fifo (mi_fifo) for some of the commands (e.g., dumping usrloc records from memory).So far, couple of commands were implemented when comparing with kamctl:
  • subscriber management (kamctl add/rm/passwd…)
  • user location management (kamctl ul …)
  • database querying (kamctl db …)
  • statistics (kamctl stats …)
  • mi commands (kamctl mi …)
  • jsonrpc commands (not in kamctl)
If there is enough interest in developing this tool further, it can be migrated to Kamailio organization on Github to have all developers able to work on it.For further discussions about this tool, email to development mailing list .

W3C ORCT CG Meeting 9 – June 24, 10am PDT - Wed, 06/03/2015 - 00:03

We are holding our ninth CG meeting on the 24th of June…

Where: Online (TBD)

When: June 24, 2015 10am PDT


Review action items from last meeting:

– RTCIceCandidateComplete dictionary

– RTCIceGatherer.close affect on RTCIceTransport / RTCDtlsTransport

– Comments added to #200
Incoming media prior to Remote Fingerprint Verification

– Comments added to #170, Peter to send fuller proposal to list
Response to connectivity checks prior to calling iceTransport.start()?

– Original #188 – Priority Calculation, new bug #209
Trying to remove RTCIceTransport.createAssociatedTransport(component)

– Philipp Hancke’s Review Comments

Review open issues:

Review current draft: (upper right hand side)

Review implementation progress: ORTC Lib, MS Edge, Google ?

Review ORTC CG alignment with WebRTC WG and 1.0 spec.

Questions, comments?

Plan next meeting.

Releasing Kamailio v4.3.0

miconda - Tue, 06/02/2015 - 13:49
Next major version of Kamailio (v4.3.0) is planned to be out on Wednesday (June 10) or Thursday (June 11). The pool of things to fix is minor, deb packaging for 4.3 is ready, thanks to Victor Seva. Some bits are still left to do: add docs for 4.3 series in wiki, prepare RPM packaging and build
proper ‘what is new’ list of features.Testing didn’t reveal new issues in the recent past as we run in two servers with live traffic. If you have issues with 4.3 branch, be sure you report them on Github tracker:Meanwhile, contributions to enhance the related pages on the wiki are very appreciated:Stay tuned for updates!


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