Want to save bandwidth in you Asterisk-based VoIP solution? Silence suppression is coming to Asterisk and you can help test it. This presentation tells you more about the Roibos project.
Chris Swan's presentation for Thingmonk 2014 - security protocols in constra...Cohesive Networks
Security protocols in constrained environments
CTO Chris Swan presented on 2 December 2014 at the Redmonk event Thingmonk, focused on IoT and security.
SIP (Session Initiation Protocol) is a signaling protocol used to create, manage and terminate sessions in an IP based network. This course is for beginners and aims to give a brief introduction to SIP before one ventures into the long RFC documents.
Horizontal Leadership Managing Change And ComplexityGunnar Westling
Often, complex challenges tend to fall between stools. Thus, to successfully cope with such challenges, you have to lead horizontally across internal and external boundaries.
Source code control is the most important practice that a software professional can do. This presentation introduces Git, the modern, distributed, version control designed for speed and efficiency.
This was delivered for a local Drupal user group.
I originally gave this presentation at the Drupal Self-Help Group meetup, in May 2012.
"Media Temporalities: Genre, Queer Space, and Digital Archives in Transition"
Media in Transition 6 - MIT
April 25, 2009
A part of the above panel. I moderated; this is not my own presentation!
Transmedia Noir: Genre Continuity and Transformation Across Media
Louisa Stein
Louisa Stein is Assistant Professor of Film, Television, and New Media at San Diego State University. She has published essays on genre and on audience use of digital media. She is coeditor of the collection Teen Television: Essays on Programming and Fandom. Her current book project is entitled Millennial Noir.
Chris Swan's presentation for Thingmonk 2014 - security protocols in constra...Cohesive Networks
Security protocols in constrained environments
CTO Chris Swan presented on 2 December 2014 at the Redmonk event Thingmonk, focused on IoT and security.
SIP (Session Initiation Protocol) is a signaling protocol used to create, manage and terminate sessions in an IP based network. This course is for beginners and aims to give a brief introduction to SIP before one ventures into the long RFC documents.
Horizontal Leadership Managing Change And ComplexityGunnar Westling
Often, complex challenges tend to fall between stools. Thus, to successfully cope with such challenges, you have to lead horizontally across internal and external boundaries.
Source code control is the most important practice that a software professional can do. This presentation introduces Git, the modern, distributed, version control designed for speed and efficiency.
This was delivered for a local Drupal user group.
I originally gave this presentation at the Drupal Self-Help Group meetup, in May 2012.
"Media Temporalities: Genre, Queer Space, and Digital Archives in Transition"
Media in Transition 6 - MIT
April 25, 2009
A part of the above panel. I moderated; this is not my own presentation!
Transmedia Noir: Genre Continuity and Transformation Across Media
Louisa Stein
Louisa Stein is Assistant Professor of Film, Television, and New Media at San Diego State University. She has published essays on genre and on audience use of digital media. She is coeditor of the collection Teen Television: Essays on Programming and Fandom. Her current book project is entitled Millennial Noir.
Small Business are inherently good at networking, keeping in touch with customers and providing great customer service. As technology changes and the behavior of their customers change small businesses adopt to new technology.The Small Business Success Index found that Small business adoption of Social Media grew 24% over the past one year.
This presentation will describe the tools that small business can use and have a plan to follow that they can apply back in their business.
Small Business are inherently good at networking, keeping in touch with customers and providing great customer service. As technology changes and the behavior of their customers change small businesses adopt to new technology.The Small Business Success Index found that Small business adoption of Social Media grew 24% over the past one year.
This presentation will describe the tools that small business can use and have a plan to follow that they can apply back in their business.
Challenges and experiences with IPTV from a network point of viewbrouer
OpenSource IPTV MPEG2-TS analyzer.
This presentation was given at OpenSourceDays 2010 (and in earlier stages of the project at Bifrost Workshop 2009 and 2010)
Time Sensitive Networking in the Linux Kernelhenrikau
Time Sensitive Networking provides mechanisms for sending data accross the network with very low latency, low jitter and low framedrops, opening up a whole range of new applications.
This talk primarily focuses on media, but the driver should be interesting for industrial applications and automotive as well.
Inspired by my work on understanding the effects of the EU cyber resilience act, I made this presentation on vulnerability handling - SBOM, Vex, CVE, CVSS, CWE and more.
Introduction to the proposed EU cyber resilience act (CRA)Olle E Johansson
A short introduction to the proposed EU Cyber Resilience Act. It's a large document to parse, so please don't take my words as a truth, just indications of what will come. The CRA will impact everyone that distributes software and connected devices on the EU market, so it's important to stay up to date with this regulation.
Januscon 2019: Slides from my short talk about the need for a federation solution to connect all isolated WebRTC and SIP islands out there. Sorry for the lack of text, hopefully it will be available in a streamed version soon.
Photos (C) Olle E. Johansson
A talk about me discovering new architectures, new ways of building scalable realtime platforms #SIP #WebRTC #Kamailio #MQTT #NODERED
Watch it live at https://www.youtube.com/watch?v=BbfUXUWtxIg
A presentation for Kamailio World 2017 in Berlin: How Open Standards and Open Source affect national public radio broadcast. My personal view and opinions. Also, some information about Project IrisBroadcast.
Introduction to WebRTC used in the Stockholm WebRTC Meetup February 16th 2017. Talks about the underlying architecture - RTP, Turn, STUN, Ice and the world of changing IP networks
Realtime communication over a dual stack networkOlle E Johansson
Fosdem 2017: A short talk about dual stack (IPv4 and IPv6) issues when using SIP, WebRTC, XMPP and other realtime platforms in a dual stack world - where both client and server is connecting to the new and the old Internet.
Side note: Uploads to slide share doesn't work on IPv6-only networks.
My talk at Voip2day 2016 in Madrid (organised by Avanzada 7 in Malaga).
This talks cover recent trends in realtime communication, from VoIP to WebRTC and Internet of Things
A presentation covering work that needs to happen. We jokingly came up with a non-existing organisation that maintains a reference profile for SIP. While the organisation is just a joke, the work is quite serious.
A presentation about new functionality in SIP that is really needed for Hosted PBX services, SIP on mobile phones and more situations. #SIP #Kamailio #Asterisk #TLS #MoreCrypto
A video with this presentation is available on YouTube at
https://www.youtube.com/watch?v=uqFNlqB_Ssw
2015 update: SIP and IPv6 issues - staying Happy in SIPOlle E Johansson
What's the state of SIP and IPv6?
- An update I gave at the Netnod spring Meeting 2015.
Nothing much is happening, despite the fact that we have proven real issues with dual stacks in SIP.
A quick introduction to Kamailio - the leading Open Source SIP server (based on OpenSER and SER). Kamailio is quite different than Asterisk, FreeSwitch and many other VoIP platforms - why is that and how do you start getting your head around Kamailio?
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
Elevating Tactical DDD Patterns Through Object CalisthenicsDorra BARTAGUIZ
After immersing yourself in the blue book and its red counterpart, attending DDD-focused conferences, and applying tactical patterns, you're left with a crucial question: How do I ensure my design is effective? Tactical patterns within Domain-Driven Design (DDD) serve as guiding principles for creating clear and manageable domain models. However, achieving success with these patterns requires additional guidance. Interestingly, we've observed that a set of constraints initially designed for training purposes remarkably aligns with effective pattern implementation, offering a more ‘mechanical’ approach. Let's explore together how Object Calisthenics can elevate the design of your tactical DDD patterns, offering concrete help for those venturing into DDD for the first time!
Welocme to ViralQR, your best QR code generator.ViralQR
Welcome to ViralQR, your best QR code generator available on the market!
At ViralQR, we design static and dynamic QR codes. Our mission is to make business operations easier and customer engagement more powerful through the use of QR technology. Be it a small-scale business or a huge enterprise, our easy-to-use platform provides multiple choices that can be tailored according to your company's branding and marketing strategies.
Our Vision
We are here to make the process of creating QR codes easy and smooth, thus enhancing customer interaction and making business more fluid. We very strongly believe in the ability of QR codes to change the world for businesses in their interaction with customers and are set on making that technology accessible and usable far and wide.
Our Achievements
Ever since its inception, we have successfully served many clients by offering QR codes in their marketing, service delivery, and collection of feedback across various industries. Our platform has been recognized for its ease of use and amazing features, which helped a business to make QR codes.
Our Services
At ViralQR, here is a comprehensive suite of services that caters to your very needs:
Static QR Codes: Create free static QR codes. These QR codes are able to store significant information such as URLs, vCards, plain text, emails and SMS, Wi-Fi credentials, and Bitcoin addresses.
Dynamic QR codes: These also have all the advanced features but are subscription-based. They can directly link to PDF files, images, micro-landing pages, social accounts, review forms, business pages, and applications. In addition, they can be branded with CTAs, frames, patterns, colors, and logos to enhance your branding.
Pricing and Packages
Additionally, there is a 14-day free offer to ViralQR, which is an exceptional opportunity for new users to take a feel of this platform. One can easily subscribe from there and experience the full dynamic of using QR codes. The subscription plans are not only meant for business; they are priced very flexibly so that literally every business could afford to benefit from our service.
Why choose us?
ViralQR will provide services for marketing, advertising, catering, retail, and the like. The QR codes can be posted on fliers, packaging, merchandise, and banners, as well as to substitute for cash and cards in a restaurant or coffee shop. With QR codes integrated into your business, improve customer engagement and streamline operations.
Comprehensive Analytics
Subscribers of ViralQR receive detailed analytics and tracking tools in light of having a view of the core values of QR code performance. Our analytics dashboard shows aggregate views and unique views, as well as detailed information about each impression, including time, device, browser, and estimated location by city and country.
So, thank you for choosing ViralQR; we have an offer of nothing but the best in terms of QR code services to meet business diversity!
Observability Concepts EVERY Developer Should Know -- DeveloperWeek Europe.pdfPaige Cruz
Monitoring and observability aren’t traditionally found in software curriculums and many of us cobble this knowledge together from whatever vendor or ecosystem we were first introduced to and whatever is a part of your current company’s observability stack.
While the dev and ops silo continues to crumble….many organizations still relegate monitoring & observability as the purview of ops, infra and SRE teams. This is a mistake - achieving a highly observable system requires collaboration up and down the stack.
I, a former op, would like to extend an invitation to all application developers to join the observability party will share these foundational concepts to build on:
Builder.ai Founder Sachin Dev Duggal's Strategic Approach to Create an Innova...Ramesh Iyer
In today's fast-changing business world, Companies that adapt and embrace new ideas often need help to keep up with the competition. However, fostering a culture of innovation takes much work. It takes vision, leadership and willingness to take risks in the right proportion. Sachin Dev Duggal, co-founder of Builder.ai, has perfected the art of this balance, creating a company culture where creativity and growth are nurtured at each stage.
Accelerate your Kubernetes clusters with Varnish CachingThijs Feryn
A presentation about the usage and availability of Varnish on Kubernetes. This talk explores the capabilities of Varnish caching and shows how to use the Varnish Helm chart to deploy it to Kubernetes.
This presentation was delivered at K8SUG Singapore. See https://feryn.eu/presentations/accelerate-your-kubernetes-clusters-with-varnish-caching-k8sug-singapore-28-2024 for more details.
UiPath Test Automation using UiPath Test Suite series, part 3DianaGray10
Welcome to UiPath Test Automation using UiPath Test Suite series part 3. In this session, we will cover desktop automation along with UI automation.
Topics covered:
UI automation Introduction,
UI automation Sample
Desktop automation flow
Pradeep Chinnala, Senior Consultant Automation Developer @WonderBotz and UiPath MVP
Deepak Rai, Automation Practice Lead, Boundaryless Group and UiPath MVP
DevOps and Testing slides at DASA ConnectKari Kakkonen
My and Rik Marselis slides at 30.5.2024 DASA Connect conference. We discuss about what is testing, then what is agile testing and finally what is Testing in DevOps. Finally we had lovely workshop with the participants trying to find out different ways to think about quality and testing in different parts of the DevOps infinity loop.
GDG Cloud Southlake #33: Boule & Rebala: Effective AppSec in SDLC using Deplo...James Anderson
Effective Application Security in Software Delivery lifecycle using Deployment Firewall and DBOM
The modern software delivery process (or the CI/CD process) includes many tools, distributed teams, open-source code, and cloud platforms. Constant focus on speed to release software to market, along with the traditional slow and manual security checks has caused gaps in continuous security as an important piece in the software supply chain. Today organizations feel more susceptible to external and internal cyber threats due to the vast attack surface in their applications supply chain and the lack of end-to-end governance and risk management.
The software team must secure its software delivery process to avoid vulnerability and security breaches. This needs to be achieved with existing tool chains and without extensive rework of the delivery processes. This talk will present strategies and techniques for providing visibility into the true risk of the existing vulnerabilities, preventing the introduction of security issues in the software, resolving vulnerabilities in production environments quickly, and capturing the deployment bill of materials (DBOM).
Speakers:
Bob Boule
Robert Boule is a technology enthusiast with PASSION for technology and making things work along with a knack for helping others understand how things work. He comes with around 20 years of solution engineering experience in application security, software continuous delivery, and SaaS platforms. He is known for his dynamic presentations in CI/CD and application security integrated in software delivery lifecycle.
Gopinath Rebala
Gopinath Rebala is the CTO of OpsMx, where he has overall responsibility for the machine learning and data processing architectures for Secure Software Delivery. Gopi also has a strong connection with our customers, leading design and architecture for strategic implementations. Gopi is a frequent speaker and well-known leader in continuous delivery and integrating security into software delivery.
Transcript: Selling digital books in 2024: Insights from industry leaders - T...BookNet Canada
The publishing industry has been selling digital audiobooks and ebooks for over a decade and has found its groove. What’s changed? What has stayed the same? Where do we go from here? Join a group of leading sales peers from across the industry for a conversation about the lessons learned since the popularization of digital books, best practices, digital book supply chain management, and more.
Link to video recording: https://bnctechforum.ca/sessions/selling-digital-books-in-2024-insights-from-industry-leaders/
Presented by BookNet Canada on May 28, 2024, with support from the Department of Canadian Heritage.
Essentials of Automations: Optimizing FME Workflows with ParametersSafe Software
Are you looking to streamline your workflows and boost your projects’ efficiency? Do you find yourself searching for ways to add flexibility and control over your FME workflows? If so, you’re in the right place.
Join us for an insightful dive into the world of FME parameters, a critical element in optimizing workflow efficiency. This webinar marks the beginning of our three-part “Essentials of Automation” series. This first webinar is designed to equip you with the knowledge and skills to utilize parameters effectively: enhancing the flexibility, maintainability, and user control of your FME projects.
Here’s what you’ll gain:
- Essentials of FME Parameters: Understand the pivotal role of parameters, including Reader/Writer, Transformer, User, and FME Flow categories. Discover how they are the key to unlocking automation and optimization within your workflows.
- Practical Applications in FME Form: Delve into key user parameter types including choice, connections, and file URLs. Allow users to control how a workflow runs, making your workflows more reusable. Learn to import values and deliver the best user experience for your workflows while enhancing accuracy.
- Optimization Strategies in FME Flow: Explore the creation and strategic deployment of parameters in FME Flow, including the use of deployment and geometry parameters, to maximize workflow efficiency.
- Pro Tips for Success: Gain insights on parameterizing connections and leveraging new features like Conditional Visibility for clarity and simplicity.
We’ll wrap up with a glimpse into future webinars, followed by a Q&A session to address your specific questions surrounding this topic.
Don’t miss this opportunity to elevate your FME expertise and drive your projects to new heights of efficiency.
Securing your Kubernetes cluster_ a step-by-step guide to success !KatiaHIMEUR1
Today, after several years of existence, an extremely active community and an ultra-dynamic ecosystem, Kubernetes has established itself as the de facto standard in container orchestration. Thanks to a wide range of managed services, it has never been so easy to set up a ready-to-use Kubernetes cluster.
However, this ease of use means that the subject of security in Kubernetes is often left for later, or even neglected. This exposes companies to significant risks.
In this talk, I'll show you step-by-step how to secure your Kubernetes cluster for greater peace of mind and reliability.
De-mystifying Zero to One: Design Informed Techniques for Greenfield Innovati...
roibos-asterisk-bandwidth-saving
1. Silence suppression in Asterisk 1.8
- Codename Roibos
oej@edvina.net * Twitter @oej
Copyright 2014, Edvina AB, Sollentuna Sweden.All rights reserved.
Want to save at least
40% of the bandwidth used for
media in your Asterisk server?
2. This work is funded by Bressner Technology GMBH
(bressner.de) that makes a series of Lync integration
products.
They also distribute Industrial PCs that are excellent as
Asterisk platforms.
Thank you, Bressner, for contributing to Asterisk.
Thank you
If you use Asterisk,
make sure you contribute back
whenever possible.
Thank you Josh and Matt
for the support!
3. An RTP session
Alice Bob
Typical RTP streams consists of UDP/RTP packets sent
every 20 millisecond. With Asterisk today, we need a constant
stream of packets.
But… In a normal
conversation one person
listens while the other one
speaks.
4. With silence suppression
Alice Bob
CN
CN
When the sender detects silence, it sends a CN - Comfort
Noise - request frame. After that no RTP traffic will be seen until
the audio comes back.
This saves a lot of bandwidth in a
normal conversation. Up to 40% bandwidth
savings in a normal call.
5. When we get no RTP from the other side,
Asterisk needs to produce some noise.
CN is agreed on in SDP Offfer/answer and
is only used if both parties support it.
After a few frames of silence, alerts RTP to send
a CN frame and starts dropping frames.
Listens to outbound audio stream and
detects silence. An Asterisk audiohook and DSP.
The various parts
Silence
detection
Silence
suppression
Comfort Noise
support in SDP and RTP
Noise generator
silencedetection.c
silencedetection.c
chan_sip.c, res_rtp_asterisk.c
channel.c
6. Configuration
Add the ”cn” codec to allowed codecs in sip.conf
Add ”silencesuppression=yes”
in the [general] section or device section of sip.conf
Note: If you enable the CN codec but not silence suppression,
we will accept CN but never send a CN frame.
This saves some CPU for silence detection,
but still uses CPU for noice generation.
1.
2.
7. Download roibos
svn checkout http://svn.digium.com/svn/asterisk/team/oej/roibos-cng-support-1.8"
cd roibos-cng-support-1.8
more README.roibos"
./configure"
make"
make install"
!
Test it and report bugs to the
bug tracker, as indicated in the
README file.
Issue: ASTERISK-23624
8. What next?
?
If this code get good feedback,
it’s going to get ported to 12 and trunk,
to be integrated into the standard
version of Asterisk."
!
We do need your help testing it to get there.
Due to release policies it can
not be part of Asterisk
1.8 or 11.
9. F.A.Q.
Why 1.8?
Simply because that’s what we use in the project
this was developed for. Funding for porting it to
other releases is welcome.
Why
chan_sip?
chan_pjsip doesn’t exist in 1.8 (see above). Most of the
work is in the core of Asterisk and will be updated to
other releases after testing and when funding exists.
Why not
IAX2? chan_iax2 does not use RTP media framing.
10. Other RTP-channels
Most of this work is generic in
Asterisk. Other channels may benefit too,
as long as they are using RTP.
Like chan_pjsip in 12 and the
XMPP Jingle drivers.
Time to start coding?
11. Do you need a new
Asterisk feature?
If you need a new Asterisk feature or want to
get general Asterisk or Kamailio
support or training from Edvina,
please contact us - info@edvina.net
Roibus will soon be part of our
version of Asterisk 1.8 - EDVx -
with improved RTCP support, Lync integration
PRACK support, Improved SRTP negotiation,
RTP packet loss concealment and much more.
http://edvina.net * Twitter @edvina