Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service.
Grokking TechTalk #18B: VoIP Architecture For TelecommunicationsGrokking VN
Bài talk chia sẻ kiến thức, kinh nghiệm về kiến trúc VoIP cho các bạn dự định xây dựng hệ thống dựa trên nền tảng VoIP, lập trình phát triển ứng dụng CRM, ERP, POS...tích hợp Call & Contact Center, ứng dụng OTT tích hợp Mobile App và call out PSTN, tương tự dịch vụ Viber Out:
- VoIP Platform
- IP-PBX
- WebRTC Gateway & Client
- Use Cases
About Speaker:
Anh Đạt là cử nhân Toán - Tin học, Thạc sỹ Tài chính - Ngân hàng, hơn 10 năm kinh nghiệm triển khai hệ thống ERP/CRM trên nền tảng Oracle/SAP và triển khai các dịch vụ giá trị gia tăng trên nền viễn thông, Brand Name SMS, Call & Contact Center, VoIP Platform
Voice over IP (VoIP) is a methodology and group of technologies for the delivery of voice communications and multimedia sessions over Internet Protocol (IP) networks, such as the Internet. Other terms commonly associated with VoIP are IP telephony, Internet telephony, broadband telephony, and broadband phone service.
Grokking TechTalk #18B: VoIP Architecture For TelecommunicationsGrokking VN
Bài talk chia sẻ kiến thức, kinh nghiệm về kiến trúc VoIP cho các bạn dự định xây dựng hệ thống dựa trên nền tảng VoIP, lập trình phát triển ứng dụng CRM, ERP, POS...tích hợp Call & Contact Center, ứng dụng OTT tích hợp Mobile App và call out PSTN, tương tự dịch vụ Viber Out:
- VoIP Platform
- IP-PBX
- WebRTC Gateway & Client
- Use Cases
About Speaker:
Anh Đạt là cử nhân Toán - Tin học, Thạc sỹ Tài chính - Ngân hàng, hơn 10 năm kinh nghiệm triển khai hệ thống ERP/CRM trên nền tảng Oracle/SAP và triển khai các dịch vụ giá trị gia tăng trên nền viễn thông, Brand Name SMS, Call & Contact Center, VoIP Platform
Nowadays VoIP technologies have taken the upper hand offering many advantages compared to the traditional telephone network, but what are the security risks involved when voice and data networks come together. In this presentation, we will identify and evaluate these different security risks and their countermeasures both from a defensive as offensive position.
VoIP is short for Voice over Internet Protocol. VoIP is a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions of the PSTN.
Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks.
a seminar paper presentation .this will help you know about voice transmission over the internet protocol's.as in Skype, watts app. it also give an idea about old technology. thanks. if any mistakes ,and add any updates and share with me .on about this slide
Nowadays VoIP technologies have taken the upper hand offering many advantages compared to the traditional telephone network, but what are the security risks involved when voice and data networks come together. In this presentation, we will identify and evaluate these different security risks and their countermeasures both from a defensive as offensive position.
VoIP is short for Voice over Internet Protocol. VoIP is a category of hardware and software that enables people to use the Internet as the transmission medium for telephone calls by sending voice data in packets using IP rather than by traditional circuit transmissions of the PSTN.
Voice over Internet Protocol (VoIP) is a general term for a family of transmission technologies for delivery of voice communications over IP networks such as the Internet or other packet-switched networks.
a seminar paper presentation .this will help you know about voice transmission over the internet protocol's.as in Skype, watts app. it also give an idea about old technology. thanks. if any mistakes ,and add any updates and share with me .on about this slide
This research work investigates and improves the performance of Voice over Internet Protocol (VoIP) traffic using IPV4 and IPV6 over WiMAX networks and the impact of various voice codec schemes and statistical distribution for Voice over Internet Protocol (VoIP) over WiMAX has been investigated in detail.
Join us for an introductory webinar on VoIP and learn:
- The fundamental principles of VoIP including RTP and SIP
- What voice metrics to measure and why they matter
- The different methods to monitor and troubleshoot VoIP
In this white paper, VoIP for Beginners, you’ll be introduced to how VoIP works.
Discover what occurs when a VoIP call is placed and received
Understand the key technical terms and learn the issues that affect bandwidth and call quality Learn three issues to consider when defining VoIP call quality
The objective of study is to guarantee QoS for multiple service class traffic in a multiple connection environment and to examine a case of QoS deployment over a cellular WiMAX network. In particular, the thesis compares the performance how much bandwidth for voip
Rise of multimedia and network technologies, multimedia has become an indispensable feature on the Internet.
Animation, voice and video clips become more and more popular on the Internet. Multimedia networking products like Internet telephony, Internet TV, video conferencing have appeared on the market
Voice over Internet Protocol (VoIP), is a technology that allows to make voice calls using a broadband Internet connection instead of a regular (or analog) phone line (PSTN).
you can be friend with me on orkut
"mangalforyou@gmail.com" : i belive in sharing the knowledge so please send project reports ,seminar and ppt. to me .
Building an effective product strategy (Early stage start-ups) - UX India, 2013Pankaj Saharan
Presentation by Pankaj Saharan in UX India 2013 Conference held at IIM Bangalore, India.
Topic: Building an effective product strategy (Early stage start-ups)
Key Trends Shaping the Future of Infrastructure.pdfCheryl Hung
Keynote at DIGIT West Expo, Glasgow on 29 May 2024.
Cheryl Hung, ochery.com
Sr Director, Infrastructure Ecosystem, Arm.
The key trends across hardware, cloud and open-source; exploring how these areas are likely to mature and develop over the short and long-term, and then considering how organisations can position themselves to adapt and thrive.
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!
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
The Art of the Pitch: WordPress Relationships and SalesLaura Byrne
Clients don’t know what they don’t know. What web solutions are right for them? How does WordPress come into the picture? How do you make sure you understand scope and timeline? What do you do if sometime changes?
All these questions and more will be explored as we talk about matching clients’ needs with what your agency offers without pulling teeth or pulling your hair out. Practical tips, and strategies for successful relationship building that leads to closing the deal.
Smart TV Buyer Insights Survey 2024 by 91mobiles.pdf91mobiles
91mobiles recently conducted a Smart TV Buyer Insights Survey in which we asked over 3,000 respondents about the TV they own, aspects they look at on a new TV, and their TV buying preferences.
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.
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.
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
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LF Energy Webinar: Electrical Grid Modelling and Simulation Through PowSyBl -...DanBrown980551
Do you want to learn how to model and simulate an electrical network from scratch in under an hour?
Then welcome to this PowSyBl workshop, hosted by Rte, the French Transmission System Operator (TSO)!
During the webinar, you will discover the PowSyBl ecosystem as well as handle and study an electrical network through an interactive Python notebook.
PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
- Visualization tools to display your network;
- Grid simulation tools, such as power flows, security analyses (with or without remedial actions) and sensitivity analyses;
The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
- For beginners: discover PowSyBl's functionalities through a quick general presentation and the notebook, without needing any expert coding skills;
- For advanced developers: master the skills to efficiently apply PowSyBl functionalities to your real-world scenarios.
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.
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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.
2. Contents
• How VoIP came into picture?
• What is VoIP exactly?
• What are the advantages?
• How can we use it?
• What are the different standards?
• Who are the different service providers?
• What technology the leader in VoIP is using?
• What are the challenges ahead
• How is the future
3. Circuit-Switched Telephony
Traditional PSTN Approach
SCP
SS7 Signaling Network
Signaling
Class 5
Switch
Class 4
Switch
Most service logic in
local switches, rest in
SCPs
Circuit-based Trunks
64 kb/s digital voice
Typically analog “loop”,
conversion to digital at
local switch
Media stream
• Data travels over a parallel (but separate) network
Class 5
Switch
4. When was the last time you called the phone company just to say, "I am just
calling to say thank you for my phone service being so reliable?"
“The truth is phone companies work to have an uptime of 99.999%”.
Then,
VOIP ???????
5. “Voice over IP (VoIP) defines a way to carry voice calls over an IP
network including the digitization and packetization of the voice
streams. IP Telephony utilizes the VoIP standards to create a
telephony system where higher level features such as advanced call
routing, voice mail, contact centers, etc., can be utilized.”
6. What Is VoIP?
Public Switched
Telephone Network
Initially, PC to PC
voice calls over the
Internet
Gateways allow PCs to
also reach phones
PSTN
(NY)
Gateway
Multimedia
PC
Gateway
IP Network
Multimedia
PC
PSTN
(DC)
…or phones to reach
phones
7. Origins of VoIP
Lessons learned
• Internet Telephony software for multimedia PCs (1995)
• Users frustrated by poor QoS, difficulty of use, lack of interoperability
S ta nd ards a re critical f or s ucces s
Coding/de coding (c ode c) be twe en analog voic e and digi tal packe ts
L oc ati ng the par ty you want to cal l
Signali ng to s et up, m
odify, tear down the voic e c all
Acc es s to ve rtic al ser vi ces (c all forwar di ng, 3-way calling, …)
Gate ways to P N
ST
•
•
•
•
•
•
8.
9.
10. VoIP
Goals and Potential Benefits
• Reduced cost
• Mobility
• Consolidation of voice, data on a single network
• Simplify infrastructure, operations; provide bundled services
• Support for intelligent terminals as well as phones
• Increased flexibility
• Multiple bit rates, multiple media types, richer signaling
• Separation of service control from switching/routing
• Accelerate new service development, increase end-user control, evolve from VoIP
towards advanced services
• Expansion of competition
11. Packet Voice Transport
• Key targets for voice call service quality:
• Average packet loss: < 2%
• End-to-end (lip-to-ear) delay: < 150 ms for comfortable conversation
• Packet loss cannot be corrected by retransmission (TCP), because the
packets arrive too late to be useful
• Use RTP (Real-time Transport Protocol) over UDP (User Datagram
Protocol) for voice or video transport
• Payload ID, sequence numbers, timestamps, monitoring via RTCP
• Packet and buffer lengths limited by constraint on end-to-end delay
• Typical codes: G.711 (64 kb/s), G.729 (8 kb/s) G.723 (~ 6 kb/s)
• Transmitted bit rates depend on overheads, optional silence suppression
16. NETGEAR- Skype WiFi Phone
• A mobile WiFi phone that enables you (without a PC) to
make free Internet calls to anyone else in the world who
has Skype.
• Makes calls wherever you have open WiFi access
• Communicates with ordinary phones worldwide for
pennies a minute
• Manages your contact list and displays who's available
to talk
• Designed to deploy Wireless Encryption Protocol
(WEP) for WiFi security.
18. What is SIP?
“
Session Initiation Protocol - An application
layer signaling protocol that defines
initiation, modification and termination of
interactive, multimedia communication
sessions between users.
IETF RFC 2543 Session Initiation Protocol
”
19. SIP Messages – Methods and Responses
SIP components communicate by exchanging SIP messages:
•
SIP Methods:
– INVITE – Initiates a call by inviting
user to participate in session.
– ACK - Confirms that the client has
received a final response to an
INVITE request.
– BYE - Indicates termination of the
call.
– CANCEL - Cancels a pending
request.
– REGISTER – Registers the user
agent.
– OPTIONS – Used to query the
capabilities of a server.
– INFO – Used to carry out-of-bound
information, such as DTMF digits.
•
SIP Responses:
–
–
–
–
–
–
1xx - Informational Messages.
2xx - Successful Responses.
3xx - Redirection Responses.
4xx - Request Failure Responses.
5xx - Server Failure Responses.
6xx - Global Failures Responses.
20. Simplified SIP Call Setup and Teardown
Proxy Server
User Agent
INVITE
Location/Redirect Server
INVITE
302
(Moved Temporarily)
User Agent
Proxy Server
ACK
INVITE
INVITE
302
(Moved Temporarily)
ACK
Call
Setup
180 (Ringing)
200 (OK)
ACK
Media
Path
Call
Teardown
180 (Ringing)
200 (OK)
ACK
INVITE
180 (Ringing)
200 (OK)
ACK
RTP MEDIA PATH
BYE
BYE
BYE
200 (OK)
200 (OK)
200 (OK)
21. SIMPLE (SIP for IM and Presence)
Simplified Example
lts.ncsc.mil
telcordia.com
Presence
server
Proxy
SUBSCRIBE
peter@telcordia.com
Linda
SUBSCRIBE
NOTIFY
NOTIFY
Proxy
Update
Presence
Peter
Linda subscribes to notifications of changes in Peter’s status:
Off-line, on-line, busy, away, available, ...
22. SIP – Design Framework
• SIP was designed for:
• Integration with existing IETF protocols.
• Scalability and simplicity.
• Mobility.
• Easy feature and service creation.
23. What is H.323?
“
Describes terminals and other entities that provide
multimedia communications services over Packet
Based Networks (PBN) which may not provide a
guaranteed Quality of Service. H.323 entities may
provide real-time audio, video and/or data
communications.
ITU-T Recommendation H.323 Version 4
”
25. Simplified H.323 Call Setup
– Both endpoints have previously
registered with the gatekeeper.
– Terminal A initiate the call to the
gatekeeper. (RAS messages are
exchanged).
– The gatekeeper provides
information for Terminal A to
contact Terminal B.
– Terminal A sends a SETUP message
to Terminal B.
– Terminal B responds with a Call
Proceeding message and also
contacts the gatekeeper for
permission.
– Terminal B sends a Alerting and
Connect message.
– Terminal B and A exchange H.245
messages to determine master slave,
terminal capabilities, and open
logical channels.
– The two terminals establish RTP
media paths.
Terminal A
Gatekeeper
Terminal B
1. ARQ
2. ACF
3. SETUP
4. Call Proceeding
5. ARQ
6. ACF
7.Alerting
8.Connect
H.245 Messages
RTP Media Path
RAS messages
Call Signaling Messages
Note: This diagram only illustrates a simple pointto-point call setup where call signaling is not routed
to the gatekeeper. Refer to the H.323
recommendation for more call setup scenarios.
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“Better quality at no cost”
Jason Donahue, Meiosys (30 May 2005)
To G
“Sk oogle
is
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put
t
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4)
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not, has bec er you like it or
no ex
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Jeff Pulver
s
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05)
Bus
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ame”
2005 iness We
ek (3
)
0 Ma
y
“Every now and then a company [Skype] comes along
with an idea that’s not only good and marketable but
that captures the spirit of the moment”
FierceWireless (2005)
29. With very rich functionality
Send any kind of file
Find other Skype users
Global Directory
Make conference calls
Instant Messaging
Online Presence
Groups ($)
Wallet ($)
Contact list
Voice content market ($)
Call any phone ($)
Expressive Content ($)
Get calls from any phone on
your Skype client ($)
Forward calls to any
number ($)
Video
Leave voicemail ($)
30.
31. With a fast-growing ecosystem
Voice Content
Marketplace
Digital Goods
Marketplace
1000+
Developers
200+ Hardware
devices labeled as
Skype-compatible
30+ partnerships
with world-class
companies
10,000+ Affiliates
150+ Skype-enabled
Applications
35. Top Economic and Technical Challenges for VoIP Deployment
- Which are the most critical?
Consumer
Subscription
Development/Deploy
ment
Revenue Assurance
Taxation
QoS
Standards (IETF, ITU,
ANSI/ATIS)
E911
Security
Lawful Surveillance
0.00%
10.00%
20.00%
30.00%
40.00%
36. VoIP Security Issues
VoIP…….
• Adds new access points to the corporate network
• Adds new devices that can be attacked or used to launch attacks
• Adds new protocols to be used to launch threats
• Adds a new channel for blended threats…
37. VoIP Security Axioms
• Voice networks are targets
• Data and voice segmentation is key
• Telephony devices don’t support
confidentiality
• IP-phones provide access to datavoice segments
• PC-based IP phones require open
access
• PC-based IP phones are
especially susceptible to attacks
• Controlling the voice-to-data
segment interaction is key
• Establishing identity is key
• Rogue devices pose serious
threats
• Secure and monitor all voice
servers and segments
38. VoIP Security Challenges
• Quality of Service (QoS)
• Latency
• Jitter
• Packet loss
• Security Breaches
• Access
• Disruption
• Confidentiality and privacy
• Network Elements
•
•
•
•
•
•
Denial of Service (DoS)
Power failure
Viruses, Trojan Horse
Physical security
Operating System
Life and Safety (E-911)
• 802.11
• Protocols
• H.323
• SIP
39. Issues in accessing emergency services
• Identify call as emergency call (large number of different national emergency
numbers)
• Information on the location of the caller.
• Routing emergency call to the appropriate emergency center.
• Delivering call with CLI and providing call back possibility.
42. My Guess at the future:
• High speed wireless access
• Collaboration Age
• SIP trunks from carriers
• Large scale adoption of video
• Telecommunications Mega-Mergers
• IP TV
• P2P-SIP Hybrid Model for VoIP
• SIP Growth
What do you think ?