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.
The document discusses using SIP (Session Initiation Protocol) for applications beyond just voice over IP (VoIP) communication. It describes how SIP was designed to be extensible with different media streams beyond just audio and video. It provides examples of using SIP for presence, instant messaging, file transfer and desktop sharing using protocols like SIMPLE, MSRP. It also discusses building collaboration tools with SIP, including features like conferencing, chat rooms and screen sharing. The document promotes moving beyond just VoIP with SIP to enable new communication and collaboration applications.
The document discusses vulnerabilities and attacks against Voice over IP (VoIP) systems. It begins with an introduction to VoIP architecture, components, and protocols. It then covers vulnerabilities and common attack vectors against VoIP, such as identity spoofing, eavesdropping, password cracking, and denial of service attacks. The document demonstrates some example attacks and outlines tools that can be used for scanning, attacking, and testing the security of VoIP systems. It concludes with recommendations for countermeasures like firewalls, encryption, and network hardening to better secure VoIP infrastructures.
A VoIP gateway acts as an interface between a public switched telephone network (PSTN) and an IP network, converting voice and fax calls between the two in real time. Key functions include voice and fax compression/decompression, packetization, and call routing. There are analog gateways for connecting PSTN lines to VoIP systems and digital gateways for connecting PBX systems. When selecting a gateway, factors to consider include call load, supported protocols and compatibility, and cost.
Introduction to VoIP, 2nd chapter of "Unified Communications with Elastix" Vol.1
We recommend to read the chapter along with the presentation.
http://elx.ec/chapter2
The document is a presentation by BroadConnect Telecom that introduces VoIP technology and BroadConnect's VoIP-enabled products and services. It defines VoIP as the delivery of voice communications over IP networks using standards-based protocols. It then describes BroadConnect's SIP server, IP phones, gateways, audio/video conferencing units, and IP cameras. The presentation explains how VoIP works by using codecs like G.711 to transfer voice data over the IP network. It outlines VoIP's advantages of low cost and security, as well as its need for constant power and internet connectivity. BroadConnect provides hosted PBX, SIP trunking, phone lines, communication services, internet services, and hosting solutions to help businesses simplify communications
The Art of VoIP Hacking - Defcon 23 WorkshopFatih Ozavci
VoIP attacks have evolved, and they are targeting Unified Communications (UC), commercial services, hosted environment and call centres using major vendor and protocol vulnerabilities. This workshop is designed to demonstrate these cutting edge VoIP attacks, and improve the VoIP skills of the incident response teams, penetration testers and network engineers. Signalling protocols are the centre of UC environments, but also susceptible to IP spoofing, trust issues, call spoofing, authentication bypass and invalid signalling flows. They can be hacked with legacy techniques, but a set of new attacks will be demonstrated in this workshop. This workshop includes basic attack types for UC infrastructure, advanced attacks to the SIP and Skinny protocol weaknesses, network infrastructure attacks, value added services analysis, Cdr/Log/Billing analysis and Viproy use to analyse signalling services using novel techniques. Also the well-known attacks to the network infrastructure will be combined with the current VoIP vulnerabilities to test the target workshop network. Attacking VoIP services requires limited knowledge today with the Viproy Penetration Testing Kit (written by Fatih). It has a dozen modules to test trust hacking issues, information collected from SIP and Skinny services, gaining unauthorised access, call redirection, call spoofing, brute-forcing VoIP accounts, Cisco CUCDM exploitation and debugging services using as MITM. Furthermore, Viproy provides these attack modules in the Metasploit Framework environment with full integration. The workshop contains live demonstration of practical VoIP attacks and usage of the Viproy modules.
In this hands-on workshop, attendees will learn about basic attack types for UC infrastructure, advanced attacks to the SIP protocol weaknesses, Cisco Skinny protocol hacking, hacking Cisco CUCDM and CUCM servers, network infrastructure attacks, value added services analysis, Cdr/Log/Billing analysis and Viproy VoIP pen-test kit to analyse VoIP services using novel techniques. New CDP, CUCDM and Cisco Skinny modules and techniques of Viproy will be demonstrated in the workshop as well.
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.
The document discusses using SIP (Session Initiation Protocol) for applications beyond just voice over IP (VoIP) communication. It describes how SIP was designed to be extensible with different media streams beyond just audio and video. It provides examples of using SIP for presence, instant messaging, file transfer and desktop sharing using protocols like SIMPLE, MSRP. It also discusses building collaboration tools with SIP, including features like conferencing, chat rooms and screen sharing. The document promotes moving beyond just VoIP with SIP to enable new communication and collaboration applications.
The document discusses vulnerabilities and attacks against Voice over IP (VoIP) systems. It begins with an introduction to VoIP architecture, components, and protocols. It then covers vulnerabilities and common attack vectors against VoIP, such as identity spoofing, eavesdropping, password cracking, and denial of service attacks. The document demonstrates some example attacks and outlines tools that can be used for scanning, attacking, and testing the security of VoIP systems. It concludes with recommendations for countermeasures like firewalls, encryption, and network hardening to better secure VoIP infrastructures.
A VoIP gateway acts as an interface between a public switched telephone network (PSTN) and an IP network, converting voice and fax calls between the two in real time. Key functions include voice and fax compression/decompression, packetization, and call routing. There are analog gateways for connecting PSTN lines to VoIP systems and digital gateways for connecting PBX systems. When selecting a gateway, factors to consider include call load, supported protocols and compatibility, and cost.
Introduction to VoIP, 2nd chapter of "Unified Communications with Elastix" Vol.1
We recommend to read the chapter along with the presentation.
http://elx.ec/chapter2
The document is a presentation by BroadConnect Telecom that introduces VoIP technology and BroadConnect's VoIP-enabled products and services. It defines VoIP as the delivery of voice communications over IP networks using standards-based protocols. It then describes BroadConnect's SIP server, IP phones, gateways, audio/video conferencing units, and IP cameras. The presentation explains how VoIP works by using codecs like G.711 to transfer voice data over the IP network. It outlines VoIP's advantages of low cost and security, as well as its need for constant power and internet connectivity. BroadConnect provides hosted PBX, SIP trunking, phone lines, communication services, internet services, and hosting solutions to help businesses simplify communications
The Art of VoIP Hacking - Defcon 23 WorkshopFatih Ozavci
VoIP attacks have evolved, and they are targeting Unified Communications (UC), commercial services, hosted environment and call centres using major vendor and protocol vulnerabilities. This workshop is designed to demonstrate these cutting edge VoIP attacks, and improve the VoIP skills of the incident response teams, penetration testers and network engineers. Signalling protocols are the centre of UC environments, but also susceptible to IP spoofing, trust issues, call spoofing, authentication bypass and invalid signalling flows. They can be hacked with legacy techniques, but a set of new attacks will be demonstrated in this workshop. This workshop includes basic attack types for UC infrastructure, advanced attacks to the SIP and Skinny protocol weaknesses, network infrastructure attacks, value added services analysis, Cdr/Log/Billing analysis and Viproy use to analyse signalling services using novel techniques. Also the well-known attacks to the network infrastructure will be combined with the current VoIP vulnerabilities to test the target workshop network. Attacking VoIP services requires limited knowledge today with the Viproy Penetration Testing Kit (written by Fatih). It has a dozen modules to test trust hacking issues, information collected from SIP and Skinny services, gaining unauthorised access, call redirection, call spoofing, brute-forcing VoIP accounts, Cisco CUCDM exploitation and debugging services using as MITM. Furthermore, Viproy provides these attack modules in the Metasploit Framework environment with full integration. The workshop contains live demonstration of practical VoIP attacks and usage of the Viproy modules.
In this hands-on workshop, attendees will learn about basic attack types for UC infrastructure, advanced attacks to the SIP protocol weaknesses, Cisco Skinny protocol hacking, hacking Cisco CUCDM and CUCM servers, network infrastructure attacks, value added services analysis, Cdr/Log/Billing analysis and Viproy VoIP pen-test kit to analyse VoIP services using novel techniques. New CDP, CUCDM and Cisco Skinny modules and techniques of Viproy will be demonstrated in the workshop as well.
VoIP stands for Voice over Internet Protocol. It allows users to make phone calls using an IP network rather than a traditional telephone network. VoIP works by converting voice into packets of data that travel over the internet through routers to reach the destination. While it is beginning to be used more in businesses due to lower costs, some reliability issues with lost data packets can cause jittering and lower sound quality compared to traditional phone networks.
Overview of VoIP (Voice over IP) and FoIP (Fax over IP) technologies like Session Initiation Protocol and H.323.
Even though voice over IP (VoIP) was hailed as a technological innovation, the idea to transport real-time traffic over TCP/IP networks was not new back in the 1990s when VoIP started being deployed in networks. Chapter 2.5 of the venerable RFC793 (TCP) shows both data oriented application traffic as well as voice being transported over IP based networks.
Nevertheless, VoIP puts high demands on signal and protocol processing capabilities so it became possible at reasonable costs only in the 1990s.
VoIP can be roughly split into two main functions. Signaling protocols like SIP (Session Initiation Protocol), H.323 and MGCP/H.248 are used to establish a conference session and the data path for transporting real-time voice data packets. SIP has largely supplanted H.323 in recent years to its simpler structure and packet sequences. MGCP and H.248 are mostly used in carrier backbone networks.
Protocols like RTP (Real Time Protocol) transport voice packets and provide the necessary information for receivers to equalize packet flow variations to provide a smooth playback of the original voice signal.
Voice codecs are one of the core functions of the data path. Voice compression reduces the bandwidth required to transport voice over an IP based network. Compression may be less of a concern in local area networks with gigabit speeds, on slower links like 3G (UMTS, LTE) it still makes a lot of sense.
The algorithms used in different codecs make use of various characteristics of the characteristics of human speech recognition. Redundant information is removed from the signals thus slightly reducing the quality, but greatly reducing the required bandwidth.
In VoIP networks, the echo problem is typically compounded by the increased delay incurred by packetization of voice signals. To counteract the echo problem, VoIP gear (hard phones, soft phones, gateways) include echo cancelers to remove echo signals from the transmit signal.
To transport facsimile over an IP based network, even more technology is needed. Facsimile protocols are very susceptible to delay and delay variation and thus need more compensation algorithms. Protocols like T.38 terminate facsimile protocols like T.30 (analog facsimile) and transport the fax images as digitized pictures over IP based networks.
VoIP allows users to make phone calls using an Internet connection instead of a traditional phone line. It works by converting voice signals to digital data that is transmitted in packets over the Internet. A VoIP network uses protocols like SIP and RTP to setup calls and transmit voice data. Components include VoIP protocols, gateways to interface with the PSTN, and codecs to compress voice signals. Businesses are attracted to VoIP as it can help reduce costs while improving utilization of bandwidth and network management. However, security risks like hacking and eavesdropping exist since VoIP uses the public Internet.
Recording Remote Hosts/Interviews with VoIP/SkypeDan York
The document discusses various methods for recording remote interviews or co-hosts using VoIP/Skype. It covers using built-in recording features, third-party software programs, external recorders, mix minus techniques, and considerations for quality, portability and cost. Specific software and tools are also mentioned, including Audio Hijack Pro, Wiretap Studio, and using an external mixer or recorder with a mix minus configuration.
VoIP is a technology that allows transmission of voice and multimedia communications over IP networks like the internet rather than traditional phone networks. It converts media like voice and video into digital signals using protocols like SIP and RTP, compresses the signals into IP packets, and sends them over IP networks. At the receiving end, the packets are reassembled and converted back into an analog format. VoIP has advantages like lower costs, mobility, and support for features like conferencing. However, it also faces disadvantages such as potential quality issues, power dependency, and lack of support for emergency services. Research has found that lower communication costs is the main driver for many companies adopting VoIP services within their organizations.
1. The document introduces VoIP concepts and presents Asterisk as a free and open source PBX software solution that is well-suited for implementing VoIP networks in developing regions.
2. It discusses challenges in developing regions like lack of technical knowledge and affordable infrastructure, and how VoIP solutions like Asterisk can help address these issues by providing flexibility.
3. The document provides an overview of topics covered like basic VoIP concepts, how to set up an Asterisk PBX, equipment options, and presents a case study of introducing VoIP services.
VoIP allows users to make phone calls using an internet connection instead of a regular phone line. It works by converting voice signals from phones into digital data packets that can be transmitted over the internet or broadband connection. Common VoIP protocols include SIP, H.323, and IAX. VoIP has benefits like lower call costs, integration of voice and data, and added features like video calling. It has applications in agriculture by providing communication for remote farmers through initiatives like the Caribbean Farmers Network and the Timbaktu Collective project in India.
Voice Over Internet Protocol (VoIP) allows both voice and data calls to be made over an Internet Protocol (IP) network. It integrates telephone services and computer applications, providing a more flexible and cost-effective communication system compared to traditional telephone networks. The document describes a student project to implement VoIP using software on a local area network, which successfully transmitted sound between a phone, computer, and between computers. It discusses expanding the system to support multiple simultaneous users over the Internet.
Efficient Telecommunication Infrastructure with Internet Telephony (VoIP)Thomas Siegers
This document provides an overview of efficient telecommunication infrastructure using Internet telephony (VoIP). It discusses basics of telephony and networking, protocols like SIP and RTP, VoIP hardware, service providers, and examples of integrating VoIP into networks and PBX systems. Skype and issues with it are also covered. The presentation aims to explain how VoIP works and scenarios for implementing efficient VoIP solutions.
Setting up VoIP management server using a communication framework and let the users from LTE networks to register and make voice calls over IP system as well as video session.
VoIP Wars: Destroying Jar Jar Lync (Filtered version)Fatih Ozavci
Enterprise companies are increasingly using Microsoft Lync 2010/2013 (a.k.a Skype for Business 2015) services as call centre, internal communication, cloud communication and video conference platform. These services are based on the VoIP and instant messaging protocols, and support multiple client types such as Microsoft Office 365, Microsoft Lync, Skype for Business, IP phones and teleconference devices. Also the official clients are available for mobile devices (e.g. Windows phone, Android and iOS), desktops (Mac, Linux and Windows) and web applications developed with .NET framework. Although the Microsoft Lync platform has been developed along with the new technologies, it still suffers from old VoIP, teleconference and platform issues.
Modern VoIP attacks can be used to attack Microsoft Lync environments to obtain unauthorised access to the infrastructure. Open MS Lync frontend and edge servers, insecure federation security design, lack of encryption, insufficient defence for VoIP attacks and insecure compatibility options may allow attackers to hijack enterprise communications. The enterprise users and employees are also the next generation targets for these attackers. They can attack client soft phones and handsets using the broken communication, invalid protocol options and malicious messaging content to compromise sensitive business assets. These attacks may lead to privacy violations, legal issues, call/toll fraud and intelligence collection.
Attack vectors and practical threats against the Microsoft Lync ecosystem will be presented with newly published vulnerabilities and Microsoft Lync testing modules of the Viproy VoIP kit developed by the speaker. This will be accompanied by live demonstrations against a test environment.
• A brief introduction to Microsoft Lync ecosystem
• Security requirements, design vulnerabilities and priorities
• Modern threats against commercial Microsoft Lync services
• Demonstration of new attack vectors against target test platform
This document discusses building a SIP softswitch using Asterisk and Asterisk-Java. It describes using Asterisk to handle SIP signaling, media processing, and interfacing with a Java routing application. The Java application directs call routing and interfaces with Asterisk via FastAGI and AMI. Key issues addressed include having call legs survive independently and supporting early media. Patches are used to enable call bridging and configurable early media handling in app_dial.
The document introduces VoIP (Voice over IP) concepts. It discusses digitization of audio, real-time compression/encoding, transport over UDP, and problems with UDP like packet loss and jitter. It also covers protocols like SIP for signaling, SDP for session description, and RTP for media transport. Key VoIP services that can be implemented with SIP are discussed, like call transfer and voicemail.
1. VoIP phone systems allow businesses to continue operations remotely in the event of a disaster by enabling call forwarding to mobile phones and other locations. This provides business continuity.
2. VoIP solutions can reduce telephony costs by up to 35% compared to traditional phone systems. Entanet's hosted voice packages also include calls within the monthly fee per user, providing predictable monthly costs.
3. VoIP systems can help mitigate telephony fraud risks by using strong passwords, excluding high-risk call destinations by default, and monitoring for fraudulent IP addresses. Daily and monthly account limits also limit potential damage from breaches.
Do you want to use NGN services? Do you have a SIP trunk service? Are you going to connect SIP trunk to your traditional PBX?
In this webinar we'll help you to achieve this.
www.senatelecom.com
Introduction to NFV and its Open ecosystemMalihe Asemani
1st Iran NFV Open Community-2nd IRAN OPNFV Meetup
Main Topics:
- An overview on the impact of Open Source and Cloud on telecommunication networks
- A brief review on NFV, its advantages, related products, and OPNFV project
Operational Challenges and ST’s Proposed Solutions to Improve Collaboration b...Sina Bagherinezhad
Operational Challenges and ST’s Proposed Solutions to Improve Collaboration between IP and R&D in Innovation processes
by Fabrizio Cesaroni & Andrea Piccaluga.
UNIVERSITY OF CALIFORNIA, BERKELEY, VOL. 55, NO. 4, SUMMER 2013, CMR.BERKELEY.EDU
For presentation in Farsi.
VoIP stands for Voice over Internet Protocol. It allows users to make phone calls using an IP network rather than a traditional telephone network. VoIP works by converting voice into packets of data that travel over the internet through routers to reach the destination. While it is beginning to be used more in businesses due to lower costs, some reliability issues with lost data packets can cause jittering and lower sound quality compared to traditional phone networks.
Overview of VoIP (Voice over IP) and FoIP (Fax over IP) technologies like Session Initiation Protocol and H.323.
Even though voice over IP (VoIP) was hailed as a technological innovation, the idea to transport real-time traffic over TCP/IP networks was not new back in the 1990s when VoIP started being deployed in networks. Chapter 2.5 of the venerable RFC793 (TCP) shows both data oriented application traffic as well as voice being transported over IP based networks.
Nevertheless, VoIP puts high demands on signal and protocol processing capabilities so it became possible at reasonable costs only in the 1990s.
VoIP can be roughly split into two main functions. Signaling protocols like SIP (Session Initiation Protocol), H.323 and MGCP/H.248 are used to establish a conference session and the data path for transporting real-time voice data packets. SIP has largely supplanted H.323 in recent years to its simpler structure and packet sequences. MGCP and H.248 are mostly used in carrier backbone networks.
Protocols like RTP (Real Time Protocol) transport voice packets and provide the necessary information for receivers to equalize packet flow variations to provide a smooth playback of the original voice signal.
Voice codecs are one of the core functions of the data path. Voice compression reduces the bandwidth required to transport voice over an IP based network. Compression may be less of a concern in local area networks with gigabit speeds, on slower links like 3G (UMTS, LTE) it still makes a lot of sense.
The algorithms used in different codecs make use of various characteristics of the characteristics of human speech recognition. Redundant information is removed from the signals thus slightly reducing the quality, but greatly reducing the required bandwidth.
In VoIP networks, the echo problem is typically compounded by the increased delay incurred by packetization of voice signals. To counteract the echo problem, VoIP gear (hard phones, soft phones, gateways) include echo cancelers to remove echo signals from the transmit signal.
To transport facsimile over an IP based network, even more technology is needed. Facsimile protocols are very susceptible to delay and delay variation and thus need more compensation algorithms. Protocols like T.38 terminate facsimile protocols like T.30 (analog facsimile) and transport the fax images as digitized pictures over IP based networks.
VoIP allows users to make phone calls using an Internet connection instead of a traditional phone line. It works by converting voice signals to digital data that is transmitted in packets over the Internet. A VoIP network uses protocols like SIP and RTP to setup calls and transmit voice data. Components include VoIP protocols, gateways to interface with the PSTN, and codecs to compress voice signals. Businesses are attracted to VoIP as it can help reduce costs while improving utilization of bandwidth and network management. However, security risks like hacking and eavesdropping exist since VoIP uses the public Internet.
Recording Remote Hosts/Interviews with VoIP/SkypeDan York
The document discusses various methods for recording remote interviews or co-hosts using VoIP/Skype. It covers using built-in recording features, third-party software programs, external recorders, mix minus techniques, and considerations for quality, portability and cost. Specific software and tools are also mentioned, including Audio Hijack Pro, Wiretap Studio, and using an external mixer or recorder with a mix minus configuration.
VoIP is a technology that allows transmission of voice and multimedia communications over IP networks like the internet rather than traditional phone networks. It converts media like voice and video into digital signals using protocols like SIP and RTP, compresses the signals into IP packets, and sends them over IP networks. At the receiving end, the packets are reassembled and converted back into an analog format. VoIP has advantages like lower costs, mobility, and support for features like conferencing. However, it also faces disadvantages such as potential quality issues, power dependency, and lack of support for emergency services. Research has found that lower communication costs is the main driver for many companies adopting VoIP services within their organizations.
1. The document introduces VoIP concepts and presents Asterisk as a free and open source PBX software solution that is well-suited for implementing VoIP networks in developing regions.
2. It discusses challenges in developing regions like lack of technical knowledge and affordable infrastructure, and how VoIP solutions like Asterisk can help address these issues by providing flexibility.
3. The document provides an overview of topics covered like basic VoIP concepts, how to set up an Asterisk PBX, equipment options, and presents a case study of introducing VoIP services.
VoIP allows users to make phone calls using an internet connection instead of a regular phone line. It works by converting voice signals from phones into digital data packets that can be transmitted over the internet or broadband connection. Common VoIP protocols include SIP, H.323, and IAX. VoIP has benefits like lower call costs, integration of voice and data, and added features like video calling. It has applications in agriculture by providing communication for remote farmers through initiatives like the Caribbean Farmers Network and the Timbaktu Collective project in India.
Voice Over Internet Protocol (VoIP) allows both voice and data calls to be made over an Internet Protocol (IP) network. It integrates telephone services and computer applications, providing a more flexible and cost-effective communication system compared to traditional telephone networks. The document describes a student project to implement VoIP using software on a local area network, which successfully transmitted sound between a phone, computer, and between computers. It discusses expanding the system to support multiple simultaneous users over the Internet.
Efficient Telecommunication Infrastructure with Internet Telephony (VoIP)Thomas Siegers
This document provides an overview of efficient telecommunication infrastructure using Internet telephony (VoIP). It discusses basics of telephony and networking, protocols like SIP and RTP, VoIP hardware, service providers, and examples of integrating VoIP into networks and PBX systems. Skype and issues with it are also covered. The presentation aims to explain how VoIP works and scenarios for implementing efficient VoIP solutions.
Setting up VoIP management server using a communication framework and let the users from LTE networks to register and make voice calls over IP system as well as video session.
VoIP Wars: Destroying Jar Jar Lync (Filtered version)Fatih Ozavci
Enterprise companies are increasingly using Microsoft Lync 2010/2013 (a.k.a Skype for Business 2015) services as call centre, internal communication, cloud communication and video conference platform. These services are based on the VoIP and instant messaging protocols, and support multiple client types such as Microsoft Office 365, Microsoft Lync, Skype for Business, IP phones and teleconference devices. Also the official clients are available for mobile devices (e.g. Windows phone, Android and iOS), desktops (Mac, Linux and Windows) and web applications developed with .NET framework. Although the Microsoft Lync platform has been developed along with the new technologies, it still suffers from old VoIP, teleconference and platform issues.
Modern VoIP attacks can be used to attack Microsoft Lync environments to obtain unauthorised access to the infrastructure. Open MS Lync frontend and edge servers, insecure federation security design, lack of encryption, insufficient defence for VoIP attacks and insecure compatibility options may allow attackers to hijack enterprise communications. The enterprise users and employees are also the next generation targets for these attackers. They can attack client soft phones and handsets using the broken communication, invalid protocol options and malicious messaging content to compromise sensitive business assets. These attacks may lead to privacy violations, legal issues, call/toll fraud and intelligence collection.
Attack vectors and practical threats against the Microsoft Lync ecosystem will be presented with newly published vulnerabilities and Microsoft Lync testing modules of the Viproy VoIP kit developed by the speaker. This will be accompanied by live demonstrations against a test environment.
• A brief introduction to Microsoft Lync ecosystem
• Security requirements, design vulnerabilities and priorities
• Modern threats against commercial Microsoft Lync services
• Demonstration of new attack vectors against target test platform
This document discusses building a SIP softswitch using Asterisk and Asterisk-Java. It describes using Asterisk to handle SIP signaling, media processing, and interfacing with a Java routing application. The Java application directs call routing and interfaces with Asterisk via FastAGI and AMI. Key issues addressed include having call legs survive independently and supporting early media. Patches are used to enable call bridging and configurable early media handling in app_dial.
The document introduces VoIP (Voice over IP) concepts. It discusses digitization of audio, real-time compression/encoding, transport over UDP, and problems with UDP like packet loss and jitter. It also covers protocols like SIP for signaling, SDP for session description, and RTP for media transport. Key VoIP services that can be implemented with SIP are discussed, like call transfer and voicemail.
1. VoIP phone systems allow businesses to continue operations remotely in the event of a disaster by enabling call forwarding to mobile phones and other locations. This provides business continuity.
2. VoIP solutions can reduce telephony costs by up to 35% compared to traditional phone systems. Entanet's hosted voice packages also include calls within the monthly fee per user, providing predictable monthly costs.
3. VoIP systems can help mitigate telephony fraud risks by using strong passwords, excluding high-risk call destinations by default, and monitoring for fraudulent IP addresses. Daily and monthly account limits also limit potential damage from breaches.
Do you want to use NGN services? Do you have a SIP trunk service? Are you going to connect SIP trunk to your traditional PBX?
In this webinar we'll help you to achieve this.
www.senatelecom.com
Introduction to NFV and its Open ecosystemMalihe Asemani
1st Iran NFV Open Community-2nd IRAN OPNFV Meetup
Main Topics:
- An overview on the impact of Open Source and Cloud on telecommunication networks
- A brief review on NFV, its advantages, related products, and OPNFV project
Operational Challenges and ST’s Proposed Solutions to Improve Collaboration b...Sina Bagherinezhad
Operational Challenges and ST’s Proposed Solutions to Improve Collaboration between IP and R&D in Innovation processes
by Fabrizio Cesaroni & Andrea Piccaluga.
UNIVERSITY OF CALIFORNIA, BERKELEY, VOL. 55, NO. 4, SUMMER 2013, CMR.BERKELEY.EDU
For presentation in Farsi.
Scrum based methodology for distributed software developmentNavid Sedighpour
This presentation is in Farsi
Presented by Me in 24th May 2016 in AmirKabir University of Technology
Navid Sedighpour
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ارائه به زبان فارسی است
چهارم خرداد سال 1395 در دانشگاه صنعتی امیرکبیر
نوید صدیق پور
Internet of Things - Future & Opportunities * اینترنت اشیاء - فرصتهای پیش روMasoud Zamani
Internet of Things - Future & Opportunities
اینترنت اشیاء به شبکهای از اجسام (اشیاء) فیزیکی اطلاق میشود که به کمک قطعات الکترونیکی، سنسورها و نرمافزارهای درون خودشان، با گردآوری و تحلیل دادههای مختلف، میتوانند ارزشی فراتر از کاربری معمول خود را خلق کنند. این ارائه تلاش دارد تا با آشناسازی مخاطبان با اینترنت اشیاء روندها و فرصتهای آتی بازار این حوزه را مشخص سازد.
-----
Videos:
Part 1: http://www.aparat.com/v/gGqhj
Part 2: http://www.aparat.com/v/EGe0f
Part 3: http://www.aparat.com/v/gAF0R
آموزش نرم افزار صنعتی کنترل و مانیتورینگ LabVIEWfaradars
کاربرد نرم افزار Labview زمینه های مختلفی از پروژه های دانشجویی را در بر گیرد. به کمک این آموزش الفبای کار با نرم افزار و نکات مرتبط با آن آموزش داده می شود و می توان در هر یک از کاربرد های تخصصی، از قبیل پردازش سیگنال ها و تصاویر، کنترل سیستم ها، شبکه های کامپیوتری، رباتیک، ریاضیات، برنامه نویسی های سخت افزاری FPGA و …، از ابزارهای توانمند این نرم افزار استفاده نمود.
سرفصل هایی که در این آموزش به آن پرداخته شده است:
- فصل ۱: معرفی نرم افزار Labview
- فصل ۲: مقدمه ای بر ابزار های موجود در نرم افزار
- فصل ۳: مقدمه ای بر انواع داده ها در محیط Labview
- فصل ۴: معرفی مقدماتی محیط برنامه سازی Labview
- فصل ۵: معرفی Structure ها و انواع حلقه های برنامه
- فصل ۶: معرفی آرایه ها و توابع کاربردی آن
- فصل ۷: معرفی بخش Numeric در تولکیت برنامه سازی
- فصل ۸: معرفی بخش Boolean و Comparison در تولکیت برنامه سازی
- فصل ۹: معرفی توابع متنی و کاربرد آن
- فصل ۱۰: دسترسی به فایل در Labview و ایجاد Report
- فصل ۱۱: معرفی تولکیت Mathematics
- فصل ۱۲: مباحث تکمیلی در کاربرد مقدماتی برنامه سازی در Labview
برای توضیحات بیشتر و تهیه این آموزش لطفا به لینک زیر مراجعه بفرمائید:
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در این ارائه درباره چگونه تهیه پروتوتایپ، انواع پروتوتایپ در تجربه کاربری و تفاوت Lo-Fi و Hi-Fi پروتوتایپها صحبت کردم و همچنین چگونه میتوانیم بوسیله پروتوتایپ یک آزمون کاربردپذیری انجام دهیم
بیانیه ماموریت سند تدوینشدهای است که اهداف باثبات و منحصر به فرد سازمان را تعریف میکند: اینکه چرا سازمان وجود دارد، اهداف آن چیست، میخواهد به چه چیزی برسد.
research progect for e commerce course at master level Amirkabir University of Technology - Tehran Polytechnic
-professor mehdi shajari and engineer morteza javan
دانلود مقاله بررسی شبکه های LPWAN در 11 صفحه، مقاله شبکه اینترنت اشیا در نوین قلم ، بررسی دقیق و تحلیل موشکافانه در قالب کاملا حرفه ای.
در مقاله بررسی شبکه های LPWAN چه مطالبی وجود دارد؟
چکیده
مقدمه
پیشینه تحقیق
متدولوژی
بحث و نتیجه گیری
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Matroska is a multimedia container format based on EBML that can contain multiple audio, video, and subtitle streams. It defines elements like Segment, SeekHead, Info, Tracks, Cluster, Cues, Attachments and Tags that provide structure and metadata for playback. Codec Mappings are used to identify and describe the encoding of data within each track. A sample Matroska file is analyzed to demonstrate these elements.
OS Forensics is one of the categories in digital forensics. As MS Windows is the most popular OS in the world, we focus on Windows forensics and some important methods in this presentation.
This document discusses SIP over TLS. It describes how SIP signaling can be secured using TLS instead of UDP or TCP. The TLS handshake process is explained in detail including the messages exchanged between the client and server. It also discusses how media can be encrypted using SRTP and the different key management protocols that can be used like SDES, DTLS, and ZRTP. Sample packet captures of SIP over TLS calls are also provided.
An employee at Desjardins Group, the largest federation of credit unions in North America, exfiltrated personal information of 9.7 million individuals over 26 months from 2017-2019. The employee sold this information to private lenders. A data breach was discovered in May 2019 that compromised names, addresses, social insurance numbers, and transaction histories. Desjardins Group faces lawsuits and has spent $108 million in response, including credit monitoring and compensation. The breach occurred because marketing employees could download personal information from company data warehouses to shared drives.
Metasploit is an open-source penetration testing framework that allows users to find, exploit, and validate vulnerabilities. It was originally developed in 2003 as a Perl-based tool and was later rewritten in Ruby. Metasploit includes both commercial and open-source platforms and provides libraries, modules, and interfaces to aid in penetration testing workflows.
This document discusses various IT certifications and which ones are better suited for different IT roles. It recommends getting CompTIA certifications as they are core certifications for any IT role. It also provides certification roadmaps for roles like security expert, network administration, DevOps, and project management. The document advises focusing on your career and adding some certifications relevant to your role as it is not possible to get all certifications.
This document defines and compares disassemblers, debuggers, and decompilers. It then discusses the IDA Pro tool in more detail. A disassembler translates machine code back to assembly code, enabling static code analysis. A debugger also disassembles code but allows controlled execution and dynamic analysis. A decompiler translates machine code into high-level code. The document recommends IDA Pro as a powerful disassembler and debugger that has become a standard for reverse engineering. It also briefly mentions the open-source x64dbg debugger as an alternative.
Snort is an open-source network intrusion detection and prevention system that performs real-time traffic analysis and packet logging on IP networks. It can detect a variety of attacks through protocol analysis, content searching, and matching. Snort functions in sniffer, packet logger, and intrusion detection modes. As a network intrusion detection system, it monitors network traffic and compares it to a database of attack signatures. Snort rules are used to detect suspicious activity and are organized into categories covering web, SQL, shellcode attacks and more.
This document discusses static and dynamic linking of libraries in Windows. It explains how dynamic linking loads libraries into memory alongside applications rather than copying code into each executable. It then covers dynamic link libraries (DLLs) and how their exported functions can be accessed via name or index number. The document focuses on DLL injection techniques used by malware to manipulate process execution, including loading a malicious DLL via the LoadLibrary and GetProcAddress APIs or modifying registry entries.
This document discusses SQL injection in Java applications. It defines SQL injection as a vulnerability that allows attackers to hijack databases. The document covers different types of SQL injections like boolean-based, union-based, time-based, and error-based injections. It provides examples of SQL injection vulnerabilities in Java code and how to prevent them by using prepared statements with parameterized queries, stored procedures, input validation, escaping user input, enforcing least privilege, and using tools to detect vulnerabilities.
This document discusses techniques for analyzing malware samples without executing them. It covers static analysis methods like identifying the file type and architecture, fingerprinting with hashes, scanning for known signatures, extracting strings, analyzing the PE header, and comparing samples. The goal of static analysis is to learn as much as possible about the malware before executing it, in order to focus subsequent dynamic analysis efforts. Manual and automated tools are described throughout for performing static analysis tasks like string extraction, unpacking obfuscated files, and classifying samples.
Steve Jobs visited Xerox PARC in 1979 and was inspired by the graphical user interface (GUI) he saw, including the mouse. However, he wanted to create something appropriate for mass audiences rather than just reproduce what was seen. Creativity involves generating something new and valuable. Creative leadership combines leadership and creativity to inspire and implement imaginative solutions. Effective creative leaders engage diverse teams, encourage collaboration, provide intellectual challenges to motivate intrinsic motivation, and embrace failures as learning opportunities.
IPsec for IMS provides a concise overview of IPsec (Internet Protocol Security) and how it is used in the IMS (IP Multimedia Subsystem). The document defines IPsec as a set of security protocols that secure IP data at the network layer by providing data confidentiality, integrity, and authentication. It describes the main IPsec components and protocols including IKE (Internet Key Exchange) and ESP (Encapsulating Security Payload). The document then summarizes how IPsec establishes secure tunnels between network devices using IKE phase 1 and phase 2 negotiations. Finally, it outlines how IPsec ESP is used to provide confidentiality for SIP signaling between the UE (User Equipment) and P-CSCF (Proxy-Call
The document provides an overview of eSIM technology:
- eSIM allows the SIM profile to be downloaded wirelessly to an embedded chip rather than using a removable SIM card. This enables easier switching between mobile operators and improved customer experience.
- eSIM provides benefits to mobile operators, SIM suppliers, businesses, and consumers by opening new market opportunities and reducing costs while maintaining security. It allows connectivity management and connected devices/IoT to work more flexibly.
- Key players involved in eSIM include the eUICC chip, subscription managers that generate profiles, and mobile network operators. Remote SIM provisioning specifications define consumer and M2M architectures and elements like profile storage and management.
Sena cloud UC is a solution for customers and also service providers that makes everything they need for their businesses as a service through the cloud. Let's know more about it.
www.senatelecom.com
Telephony System is very important for all businesses today, and they try to keep it on service because of huge Impacts when are hit.
We are going to introduce some solutions for DR planing.
www.senatelecom.com
The document discusses eSIM technology, which allows for a SIM profile to be transferred wirelessly to a device's embedded SIM chip, removing the need for a physical SIM card. An eSIM provides easier switching between mobile providers by allowing remote provisioning of a new SIM profile. Key benefits of eSIM include improved customer experience through remote switching of providers without needing a new physical SIM card.