VoIP (Voice over IP) is a shining noun in the IT industry and telecom industry at this stage, and we can literally know what it is to solve the problem of technology. To put it simply, the basic principle of VoIP is to compress and encode our voice with voice compression devices, then the voice data according to the relevant protocol packaging, through the IP network packets to the destination, and then the
VoIP and data convergence networks are consuming a lot of money from enterprises, but they still have a problem: "Is this network security ?" For Alphonse Edouard, vice president of IT affairs at Dune Capital Management, an investment company, VoIP has become a business foundation. Therefore, it is essential to ensure the security of VoIP.
Edouard said that voice
is a connection-oriented transport layer protocol, the TCP-like traffic control and congestion control algorithms are used to ensure reliable transmission of user data between two SCTP endpoints through self-validation and re-transmission mechanisms. Compared with other transmission protocols such as TCP, SCTP has a low transmission latency, which can avoid the blocking of some big data on other data and provide higher reliability and security. (2) M3UA is a third-level user adaptation layer pr
Media Gateway: it is mainly used to convert voice signals into IP packets.
Media Gateway controller, also known as gate keeper or call server. Responsible for signal transmission and conversion management.
Voice server: mainly provides voice response services when the phone is disconnected, busy, or busy.
Signaling Gateway: it is mainly used to control the call establishment and provide value-added services for related applications during the exchange process.
Classification of Media Gateway (MG
if your application needs to be able to receive messages sent from the server while the device is hibernating, then we can use the VoIP mode to achieve this requirement. But if the application is not a true VoIP app, then when you submit your app to AppStore it will basically be reject by Apple. But if your app is published internally or you just want to know how it works, it might help. first, how to apply
the principle and technology of VoIPVoice communication through the Internet is a very complex system engineering, its application is very wide, so the technology involved is also particularly many, the most fundamental technology is the VoIP (voice over IP) technology, it can be said that the Internet voice communication is one of the most typical VoIP technology, It is also the most promising application
VoIP vulnerabilities have once become a threat to VoIP and its devices, resulting in unavailability or poor call quality. However, a recent finding shows that some types of VoIP attacks can be used to access the data network and steal information.
According to a survey by Sipera VIPER laboratory, portable computers running Vo
With the continuous expansion of data network bandwidth, hundreds of megabytes or even gigabit to the desktop has become possible. The increase of bandwidth also provides a powerful precondition for transmitting voice on the data network. At the same time, VoIP technology is increasingly mature, similar to voice compression, QoS quality assurance, such as the topic has been widely discussed and reached a consensus. It can be said that
It runs as follows: Gullible users receive an e-mail (or a phone call), are told that his credit card information is being stolen, and then let him quickly dial a phone number. This phone will have computer-made voice prompts, let him enter credit card number and other authentication information and so on.
Security Policy for VoIP
Have you ever heard of the latest VoIP fishing trick-vishing's notoriety?
Document directory
ABCs of VoIP
Keeping with Protocol
Private branch exchange
PBX hardware and software
Can you hear me now? Codec compatibility
Application in the real world
Workplace Integration
Best practices
Conclusions
Http://arstechnica.com/business/news/2010/01/a-quick-guide-to-voip-on-the-cheap-with-asterisk.ars/
With the advent of voice-over-IP (
We should all know about VoIP. This low-cost network communication method has always been favored by everyone. As a support for this service, the security of the VoIP protocol is extremely worrying. At present, there are four major security issues facing VoIP: DoS attacks, illegal access, fraudulent calls, eavesdropping, and other threats. However,
Author: OrphousV Tianyang ForumThis time I will show the implementation process of several common attack forms.SIPSession Initiation Protocol (ietf rfc 3261) is a widely used VoIP Protocol. SIP is responsible for creating and disabling multimedia sessions, and VoIP involves multimedia sessions. In a phone conversation, the SIP message exchange method 1 is shown.Figure 1First, the User Agent (User Agent), th
At present, most enterprises in China have already connected to the data network and started to carry out various services, such as office systems, on the network, how to enable your data network to bring more benefits to enterprises is already a very realistic problem for enterprises. On the one hand, we consider using the data network to improve production efficiency, on the one hand, it is highly cost-effective to consider cost savings through data networks, especially for those enterprises w
From the security point of view, VoIP is ineffective, and it has both network and voice network weaknesses. However, the security challenges faced by VoIP are not unsolvable. All we need is a complete security plan.
Step 1: three major security threats of VoIP are authentication failure, integrity failure, and privacy protection failure. When implementing
1 Introduction
At present, the telecom operation mode is facing a huge change. The traditional telecom business is undergoing profound changes in terms of concepts, technologies, businesses, investment, management and services. The new communication mode will be unified to the IP address. The VoIP (Voice over IP) uses the speech compression encoding technology, the grouping real-time transmission technology and the Control Protocol (RTP/RTCP) the tech
Many enterprises are considering migrating to VoIP. Network administrators have many considerations. The SearchVoIP.com website interviewed Doug Hyde, product line manager of the stack switch of 3Com, about some tips on mitigating this transition and ensuring that the network is ready for VoIP.
Q: How can enterprises ensure the service quality of existing networks?
Doug Hyde: an important aspect of ensuring
Absrtact: In recent years, with the development of technology VoIP gradually replaces the traditional long-distance business of the corresponding demand for VoIP business monitoring is also applied.
At present, more equipment is often through the router firewall and other modified but to meet the OC192 wire speed requirements of the equipment is often very high for the entire network of comprehensive monit
on mobile voice services, however, the performance evaluation results of traditional MANET for VOIP services are always unsatisfactory. Here, people are very concerned about whether the wireless mesh network can meet the quality requirements of users for real-time voice services.
Iometrix, a professional testing company, conducted the first performance evaluation and testing of Wireless Mesh Networks Based on the draft study by the IEEE 802.11 Workin
1 IntroductionIn recent years, with the wide application of the IP network technology, more and more researchers are paying attention to the service quality issues that the IP network can provide, scientific and reliable measurement and evaluation of service quality is a critical issue in Network Measurement and network planning and design. As a pioneer in the Next Generation aggregation Service Network Based on packet transmission, VoIP will provide
The combination of communication services and IP networks, especially the Internet, is a natural process that continues to develop along with the generation of e-Mail and instant messages. VoIP-transmitting voice over packet-switched IP networks-is one of the most important trends in the telecom field. The rapid development of VoIP networks has two important factors: the transformation from traditional tele
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