VOICE OVER IP FIRST-STEP PDF
Voice over IP First-Step. Home · Voice IP Telephony - Deploying Voice-over-IP Protocols Voice over IP Networks: Quality of Service, Pricing and Security. Voice over IP First-Step is anyone's introduction to the world of VoIP home user interested in how VoIP can reduce your monthly phone bill. Your first step into the world of IP telephony No IP telephony experience required Includes clear and easily understood explanations Makes.
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Read Online and Download Ebook. VOICE OVER IP FIRST-STEP. DOWNLOAD EBOOK: VOICE OVER IP FIRST-STEP PDF. Your first step into the world of IP telephony. No IP telephony experience required ; Includes clear and easily understood explanations; Makes learning easy. VoIP technology is a big step toward a world where information The first voice transmission, sent by Alexander Graham Bell, was accomplished in
If you want to develop a simple software-based VoIP telephone, an autodialer program or a call recorder application, it is evident that you need a phone. In the following section I will introduce briefly how to create a softphone using C. All parts of the explanation below can be followed in the code snippet that has been inserted under the textual section.
For building a softphone First of all, you will need some using lines. After this, you need to create a softphone object and a phoneline object by using the ISoftPhone and the IPhoneLine interfaces.
Then you need to specify the SIP account to be used for the phone line you can find detailed explanation about this process in lines — the commented parts will help to understand. After finishing the SIP account specification, you need to define the PBX which the softphone will be registered to see line In most cases it is needed to be able to communicate through firewalls. Line 43 shows how you can implement it. Now you need to configure the previously created phoneLine object to be able to communicate and to register to the PBX see lines When the application is running, the state of the phone line state can change.
For following these changes, you need to listen to its change event.
Free Download Voice over IP First-Step Kevin Wallace
The last step of this task is calling the RegisterPhoneLine method to register the phone line to the softphone. Todd's career spans more than nineteen years in the computer and communications industry, including an initial stint in the US Army as a tech controller at a fixed communications station near Washington DC.
His background includes telecommunications, voice systems, and data communications management and design; large scale server and infrastructure deployment projects; administration and management with various directories and messaging systems. He has also been heavily engaged in various other design and deployment activities.
Todd and his wife have three kids and they live in a small town located on the Kitsap Peninsula on the western side of Puget Sound in the state of Washington. Todd attended Northern Kentucky University and has also held various technical certifications.
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View Larger Image. Part of the First-Step series. However, as time seems to have proven, the technology was not mature enough to meet such expectations at that moment. There has been a clear gulf between the marketing hype and the technological reality of what VoIP really is and what it can offer Swale, In this sense, there is a certain unanimity when considering that a few critical technical issues have prevented large-scale deployment of VoIP services. Nevertheless, it is true that technical shortages have stopped any decisive commitments on VoIP by the operators, a fact that, in a virtuous circle, would have resolved a greater part of these shortages.
As a consequence, the advertising and marketing efforts required for making users massively aware of the possible benefits a range of new VoIP-based services could bring on were not carried out. These determining factors shifted VoIP away from the foreground, since it was unable to meet even a part of those visionary predictions.
However, in the almost ten years it has been behind the scenes, VoIP has continued its technical and commercial progress quietly, although with greater strength. During this period, most of the technical problems related to VoIP have been solved. In this context, its current commercial presence is no longer limited to restricted market niches and it holds a more than interesting position in certain business enterprises or geographical areas3.
In some cases, the expectations seem to continue to go beyond reality: in the United States, despite the value of a VoIP company, 8x8, Inc. However, in China, by the end of , VoIP toll telephone traffic had surpassed traditional toll telephone traffic in both domestic long-distance and international call areas, including phone calls to and from Hong Kong, Macao, and Taiwan Wang and Hu, Also, in February , the estimates reflect around 4.
Therefore, the question arises of what VoIP requires to definitively conquer the mass-market and, as a first step of its evolution, substitute traditional telephony.
The following section analyses this replacement and subsequently examines the possible regulatory alternatives. However, there are many IP-based data networks deployed that are not directly connected to the public Internet and thus are not a part of the true Internet per se.
We are referring to, for example, managed networks and private intranets; these types of data networks even include those found embedded within the operation of existing public telephone networks.
This fact brings on implications on several aspects of the telephone service, such as, for example, the service implementation architecture, the standardization process, and the service provisioning business model. In this sense, both the European Commission and some National Regulatory Authorities have followed 5 similar classifications in view of a possible regulatory treatment of these services4.
Last, how voice and data are processed and combined is the key factor in any VoIP provisioning model, since it conditions the applications that can be provided to the users. In any case, and to sum up, we must start getting used to thinking about VoIP as an interactive real time application, probably deployed over a broadband connection.
Thus, it is in this broader sense that VoIP shall be considered in the following sections. VoIP as a substitute on the demand side The substitution in the consumption of a specific product or service occurs when a replacing product satisfies to a similar extent the requirements covered by the former one and the consumers receive a benefit if they choose to change lower price, greater quality, satisfaction due to following the latest trend….
We must underline that the price is not the only reason and in many cases, it is not even the most important one determining the choice of the consumers. At the moment, the fact that one could receive an unclear voice signal or find the line busy or silent just after picking up the phone does not belong to the common feeling of telephone users.
McPhillips already stated that the next generation of users attracted to lower prices will only show real interest in the technology when it becomes as convenient to use as PSTN telephony. In other words, if VoIP wants to conquer greater portions of the market and generally replace traditional telephony, it must offer users a service with characteristics that are similar to those of the conventional one or, alternately, with additional benefits that are attractive enough to make up for the absence of some of the characteristics they are used to.
In this sense, there are both, technical and regulatory issues, which should be addressed. It is obvious that one of the characteristics of conventional telephony most appreciated by users is the possibility of calling anyone anywhere in the world. The conditions that could be established for this interconnection and access to the necessary infrastructures is, thus, the first of the problems the regulation must answer to, and one we will deal with in the following section.
As a consequence, this is the second issue to be analysed by policy- makers. The remaining questions, that is, basically, safety and quality of service, have taken up the research efforts of these past years and may be resolved to an acceptable degree6, although, for example, Swale identifies a number of fundamental technical challenges that are still to be solved within the industry7.
In any case, these matters could require a regulatory follow-up and the appropriate actions should any significant parameters be breached , although no specific a priori decisions and actions seem to be necessary.
VoIP as a substitute on the offer side The replacement of or between production factors rises when the suppliers of a good or service manage to produce it at a lower cost by making such a replacement.
In the case of end products, a company can voluntarily modify their product portfolio, should they believe that a new design would increase their benefits or allow them to conquer new market areas. Likewise, they may be forced to change should the innovations introduced by their competition cut back their sales or income. The introduction of IP in telephone service implementation is a strategy that telephone companies may adopt to improve efficiency in existing telephone networks8.
The ubiquity of IP networks in enterprises is ensuring a large addressable market for VoIP equipment as well as facilitating the integration of VoIP equipment into existing networks. For operators lacking infrastructures, the incentives make this an easy decision: VoIP telephone services provide an excellent opportunity for ISPs to earn higher profits, especially those ISPs new to the telecommunications market.
With an investment in interconnection elements gateways, network intelligence which would be relatively modest as compared to those traditionally necessary to participate in the telephony market, it would be possible to provide innovative services to the users. With these conditions, it would be natural to expect many agents being interested in providing VoIP services.
However, for the puzzle to show such a clear image a central piece is missing. Any manoeuvre by these companies depends on them being able to use the infrastructures of other operators.
And, what would the approach of operators with their own infrastructures be? In the short term, the result could be the opposite, even if these operators did not enter the IP world.
Taking the Chinese case, paradigmatic due to the considerable progress of VoIP experienced there, Wang and Hu state that, despite VoIP has made inroads into the toll telephone service market, the growth of VoIP services has actually increased profits for 8 The cost of a packet switched network for VoIP could be as much as half of that of a traditional circuit- switched network such as the PSTN for voice transmission Zeadally et al, In fact, from to , both domestic and international calls more than doubled within this three-year period.
Since most VoIP toll telephone traffic must use the local telephone networks, the increase in VoIP services has originated an increase in local telephone network usage as well. However, these operators have not stood still neither will they do so in the future , but quite the opposite.
The competition represented by operators with alternative infrastructures i. Therefore, it is obvious that these companies cannot trust the traditional voice business to continue to represent their basic source of income in the future. They cannot trust this and, as a matter of fact, they are not doing so. Traditional fixed telephony operators have already started the process of reorienting their business towards broadband services.
In particular, possible subsidies from existing fixed infrastructures to these new ones. To this regard, the issue of regulating the interconnection returns as a key element. It is also necessary to underline that VoIP is interesting for any company with its own infrastructures, both for fixed copper pair operators and for cable, mobile communications or any other operator.
In the competition scenario that will be configured in the near future around mobility and broadband as the bases for the services and applications which will be interesting for the user, VoIP allows providing innovative and integrating solutions that resolve in part the shortages of its current offerings. Last, from the regulatory perspective, VoIP development for both types of operator is highly conditioned by the obligations that could be imposed on them.
The degree of possible obligations could range between those that currently rule over the operators with a telephone service available to the public universal service, emergency services, communication 10 interception and those virtually inexistent ones resulting from considering VoIP as a data service.
However, some attempts were brewed during the period representing the culmination of the liberalisation process of the telecommunications sector.Calculating Erlangs Step 2: Two kinds of service providers are operating in this space: one set is focused on VoIP for medium to large enterprises, while another is targeting the small-to-medium business SMB market.
Join Sign In. You can even record your conversations. These are typically designed in the style of traditional digital business telephones. With the release of 4G data, there is a potential for corporate users based outside of populated areas to switch their internet connection to 4G data, which is comparatively as fast as a regular superfast broadband connection.
It is necessary only to encrypt and authenticate the existing data stream. Even in this case, scenario 2 would be a provisional solution, applicable until the voice communications business model was renewed or some VoIP operator 15 reached a SMP situation, thus guaranteeing that the basic rights of the users would in no case be infringed.
The standard is considered of critical importance for delay-sensitive applications, such as voice over wireless IP. A specific requirement mandating the use of lP-based technology in ATM is already in force.