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Wideband Tdd: Wcdma for the Unpaired Spectrum
206,35 € *
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3rd generation radio systems will be increasingly developed, deployed and operated in the years to come. TDD is one of two main approaches to implementing these 3G systems, so that there will be an increasing need for the engineering community to learn quickly and comprehensively about the TDD technology. As 3G systems become popular, the topics will no doubt be introduced to academic curricula and will also provide a basis for future research. This book provides comprehensive coverage of TDD. It is essentially a Radio Access Network technology and the book embraces the structure of the radio interface as well as the user equipment and network equipment. In addition, Wideband TDD also covers the connection of the TDD Radio Access Network to the 3G Core Network and public switched networks (PSTN) as well as public and private packet networks (Internet and Intranet). Services, applications and performance are also addressed. Finally, TDD is compared with other radio access technologies, namely FDD, TD-SCDMA and WLAN. TD-SCDMA is the Narrowband version of TDD in 3G, and WLAN standards address wireless computer communications. Although there are a number of books published on 3G and UMTS, most of the focus of these books has been on FDD component of 3G. Wideband TDD: * Describes all aspects of TDD in a single comprehensive manner * Addresses TDD technology, TDD systems and the TDD market place * Discusses deployment scenarios and Radio Resource Management for TDD * Provides a comparison of TDD with other radio access technologies, namely FDD, TD-SCDMA and wireless LANs This will prove an essential addition to the bookshelf of professional communication and software engineers, development engineers, technical marketing professionals, researchers in industry, wireless equipment vendors such as Siemens, Nokia and InterDigital, operators and service providers. It will also provide a comprehensive overview of TDD for postgraduates who are taking advanced courses in Mobile Wireless communications.

Anbieter: buecher
Stand: 08.08.2020
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Building Telephony Systems with OpenSIPS 1.6 (e...
20,70 € *
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In DetailSIP is the most important VoIP protocol and OpenSIPS is clearly the open source leader in VoIP platforms based on pure SIP. The whole telecommunication industry is changing to an IP environment, and telephony in the way we know today will disappear in less than ten years. SIP is the protocol leading this disruptive revolution and it is one of the main protocols on next-generation networks. While a VoIP provider is not the only kind of SIP infrastructure created using OpenSIPS, it is certainly one of the most difficult to implement.This book will give you a competitive edge by helping you to create a SIP infrastructure capable of handling tens of thousands of subscribers. You can extend the examples given in this book easily to other applications such as a SIP router, load balancing, IP PBX, and Hosted PBX as well. This book is an update of the title Building Telephony Systems with OpenSER.The book starts with the simplest configuration and evolves chapter by chapter teaching you how to add new features and modules. It will first teach you the basic concepts of SIP and SIP routing. Then, you will start applying the theory by installing OpenSIPS and creating the configuration file. You will learn about features such as authentication, PSTN connectivity, user portals, media server integration, billing, NAT traversal, and monitoring. The book uses a fictional VoIP provider to explain OpenSIPS. The idea is to have a simple but complete running VoIP provider by the end of the book.A practical guide to building an efficient SIP telephony systemApproachThis is a practical, hands-on book based around a fictitious case study VoIP Provider that you will build on a development server using OpenSIPS 1.6. The case study grows chapter by chapter, from installing your local development server, right up to the finished VoIP provider.Who this book is forThis book is for readers who want to understand how to build a SIP provider from scratch using OpenSIPS. It is suitable for VoIP providers, large enterprises, and universities.Telephony and Linux experience will be helpful but is not essential. Readers need not have prior knowledge of OpenSIPS. This book will also help readers who were using OpenSER but are now confused with the new OpenSIPS.

Anbieter: buecher
Stand: 08.08.2020
Zum Angebot
Building Telephony Systems with OpenSIPS 1.6 (e...
20,70 € *
ggf. zzgl. Versand

In DetailSIP is the most important VoIP protocol and OpenSIPS is clearly the open source leader in VoIP platforms based on pure SIP. The whole telecommunication industry is changing to an IP environment, and telephony in the way we know today will disappear in less than ten years. SIP is the protocol leading this disruptive revolution and it is one of the main protocols on next-generation networks. While a VoIP provider is not the only kind of SIP infrastructure created using OpenSIPS, it is certainly one of the most difficult to implement.This book will give you a competitive edge by helping you to create a SIP infrastructure capable of handling tens of thousands of subscribers. You can extend the examples given in this book easily to other applications such as a SIP router, load balancing, IP PBX, and Hosted PBX as well. This book is an update of the title Building Telephony Systems with OpenSER.The book starts with the simplest configuration and evolves chapter by chapter teaching you how to add new features and modules. It will first teach you the basic concepts of SIP and SIP routing. Then, you will start applying the theory by installing OpenSIPS and creating the configuration file. You will learn about features such as authentication, PSTN connectivity, user portals, media server integration, billing, NAT traversal, and monitoring. The book uses a fictional VoIP provider to explain OpenSIPS. The idea is to have a simple but complete running VoIP provider by the end of the book.A practical guide to building an efficient SIP telephony systemApproachThis is a practical, hands-on book based around a fictitious case study VoIP Provider that you will build on a development server using OpenSIPS 1.6. The case study grows chapter by chapter, from installing your local development server, right up to the finished VoIP provider.Who this book is forThis book is for readers who want to understand how to build a SIP provider from scratch using OpenSIPS. It is suitable for VoIP providers, large enterprises, and universities.Telephony and Linux experience will be helpful but is not essential. Readers need not have prior knowledge of OpenSIPS. This book will also help readers who were using OpenSER but are now confused with the new OpenSIPS.

Anbieter: buecher
Stand: 08.08.2020
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VoIP User
29,00 € *
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High Quality Content by WIKIPEDIA articles! VoIP User is a community driven and financed SIP based VoIP network. The projects aim is to introduce people to the concept of VoIP by allowing members to experiment with SIP and IAX2 devices.The VoIP User network was designed to operate within a community environment and therefore differs substantially from most other VoIP networks. The main highlighted difference being that users can call PSTN phone numbers through VoIP User's PSTN gateway without incurring any call charges. The way that VoIP User is funded is noteworthy: Calls into VoIP User?s numbers generate a small amount of per minute revenue (the ?termination charge?), and this money goes into a community account or ?pot?.

Anbieter: Dodax
Stand: 08.08.2020
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PSTN-IP Telephony Gateway for Ensuring QoS in H...
39,90 € *
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The appearance of VoIP technology has now made feasible the use of data network for data, as well as voice communication. In this book, the protocol conversion between two different networks, packet scheduling and routing schemes for gateway selection has been introduced and also verified with Asterisk server. The recent trend for convergence of different access network technologies, market deregulation and emergence of dual-mode end-user devices allow the same destination to be reached by alternative paths and interfaces.Providing a good QoS in heterogeneous networks for irregular traffic flows remains a significant challenge. One of the difficult tasks is that of gateway location, also known as gateway selection, path selection, gateway discovery, and gateway routing. The main objective of this book is to design and develop a PSTN-IP Telephony Gateway (PITG) model and to assist routing packets while ensuring minimal call blocking probability with respect to call arrival rate or load, to increase the overall performance of the system. Specifically, the primary focus is on the development, analysis and optimization of the PITG model and evaluation of a gateway selection algorithm.

Anbieter: Dodax
Stand: 08.08.2020
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Voice Browser
34,00 € *
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High Quality Content by WIKIPEDIA articles! A voice browser is a web browser that presents an interactive voice user interface to the user. In addition, it typically provides an interface to the PSTN or a PBX. Just as a visual web browser works with HTML pages, a voice browser operates on pages that specify voice dialogues. Typically these pages are written in VoiceXML, the W3C's standard voice dialog markup language, but other proprietary voice dialogue languages remain in use. A voice browser presents information aurally, using pre-recorded audio file playback or using text-to-speech software to render textual information as audio. A voice browser obtains information using speech recognition and keypad entry (e.g., DTMF detection).

Anbieter: Dodax
Stand: 08.08.2020
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Plain Old Telephone Service
39,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Plain old telephone service (POTS) is the voice-grade telephone service that remains the basic form of residential and small business service connection to the telephone network in many parts of the world.The name is a retronym, and is a reflection of the telephone service still available after the advent of more advanced forms of telephony such as ISDN, mobile phones and VoIP. POTS has been available almost since the introduction of the public telephone system in the late 19th century, in a form mostly unchanged to the normal user despite the introduction of Touch-Tone dialing, electronic telephone exchanges and fiber-optic communication into the public switched telephone network (PSTN).

Anbieter: Dodax
Stand: 08.08.2020
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The 3G IP Multimedia Subsystem (IMS)
85,00 CHF *
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The 3G IP Multimedia Subsystem (IMS): Merging the Internet andthe Cellular Worlds, Second Edition is an updated version ofthe best-selling guide to this exciting technology that will mergethe Internet with the cellular world, ensuring the availability ofInternet technologies such as the web, email, instant messaging,presence and videoconferencing nearly everywhere. In thisthoroughly revised overview of the IMS and its technologies, goals,history, vision, the organizations involved in its standardizationand architecture, the authors first describe how each technologyworks on the Internet and then explain how the same technology isadapted to work in the IMS, enabling readers to take advantage ofany current and future Internet service. Key features of the Second Edition include: * New chapter on Next Generation Networks, including an overviewon standardization, the architecture, and PSTN/ISDN simulationservices. * Fully updated chapter on the Push-to-talk over Cellular (PoC)service, covering the standardization in the Open Mobile Alliance(OMA), architecture, PoC session types, user plane, and the TalkBurst Control Protocol. * Several expanded sections, including discussion of the role ofthe Open Mobile Alliance in the standardization process, IPv4support in IMS, a description of the IMS Application Layer Gatewayand the Transition Gateway, and a description of the presence datamodel. * Updated material on the presence service, session-based instantmessages with the Message Session Relay Protocol (MSRP), and theXML Configuration Access Protocol (XCAP). * Supported by a companion website on which instructors andlecturers can find electronic versions of the figures. Engineers, programmers, business managers, marketingrepresentatives, and technically aware users will all find this tobe an indispensable guide to IMS and the business model behindit.

Anbieter: Orell Fuessli CH
Stand: 08.08.2020
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Wireless Internet and Mobile Computing
80,00 CHF *
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This book describes the technologies involved in all aspects of a large networking system and how the various devices can interact and communicate with each other. Using a bottom up approach the authors demonstrate how it is feasible, for instance, for a cellular device user to communicate, via the all-purpose TCP/IP protocols, with a wireless notebook computer user, traversing all the way through a base station in a cellular wireless network (e.g., GSM, CDMA), a public switched network (PSTN), the Internet, an intranet, a local area network (LAN), and a wireless LAN access point. The information bits, in travelling through this long path, are processed by numerous disparate communication technologies. The authors also describe the technologies involved in infrastructure less wireless networks.

Anbieter: Orell Fuessli CH
Stand: 08.08.2020
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