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H.323
34,00 € *
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High Quality Content by WIKIPEDIA articles! H.323 is an umbrella Recommendation from the ITU Telecommunication Standardization Sector (ITU-T) that defines the protocols to provide audio-visual communication sessions on any packet network. The H.323 standard addresses call signaling and control, multimedia transport and control, and bandwidth control for point-to-point and multi-point conferences. It is widely implemented by voice and videoconferencing equipment manufacturers, is used within various Internet real-time applications such as GnuGK and NetMeeting and is widely deployed worldwide by service providers and enterprises for both voice and video services over Internet Protocol (IP) networks. It is a part of the ITU-T H.32x series of protocols, which also address multimedia communications over Integrated Services Digital Network (ISDN), Public Switched Telephone Network (PSTN) or Signaling System 7 (SS7), and 3G mobile networks. H.323 Call Signaling is based on the ITU-T Recommendation Q.931 protocol and is suited for transmitting calls across networks using a mixture of IP, PSTN, ISDN, and QSIG over ISDN.

Anbieter: Dodax
Stand: 23.01.2020
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Voice Frequency
35,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is used for the transmission of speech. In telephony, the usable voice frequency band ranges from approximately 300 Hz to 3400 Hz. It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency (despite the fact that this is electromagnetic energy, not acoustic energy). The bandwidth allocated for a single voice-frequency transmission channel is usually 4 kHz, including guard bands, allowing a sampling rate of 8 kHz to be used as the basis of the pulse code modulation system used for the digital PSTN.

Anbieter: Dodax AT
Stand: 23.01.2020
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Voice Frequency
34,00 € *
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. A voice frequency (VF) or voice band is one of the frequencies, within part of the audio range, that is used for the transmission of speech. In telephony, the usable voice frequency band ranges from approximately 300 Hz to 3400 Hz. It is for this reason that the ultra low frequency band of the electromagnetic spectrum between 300 and 3000 Hz is also referred to as voice frequency (despite the fact that this is electromagnetic energy, not acoustic energy). The bandwidth allocated for a single voice-frequency transmission channel is usually 4 kHz, including guard bands, allowing a sampling rate of 8 kHz to be used as the basis of the pulse code modulation system used for the digital PSTN.

Anbieter: Dodax
Stand: 23.01.2020
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Cisco IP Telephony (CIPT) (Authorized Self-Stud...
23,95 € *
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Foundation Learning for CCVP IP Telephony Jeremy Cioara, CCIE® No. 11,727 Cisco IP Telephony (CIPT), Second Edition, is a Cisco®-authorized, self-paced learning tool for CCVP IP telephony foundation learning. This book provides you with the knowledge needed to install, configure, and maintain a Cisco IP telephony solution. By reading this book, you will gain a thorough understanding of Cisco Unified CallManager version 4.1, the call routing and signaling component for the Cisco IP telephony solution. Cisco IP Telephony (CIPT) expands your knowledge of voice over IP (VoIP) and public switched telephone network (PSTN) components and technologies. This book teaches you how to describe, install, configure, and support Cisco Unified CallManager 4.1 in a Cisco network including such features as security and video; how to configure gateways, gatekeepers, and switches; and how to build route plans to place intra- and intercluster Cisco IP phone calls. Chapter review questions, detailed configuration examples, network diagrams, and thorough explanations help reinforce learning. Whether you are preparing for CCVP certification or simply want to gain a better understanding of IP telephony and Cisco Unified CallManager, you will benefit from the foundation information presented in this book. Cisco IP Telephony (CIPT), Second Edition, is part of a recommended learning path from Cisco Systems® that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining. Jeremy D. Cioara, CCIE® No. 11,727, is the owner of AdTEC Networks and works as a network consultant, instructor, and author. He has been working in network technologies for more than a decade and has deployed networks worldwide. His current consulting work focuses on network and VoIP implementations. Examine design strategies behind a Cisco Unified CallManager cluster, cluster replication, and Cisco Unified CallManager deployment models Perform Cisco Unified CallManager server installations and upgrades Learn the features of all Cisco IP Phones, the IP phone startup process, and audio codec communication Add IP phone users and apply bulk moves, adds, and changes Configure Cisco gateways and trunks Design and configure Cisco Unified CallManager route plans Implement telephony call restrictions and control Effectively coordinate multisite deploymentsConfigure user features, Cisco Unified CallManager Attendant, and Cisco IP Manager Assistant Secure the Windows operating system and Cisco Unified CallManager administration Prevent toll fraud and harden the IP phone against attack Configure Cisco Unified CallManager to support video Monitor performance and configure alarms, traces, and CAR This volume is in the Certification Self-Study Series offered by Cisco Press®. Books in this series provide officially developed self-study solutions to help networking professionals understand technology implementations and prepare for the Cisco Career Certifications examinations. Category: IP Communications Covers: Cisco Unified CallManager v4.1

Anbieter: buecher
Stand: 23.01.2020
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Cisco IP Telephony (CIPT) (Authorized Self-Stud...
23,95 € *
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Foundation Learning for CCVP IP Telephony Jeremy Cioara, CCIE® No. 11,727 Cisco IP Telephony (CIPT), Second Edition, is a Cisco®-authorized, self-paced learning tool for CCVP IP telephony foundation learning. This book provides you with the knowledge needed to install, configure, and maintain a Cisco IP telephony solution. By reading this book, you will gain a thorough understanding of Cisco Unified CallManager version 4.1, the call routing and signaling component for the Cisco IP telephony solution. Cisco IP Telephony (CIPT) expands your knowledge of voice over IP (VoIP) and public switched telephone network (PSTN) components and technologies. This book teaches you how to describe, install, configure, and support Cisco Unified CallManager 4.1 in a Cisco network including such features as security and video; how to configure gateways, gatekeepers, and switches; and how to build route plans to place intra- and intercluster Cisco IP phone calls. Chapter review questions, detailed configuration examples, network diagrams, and thorough explanations help reinforce learning. Whether you are preparing for CCVP certification or simply want to gain a better understanding of IP telephony and Cisco Unified CallManager, you will benefit from the foundation information presented in this book. Cisco IP Telephony (CIPT), Second Edition, is part of a recommended learning path from Cisco Systems® that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press. To find out more about instructor-led training, e-learning, and hands-on instruction offered by authorized Cisco Learning Partners worldwide, please visit www.cisco.com/go/authorizedtraining. Jeremy D. Cioara, CCIE® No. 11,727, is the owner of AdTEC Networks and works as a network consultant, instructor, and author. He has been working in network technologies for more than a decade and has deployed networks worldwide. His current consulting work focuses on network and VoIP implementations. Examine design strategies behind a Cisco Unified CallManager cluster, cluster replication, and Cisco Unified CallManager deployment models Perform Cisco Unified CallManager server installations and upgrades Learn the features of all Cisco IP Phones, the IP phone startup process, and audio codec communication Add IP phone users and apply bulk moves, adds, and changes Configure Cisco gateways and trunks Design and configure Cisco Unified CallManager route plans Implement telephony call restrictions and control Effectively coordinate multisite deploymentsConfigure user features, Cisco Unified CallManager Attendant, and Cisco IP Manager Assistant Secure the Windows operating system and Cisco Unified CallManager administration Prevent toll fraud and harden the IP phone against attack Configure Cisco Unified CallManager to support video Monitor performance and configure alarms, traces, and CAR This volume is in the Certification Self-Study Series offered by Cisco Press®. Books in this series provide officially developed self-study solutions to help networking professionals understand technology implementations and prepare for the Cisco Career Certifications examinations. Category: IP Communications Covers: Cisco Unified CallManager v4.1

Anbieter: buecher
Stand: 23.01.2020
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Wireless Local Loops: Theory and Applications
362,00 CHF *
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The demand for greater flexibility both in bandwidth allocation as well as in geographical terms has opened up the new application area of Wireless Local Loops (WLL). WLL provide a telephone system where subscribers are connected to the Public Switches Telephone Network (PSTN) using radio signals rather than copper wire for part or all of the connection between the subscriber and the switch. Divided into two parts, theoretical aspects and applications, Wireless Local Loops brings together contributions from leading world experts in this increasingly important section of wireless communication systems. - Covers all aspects of WLL from design to implementation. - Explains the theoretical aspects of WLL including areas such as propagation, modulation, coding, channel modelling and also traffic engineering issues. - Presents the applications areas of WLL including interference, prototype designs of various access protocols, a mobility manager, a remote management systems and the provision of multimedia services. By providing a self-contained treatment of the progressively important area Wireless Local Loops will have immense appeal to practising engineers, researchers and graduate students needing to understand the bakground to WLL and its major role in the provision of new services.

Anbieter: Orell Fuessli CH
Stand: 23.01.2020
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Digital Signal Transmission
77,90 CHF *
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This textbook will provide both undergraduates and practising engineers with an up-to-date and thorough grounding in the concepts of modern digital transmission. The book is not encyclopaedic, rather it selects the key concepts and processes and explains them in a deliberate pedagogic style. These concepts and processes are then illustrated by a number of system descriptions. The book is divided into three parts. The longest, Part II, describes the basic processes of digital transmission, such as matched filter detection, pulse shaping, line coding, channel coding, error detection and correction, etc. Understanding the concepts behind these processes requires a grasp of basic mathematical models, and this is provided in Part I. Finally, to put the processes in context, Part III describes elements of the public switched telephone network. The text is written throughout in a modern, digital context, and is comprehensively illustrated with helpful figures. Although the mathematical models (time- and frequency-domain concepts) have wider relevance, they are developed specifically for modelling digital signals. The processes described are those found in current transmission systems, and the description of the PSTN includes an outline of newly formulated standards for the synchronous digital hierarchy (SDH), SONET and for broadband ISDN (ATM). The book will be of great value to 2nd and 3rd year undergraduates studying telecommunications, as well as to graduate trainees and practising engineers. It is appropriate for either private study or as a text associated with a taught telecommunications course. The many worked examples and exercises with solutions will be particularly helpful.

Anbieter: Orell Fuessli CH
Stand: 23.01.2020
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Digital Signal Transmission
69,90 CHF *
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This textbook will provide both undergraduates and practising engineers with an up-to-date and thorough grounding in the concepts of modern digital transmission. The book is not encyclopaedic, rather it selects the key concepts and processes and explains them in a deliberate pedagogic style. These concepts and processes are then illustrated by a number of system descriptions. The book is divided into three parts. The longest, Part II, describes the basic processes of digital transmission, such as matched filter detection, pulse shaping, line coding, channel coding, error detection and correction, etc. Understanding the concepts behind these processes requires a grasp of basic mathematical models, and this is provided in Part I. Finally, to put the processes in context, Part III describes elements of the public switched telephone network. The text is written throughout in a modern, digital context, and is comprehensively illustrated with helpful figures. Although the mathematical models (time- and frequency-domain concepts) have wider relevance, they are developed specifically for modelling digital signals. The processes described are those found in current transmission systems, and the description of the PSTN includes an outline of newly formulated standards for the synchronous digital hierarchy (SDH), SONET and for broadband ISDN (ATM). The book will be of great value to 2nd and 3rd year undergraduates studying telecommunications, as well as to graduate trainees and practising engineers. It is appropriate for either private study or as a text associated with a taught telecommunications course. The many worked examples and exercises with solutions will be particularly helpful.

Anbieter: Orell Fuessli CH
Stand: 23.01.2020
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Voice over IP Fundamentals
34,90 CHF *
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A systematic approach to understanding the basics of Voice over IP Understand the basics of PSTN services and IP signaling protocols, including SS7 Learn how VoIP can run the same applications as the existing telephony system, but in a more cost-efficient and scalable manner Delve into such VoIP topics as jitter, latency, packet loss, codecs, quality of service tools, and mean opinion scores Learn about the functional components involved in using Cisco gateways to deploy VoIP networks Voice over IP (VoIP), which integrates voice and data transmission, is quickly becoming an important factor in network communications. It promises lower operational costs, greater flexibility, and a variety of enhanced applications. Voice over IP Fundamentals provides a thorough introduction to this new technology to help experts in both the data and telephone industries plan for the new networks. You will learn how the telephony infrastructure was built and how it works today, the major concepts concerning voice and data networking, transmission of voice over data, and IP signaling protocols used to interwork with current telephony systems. The authors cover various benefits and applications of VoIP and how to ensure good voice quality in your network. This book is part of the Networking Technology Series from Cisco Press, which offers networking professionals valuable information for constructing efficient networks, understanding new technologies, and building successful careers.

Anbieter: Orell Fuessli CH
Stand: 23.01.2020
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