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Produkte zum Begriff Telephony:
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Troubleshooting Cisco IP Telephony
Reveals the methodology you need to resolve complex problems in an IP telephony network Master troubleshooting techniques and methodologies for all parts of a Cisco IP Telephony solution-Cisco CallManager, IP phones, gateways, applications, and more Learn how to investigate and resolve voice quality problems, including delayed audio, choppy or garbled audio, static and noise, one-way or no-way audio, and echo Read about the variety of trouble-shooting tools at your disposal and how and when to use them based on the problem type Discover the potential causes of common problems and how to efficiently troubleshoot them to resolution Learn how to identify and resolve gateway problems by breaking the components into logical groups and following a methodical troubleshooting approach Use best practices recommendations to build a stronger IP telephony deployment and avoid common mistakes IP telephony represents the future of telecommunications: a converged data and voice infrastructure boasting greater flexibility and more cost-effective scalability than traditional telephony. The ability to troubleshoot an IP telephony environment and the underlying network infrastructure is vitally important, just as it is in any complex system. Troubleshooting Cisco IP Telephony teaches the troubleshooting skills necessary to identify and resolve problems in an IP telephony solution. This book provides comprehensive coverage of all parts of a Cisco IP Telephony (CIPT) solution, including CallManager, IP phones, gateways, analog devices, database and directory replication, call routing, voice mail, applications, network infrastructure, and more. You'll learn how to read trace files, determine when to turn on tracing and Cisco IOS(r) Software voice debugging, and how to troubleshoot voice quality issues. Troubleshooting Cisco IP Telephony shows you how to break down problems to find the root cause. Descriptions of each part of the CIPT solution help you understand the functionality of each part of the solution and how each part interacts with other parts of the solution. You'll then learn what steps to take and tools to use to identify and resolve the cause of the problem.
Preis: 40.65 € | Versand*: 0 € -
Securing Cisco IP Telephony Networks
The real-world guide to securing Cisco-based IP telephony applications, devices, and networksCisco IP telephony leverages converged networks to dramatically reduce TCO and improve ROI. However, its critical importance to business communications and deep integration with enterprise IP networks make it susceptible to attacks that legacy telecom systems did not face. Now, there’s a comprehensive guide to securing the IP telephony components that ride atop data network infrastructures–and thereby providing IP telephony services that are safer, more resilient, more stable, and more scalable.Securing Cisco IP Telephony Networks provides comprehensive, up-to-date details for securing Cisco IP telephony equipment, underlying infrastructure, and telephony applications. Drawing on ten years of experience, senior network consultant Akhil Behl offers a complete security framework for use in any Cisco IP telephony environment. You’ll find best practices and detailed configuration examples for securing Cisco Unified Communications Manager (CUCM), Cisco Unity/Unity Connection, Cisco Unified Presence, Cisco Voice Gateways, Cisco IP Telephony Endpoints, and many other Cisco IP Telephony applications. The book showcases easy-to-follow Cisco IP Telephony applications and network security-centric examples in every chapter.This guide is invaluable to every technical professional and IT decision-maker concerned with securing Cisco IP telephony networks, including network engineers, administrators, architects, managers, security analysts, IT directors, and consultants. Recognize vulnerabilities caused by IP network integration, as well as VoIP’s unique security requirementsDiscover how hackers target IP telephony networks and proactively protect against each facet of their attacksImplement a flexible, proven methodology for end-to-end Cisco IP Telephony securityUse a layered (defense-in-depth) approach that builds on underlying network security designSecure CUCM, Cisco Unity/Unity Connection, CUPS, CUCM Express, and Cisco Unity Express platforms against internal and external threatsEstablish physical security, Layer 2 and Layer 3 security, and Cisco ASA-based perimeter securityComplete coverage of Cisco IP Telephony encryption and authentication fundamentalsConfigure Cisco IOS Voice Gateways to help prevent toll fraud and deter attacksSecure Cisco Voice Gatekeepers and Cisco Unified Border Element (CUBE) against rogue endpoints and other attack vectorsSecure Cisco IP telephony endpoints–Cisco Unified IP Phones (wired, wireless, and soft phone) from malicious insiders and external threats This IP communications book is part of the Cisco Press® Networking Technology Series. IP communications titles from Cisco Press help networking professionals understand voice and IP telephony technologies, plan and design converged networks, and implement network solutions for increased productivity.
Preis: 38.51 € | Versand*: 0 € -
Securing Cisco IP Telephony Networks
The real-world guide to securing Cisco-based IP telephony applications, devices, and networksCisco IP telephony leverages converged networks to dramatically reduce TCO and improve ROI. However, its critical importance to business communications and deep integration with enterprise IP networks make it susceptible to attacks that legacy telecom systems did not face. Now, there’s a comprehensive guide to securing the IP telephony components that ride atop data network infrastructures–and thereby providing IP telephony services that are safer, more resilient, more stable, and more scalable.Securing Cisco IP Telephony Networks provides comprehensive, up-to-date details for securing Cisco IP telephony equipment, underlying infrastructure, and telephony applications. Drawing on ten years of experience, senior network consultant Akhil Behl offers a complete security framework for use in any Cisco IP telephony environment. You’ll find best practices and detailed configuration examples for securing Cisco Unified Communications Manager (CUCM), Cisco Unity/Unity Connection, Cisco Unified Presence, Cisco Voice Gateways, Cisco IP Telephony Endpoints, and many other Cisco IP Telephony applications. The book showcases easy-to-follow Cisco IP Telephony applications and network security-centric examples in every chapter.This guide is invaluable to every technical professional and IT decision-maker concerned with securing Cisco IP telephony networks, including network engineers, administrators, architects, managers, security analysts, IT directors, and consultants. Recognize vulnerabilities caused by IP network integration, as well as VoIP’s unique security requirementsDiscover how hackers target IP telephony networks and proactively protect against each facet of their attacksImplement a flexible, proven methodology for end-to-end Cisco IP Telephony securityUse a layered (defense-in-depth) approach that builds on underlying network security designSecure CUCM, Cisco Unity/Unity Connection, CUPS, CUCM Express, and Cisco Unity Express platforms against internal and external threatsEstablish physical security, Layer 2 and Layer 3 security, and Cisco ASA-based perimeter securityComplete coverage of Cisco IP Telephony encryption and authentication fundamentalsConfigure Cisco IOS Voice Gateways to help prevent toll fraud and deter attacksSecure Cisco Voice Gatekeepers and Cisco Unified Border Element (CUBE) against rogue endpoints and other attack vectorsSecure Cisco IP telephony endpoints–Cisco Unified IP Phones (wired, wireless, and soft phone) from malicious insiders and external threats This IP communications book is part of the Cisco Press® Networking Technology Series. IP communications titles from Cisco Press help networking professionals understand voice and IP telephony technologies, plan and design converged networks, and implement network solutions for increased productivity.
Preis: 28.88 € | Versand*: 0 € -
Fax, Modem, and Text for IP Telephony
IP Telephony has revolutionized many aspects of telecommunications and it continues to be deployed at a rapid pace. The benefits of transporting voice over an IP infrastructure include increased flexibility, better scalability, and a significant cost savings over traditional telephony networks. However, during the deployment of these VoIP solutions, other types of traditional telephony communications that can also realize these same benefits are often overlooked or ignored. Fax, Modem, and Text for IP Telephony is a comprehensive resource that confronts the need for information on transporting alternative, non-voice communications over the IP protocol. Beginning with the basic theory and operation of fax, modem, and text telephony, this book then educates you on all of the current transport options that are available. An extensive design guide then provides the pertinent advice and best practices for making the correct planning decisions and choosing the best transport option for your network. Fax, Modem, and Text for IP Telephony also includes meticulous configuration and troubleshooting guides. The configuration guides in this book include a number of sample configurations and tips to manage any fax, modem, or text deployment. The troubleshooting guides present the essential methodologies, debugs, and analysis tools for quickly resolving both the common and complex issues that may be encountered. This book is the perfect companion to other VoIP resources, and it is the only book that empowers you to successfully handle any fax, modem, or text implementation. David Hanes, CCIE® No. 3491, is currently a senior engineer specializing in training, network design assistance, and troubleshooting of fax technologies for the Customer Assurance Engineering (CAE) group at Cisco®. Since joining Cisco in 1997, David has worked as a TAC engineer for the WAN, WAN Switching, and Multiservice Voice teams, a team lead for the Multiservice Voice team, and an escalation engineer covering a variety of voice and fax technologies. David has troubleshot escalated issues in Cisco customer networks worldwide and remains a technical resource for other Cisco employees and customers. Gonzalo Salgueiro CCIE No. 4541, is a senior escalation engineer supporting voice, fax, and modem technologies for the Cisco TAC. Gonzalo has spent more than 11 years troubleshooting complex issues in large-scale VoIP networks as well as providing technical leadership for some of the most critical worldwide voice and fax deployments. Prior to joining the Escalation Team in 1999 Gonzalo had roles as a TAC engineer for both the Access/Dial and Multiservice Voice teams as well as a team lead for the Access/Dial team. Learn basic and advanced operational theory and practical implementation of fax, modem, and text communications Understand how to implement fax, modem, and text communications using protocols such as H.323, SIP, MGCP, and SCCP. Explore the functionality and advantages of T.38 fax relay, passthrough, modem relay, T.37 Store-and-Forward Fax, and text relay for IP network deployments Employ expert-recommended best practices and design solutions for deploying fax, modem, and text in an IP telephony environment Optimize your network with comprehensive fax, modem, and text configuration and design tips for use with IOS and non-IOS gateways Master the latest fax, modem, and text troubleshooting tools and techniques employed by Cisco engineers Category: Cisco Press—IP Communication Covers: Fax, Modem, and Text Telephony Technologies for Integrated IP Networks
Preis: 39.58 € | Versand*: 0 €
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Was ist eine GSM Verbindung?
Was ist eine GSM Verbindung? Eine GSM (Global System for Mobile Communications) Verbindung ist eine Art von Mobilfunknetzwerk, das für die Übertragung von Sprache und Daten über Mobiltelefone verwendet wird. Es handelt sich um eine weit verbreitete Technologie, die in vielen Ländern auf der ganzen Welt eingesetzt wird. GSM ermöglicht es Benutzern, Anrufe zu tätigen, SMS zu senden und mobile Daten zu nutzen. Es bietet auch Sicherheitsfunktionen wie Verschlüsselung, um die Privatsphäre der Benutzer zu schützen. Insgesamt ist GSM eine wichtige Technologie, die die Grundlage für viele moderne Mobilfunknetzwerke bildet.
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Wie hat der Fortschritt im Bereich Mobilfunk die Kommunikation und Technologie verändert?
Der Fortschritt im Bereich Mobilfunk hat die Kommunikation revolutioniert, indem er es ermöglicht hat, jederzeit und überall miteinander in Verbindung zu bleiben. Durch die Entwicklung von Smartphones und mobilen Apps haben sich auch die Möglichkeiten der Technologie stark erweitert, was zu einer ständigen Vernetzung und Informationsverfügbarkeit geführt hat. Dies hat sowohl positive als auch negative Auswirkungen auf die Gesellschaft, da die Abhängigkeit von Mobilgeräten und die ständige Erreichbarkeit auch zu neuen Herausforderungen im Umgang mit Technologie führen.
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Wie wirkt sich die Verwendung von Wireless-Technologie auf die mobile Kommunikation aus?
Die Verwendung von Wireless-Technologie ermöglicht eine drahtlose Kommunikation über große Entfernungen. Dadurch sind mobile Geräte wie Smartphones und Tablets ständig vernetzt und können jederzeit auf Informationen zugreifen. Die mobile Kommunikation wird dadurch schneller, flexibler und effizienter.
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Wie hoch ist der Verbrauch von Datenvolumen, wenn kein GSM-Empfang vorhanden ist?
Wenn kein GSM-Empfang vorhanden ist, kann kein Datenvolumen verbraucht werden, da keine Verbindung zum Mobilfunknetz besteht. Das Gerät kann jedoch versuchen, eine Verbindung herzustellen, was zu einem erhöhten Energieverbrauch führen kann.
Ähnliche Suchbegriffe für Telephony:
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IP Telephony Using CallManager Express Lab Portfolio
IP Telephony Using CallManager Express Lab Portfolio provides a hands-on approach to learning the basic principles of voice over IP (VoIP) to build a voice-enabled network for the small to medium-sized business. As you work through the 51 labs in the book, you learn how to deploy a basic phone system using a CallManager Express-capable router. You install, configure, and customize Cisco® IP Phones to work in an IP Telephony environment as well as with traditional analog telephony devices. Each chapter begins with an explanation of the converging technology used within that chapter’s labs and, where necessary, includes a refresher on routing and switching topics so that you can properly set up the labs. The collection of labs features clear objectives, equipment needs, alternative methods, and probing questions. Additionally, the book includes a command reference as one of the six supplemental appendixes. All the material has been written and tested with students in a live classroom environment: Labs enable you to deploy a progressively more layered VoIP environment as you complete the labs in each chapter. Paper exercises help you work through and reinforce your understanding of fundamental topics such as dial plans, IP addressing, and dial peers. Case Study labs present the material in scenarios that combine the methods learned in the previous chapters so that you apply your knowledge to a specific scenario or task. Pulling together various concepts simulates the real-world environment where things are rarely assigned one step at a time. The Lab Portfolio can be used as a supplement to any textbook used to teach CVoice or CallManager Express. It can also be used as a standalone resource for anyone wanting to learn the basics of IP Telephony. After completing all the exercises and hands-on labs in this book, you will know how VoIP works and be well prepared to configure the technology in a small to medium-sized business. Use this Lab Portfolio with: Cisco IP Communications Express: CallManager Express with Cisco Unity Express ISBN: 1-58705-180-X Voice over IP Fundamentals, Second Edition ISBN: 1-58705-257-1 This book is part of the Networking Technology Series from Cisco Press®, the only authorized publisher for Cisco Systems®.
Preis: 43.86 € | Versand*: 0 € -
IP Telephony Using CallManager Express Lab Portfolio
IP Telephony Using CallManager Express Lab Portfolio provides a hands-on approach to learning the basic principles of voice over IP (VoIP) to build a voice-enabled network for the small to medium-sized business. As you work through the 51 labs in the book, you learn how to deploy a basic phone system using a CallManager Express-capable router. You install, configure, and customize Cisco® IP Phones to work in an IP Telephony environment as well as with traditional analog telephony devices. Each chapter begins with an explanation of the converging technology used within that chapter’s labs and, where necessary, includes a refresher on routing and switching topics so that you can properly set up the labs. The collection of labs features clear objectives, equipment needs, alternative methods, and probing questions. Additionally, the book includes a command reference as one of the six supplemental appendixes. All the material has been written and tested with students in a live classroom environment: Labs enable you to deploy a progressively more layered VoIP environment as you complete the labs in each chapter. Paper exercises help you work through and reinforce your understanding of fundamental topics such as dial plans, IP addressing, and dial peers. Case Study labs present the material in scenarios that combine the methods learned in the previous chapters so that you apply your knowledge to a specific scenario or task. Pulling together various concepts simulates the real-world environment where things are rarely assigned one step at a time. The Lab Portfolio can be used as a supplement to any textbook used to teach CVoice or CallManager Express. It can also be used as a standalone resource for anyone wanting to learn the basics of IP Telephony. After completing all the exercises and hands-on labs in this book, you will know how VoIP works and be well prepared to configure the technology in a small to medium-sized business. Use this Lab Portfolio with: Cisco IP Communications Express: CallManager Express with Cisco Unity Express ISBN: 1-58705-180-X Voice over IP Fundamentals, Second Edition ISBN: 1-58705-257-1 This book is part of the Networking Technology Series from Cisco Press®, the only authorized publisher for Cisco Systems®.
Preis: 43.86 € | Versand*: 0 € -
Cisco IP Telephony (CIPT) (Authorized Self-Study Guide)
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
Preis: 37.44 € | Versand*: 0 € -
Cisco QOS Exam Certification Guide (IP Telephony Self-Study)
This is the eBook version of the print title. The eBook edition does not provide access to the CD content that accompanies the print book. Official self-study test preparation guide for the Cisco QOS 642-642 exam. The official study guide helps you master all the topics on the QOS exam, including QoS concepts, tools, and architectures Modular QoS CLI (MQC), QoS Policy Manager (QPM), and AutoQoS Classification and marking Congestion management Traffic shaping and policing Congestion avoidance through drop policies Compression tools and link fragmentation and interleaving (LFI) tools for link efficiency LAN QoS QoS best practices The CCVP certification validates a robust set of skills in implementing, operating, configuring, and troubleshooting a converged IP network. A solid understanding of quality-of-service (QoS) features and implementation is essential for CCVP certification and is also a core component of the CCIP® certification. Cisco QOS Exam Certification Guide, Second Edition, is a best-of-breed Cisco® exam study guide that focuses specifically on the objectives for the QOS 642-642 exam. Senior instructor and best-selling author Wendell Odom and senior AVVID consultant Michael Cavanaugh share preparation hints and test-taking tips, helping you identify areas of weakness and improve your QoS knowledge. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. Cisco QOS Exam Certification Guide, Second Edition, presents you with an organized test preparation routine through the use of proven series elements and techniques. “Do I Know This Already?” quizzes open each chapter and allow you to decide how much time you need to spend on each section. Exam topic lists and Foundation Summary tables, figures, and snapshot information make referencing easy and give you a quick refresher whenever you need it. Challenging chapter-ending review questions help you assess your knowledge and reinforce key concepts. The companion CD-ROM contains a powerful testing engine that allows you to focus on individual topic areas or take complete, timed exams. The assessment engine also tracks your performance and provides feedback on a module-by-module basis, presenting question-by-question remediation to the text. Well-regarded for its level of detail, assessment features, and challenging review questions and exercises, this book helps you master the concepts and techniques that will enable you to succeed on the exam the first time. Cisco QOS Exam Certification Guide, 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. This volume is part of the Exam Certification Guide Series from Cisco Press®. Books in this series provide officially developed exam preparation materials that offer assessment, review, and practice to help Cisco Career Certification candidates identify weaknesses, concentrate their study efforts, and enhance their confidence as exam day nears.
Preis: 39.58 € | Versand*: 0 €
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Wie kann die Verbindung von Wireless-Geräten in einem Netzwerk optimiert werden, um eine effiziente Datenübertragung zu gewährleisten?
Die Verbindung kann optimiert werden, indem man die Position der Geräte im Netzwerk optimiert, um Störungen zu minimieren. Außerdem sollte man auf eine ausreichende Signalstärke und Bandbreite achten. Die Verwendung von modernen WLAN-Standards und -Geräten kann ebenfalls die Effizienz der Datenübertragung verbessern.
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Ist der Empfang des Disney Channels im Free-TV schlecht?
Der Empfang des Disney Channels im Free-TV kann von verschiedenen Faktoren abhängen, wie zum Beispiel der Qualität des TV-Empfangs in der jeweiligen Region, der Art der Antenne oder des Kabelanschlusses und möglichen Störungen. Es ist möglich, dass einige Zuschauer gelegentlich Probleme mit dem Empfang haben, während andere eine gute Signalqualität haben.
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Wie können Signale in der Natur und Technologie zur Kommunikation und Übertragung von Informationen genutzt werden?
In der Natur können Tiere wie Vögel, Bienen und Wale Signale wie Gesänge, Tänze oder chemische Botenstoffe verwenden, um Informationen zu kommunizieren. In der Technologie werden Signale wie elektromagnetische Wellen, Licht oder Schall genutzt, um Daten zu übertragen, z.B. in der Telekommunikation oder bei der drahtlosen Datenübertragung. Durch die Nutzung von Signalen können Informationen effizient und schnell zwischen verschiedenen Parteien ausgetauscht werden.
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Wie werden optoelektronische Bauelemente zur Übertragung von Informationen in der Telekommunikation eingesetzt?
Optoelektronische Bauelemente wie Laserdioden und Photodioden werden in optischen Übertragungssystemen verwendet, um Daten in Form von Lichtsignalen zu übertragen. Die Laserdioden erzeugen das Lichtsignal, welches dann über Glasfaserkabel übertragen wird. Am Empfangsende wandeln die Photodioden das Lichtsignal wieder in elektrische Signale um, die dann weiterverarbeitet werden.
* Alle Preise verstehen sich inklusive der gesetzlichen Mehrwertsteuer und ggf. zuzüglich Versandkosten. Die Angebotsinformationen basieren auf den Angaben des jeweiligen Shops und werden über automatisierte Prozesse aktualisiert. Eine Aktualisierung in Echtzeit findet nicht statt, so dass es im Einzelfall zu Abweichungen kommen kann.