Download or read book Voice Over IP VoIP Essentials for CCNT Certification written by Brent Capriotti and published by . This book was released on 2001 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CCNA Voice Study Guide written by Andrew Froehlich and published by John Wiley & Sons. This book was released on 2010-07-01 with total page 679 pages. Available in PDF, EPUB and Kindle. Book excerpt: The ultimate guide to the new CCNA voice network administrator certification exam The new CCNA Voice exam tests candidates on their ability to implement a Cisco VoIP solution. Network administrators of voice systems will appreciate that the CCNA Voice Study Guide focuses completely on the information required by the exam. Along with hands-on labs and an objective map showing where each objective is covered, this guide includes a CD with the Sybex Test Engine, flashcards, and entire book in PDF format. The new CCNA Voice certification will be valuable for administrators of voice network systems using Cisco VoIP solutions From Sybex, the leading CCNA publisher, this guide offers in-depth coverage of every exam objective and the technology developed by Cisco for VoIP systems Covers the components of the Cisco Unified Communications Architecture as well as PSTN and VoIP components and technologies Shows how to configure gateways, voice ports, and dial peers Demonstrates how to configure a Cisco network to support VoIP and implement voicemail CD-ROM includes the Sybex Test Engine, flashcards, and entire book in PDF format CCNA Voice Study Guide will thoroughly prepare candidates for the new CCNA Voice certification. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
Download or read book Computer Telephony Integration CTI Essentials for CCNT Certification written by Certification Partners, LLC and published by . This book was released on 2000-04 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book CVOICE 8 0 written by Andrew Froehlich and published by John Wiley & Sons. This book was released on 2011-10-11 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: VoIP and convergence are hot topics, and the CVOICE 8.0 exam targets candidates looking to pass Exam 642-437 and pursue their CCNP Voice certification. Companies continue to add VoIP service at a record pace, and network administrators are ramping up their skills. This new member of the Sybex Study Guide series covers everything you’ll need to know to pass the certification exam. VoIP (Voice over IP) is rapidly becoming a preferred solution for companies, and Cisco has responded to the need with a new certification to assure proficiency in VoIP technology Prepares IT professionals for the CVOICE 8.0 exam and includes a CD with the Sybex Test Engine, flashcards, and the Glossary in PDF format. Covers gateway components, dial plans, basic operation and components of VoIP, how to implement a gateway, the function and interoperation of gatekeepers, how to implement an IP-to-IP gateway, and more Administrators of Cisco VoIP networks will find all the essential tools for CVOICE exam success in CVOICE 8.0: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 Study Guide.
Download or read book Implementing Cisco Unified Communications Voice over IP and QoS Cvoice Foundation Learning Guide written by Kevin Wallace and published by Cisco Press. This book was released on 2011-05-23 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Implementing Cisco Unified Communications Voice over IP and QoS (CVOICE) Foundation Learning Guide Foundation Learning for the CCNP® Voice (CVOICE) 642-437 Exam Kevin Wallace, CCIE® No. 7945 Implementing Cisco Unified Communications Voice over IP and QoS (CVOICE) Foundation Learning Guide is a Cisco®-authorized, self-paced learning tool for CCNP Voice foundation learning. Developed in conjunction with the Cisco CCNP Voice certification team, it covers all aspects of planning, designing, and deploying Cisco VoIP networks and integrating gateways, gatekeepers, and QoS into them. Updated throughout for the new CCNP Voice (CVOICE) Version 8.0 exam (642-437), this guide teaches you how to implement and operate gateways, gatekeepers, Cisco Unified Border Element, Cisco Unified Communications Manager Express, and QoS in a voice network architecture. Coverage includes voice gateways, characteristics of VoIP call legs, dial plans and their implementation, basic implementation of IP phones in Cisco Unified Communications Manager Express environment, and essential information about gatekeepers and Cisco Unified Border Element. The book also provides information on voice-related QoS mechanisms that are required in Cisco Unified Communications networks. Fourteen video lab demonstrations on the accompanying CD-ROM walk you step by step through configuring DHCP servers, CUCME autoregistration, ISDN PRI circuits, PSTN dial plans, DID, H.323 and MGCP gateways, VoIP dial peering, gatekeepers, COR, AutoQoS VoIP, and much more. Whether you are preparing for CCNP Voice certification or simply want to gain a better understanding of VoIP and QoS, you will benefit from the foundation information presented in this book. - Voice gateways, including operational modes, functions, related call leg types, and routing techniques - Gateway connections to traditional voice circuits via analog and digital interfaces - Basic VoIP configuration, including A/D conversion, encoding, packetization, gateway protocols, dial peers, and transmission of DTMF, fax, and modem tones - Supporting Cisco IP Phones with Cisco Unified Communications Manager Express - Dial plans, including digit manipulation, path selection, calling privileges, and more - Gatekeepers, Cisco Unified Border Elements, and call admission control (CAC) configuration - QoS issues and mechanisms - Unique DiffServ QoS characteristics and mechanisms - Cisco AutoQoS configuration and operation Companion CD-ROM The CD-ROM that accompanies this book contains 14 video lab demonstrations running approximately 90 minutes. This book is in the Foundation Learning Guide Series. These guides are developed together with Cisco® as the only authorized, self-paced learning tools that help networking professionals build their understanding of networking concepts and prepare for Cisco certification exams.
Download or read book Voice Over IP Fundamentals written by Jonathan Davidson and published by Cisco Press. This book was released on 2000 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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 Fundamentalsprovides 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.
Download or read book CCNA Voice 640 461 Official Cert Guide written by Jeremy Cioara and published by Cisco Press. This book was released on 2011-08-18 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trust the best selling Official Cert Guide series from Cisco Press to help you learn, prepare, and practice for exam success. They are built with the objective of providing assessment, review, and practice to help ensure you are fully prepared for your certification exam. CCNA Voice 640-461 Official Cert Guide 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 enable you to decide how much time you need to spend on each section. Exam topic lists make referencing easy. Chapter-ending Exam Preparation Tasks help you drill on key concepts you must know thoroughly. Master Cisco CCNA Voice 640-461 exam topics Assess your knowledge with chapter-opening quizzes Review key concepts with exam preparation tasks Practice with200+ realistic exam questions on the CD-ROM CCNA Voice 640-461 Official Cert Guide focuses specifically on the objectives for the CCNA Voice ICOMM exam. Senior voice consultants and trainers Jeremy Cioara and Michael Valentine share preparation hints and test-taking tips, helping you identify areas of weakness and improve both your conceptual knowledge and hands-on skills. Material is presented in a concise manner, focusing on increasing your understanding and retention of exam topics. The companion CD-ROM contains a powerful Pearson IT Certification Practice Test engine that enables you to focus on individual topic areas or take a complete, timed exam. The assessment engine also tracks your performance and provides feedback on a module-by-module basis, laying out a complete assessment of your knowledge to help you focus your study where it is needed most. Well-regarded for its level of detail, assessment features, comprehensive design scenarios, and challenging review questions and exercises, this official study guide helps you master the concepts and techniques that will enable you to succeed on the exam the first time. The official study guide helps you master all the topics on the CCNA Voice exam, including: Voice and data convergence IP phone connections to the LAN infrastructure Cisco Unified Communications Manager Express CUCM Express IP phone configuration and voice productivity features Gateways and trunks Cisco Unity Express Smart Business Communications System UC500 series for voice CCNA Voice 640-461 Official Cert Guide is part of a recommended learning path from Cisco 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. The print edition of the CCNA Voice 640-461 Official Cert Guide contains two free, complete practice exam. Pearson IT Certification Practice Test minimum system requirements: Windows XP (SP3), Windows Vista (SP2), or Windows 7; Microsoft .NET Framework 4.0 Client; Microsoft SQL Server Compact 4.0; Pentium class 1GHz processor (or equivalent); 512 MB RAM; 650 MB disc space plus 50 MB for each downloaded practice exam Also available from Cisco Press for Cisco CCNA Voice study is the CCNA Voice 640-461 Official Cert Guide Premium Edition eBook and Practice Test. This digital-only certification preparation product combines an eBook with enhanced Pearson IT Certification Practice Test. This integrated learning package: Allows you to focus on individual topic areas or take complete, timed exams Includes direct links from each question to detailed tutorials to help you understand the concepts behind the questions Provides unique sets of exam-realistic practice questions Tracks your performance and provides feedback on a module-by-module basis, laying out a complete assessment of your knowledge to help you focus your study where it is needed most
Download or read book Cisco QOS Exam Certification Guide IP Telephony Self Study written by Wendell Odom and published by Pearson Education. This book was released on 2004-11-18 with total page 1072 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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. 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.
Download or read book Voice Over IP First step written by Kevin Wallace and published by . This book was released on 2006 with total page 340 pages. Available in PDF, EPUB and Kindle. Book excerpt: No previous knowledge is required to learn the basics of VoIP, which is advancing rapidly across the enterprise and smaller networks due to the cost savings and user benefits. The book's conversational style and use of case studies, tips, notes, alerts, chapter objectives, chapter summaries, and other elements will help the reader understand and retain basic telephony concepts and theories.
Download or read book Cisco Voice over IP CVOICE Authorized Self Study Guide written by Kevin Wallace and published by Pearson Education. This book was released on 2008-07-16 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Authorized Self-Study Guide Cisco Voice over IP (CVOICE) Third Edition Foundation learning for CVOICE exam 642-436 Kevin Wallace, CCIE No. 7945 Cisco Voice over IP (CVOICE), Third Edition, is a Cisco-authorized, self-paced learning tool for CCVP foundation learning. This book provides you with the knowledge and skills required to plan, design, and deploy a Cisco voice-over-IP (VoIP) network and to integrate gateways and gatekeepers into an enterprise VoIP network. By reading this book, you will gain a thorough understanding of converged voice and data networks and also the challenges you will face implementing various network technologies. Cisco Voice over IP (CVOICE) presents you with information on the foundational elements of VoIP calls, the description of dial plans, and the implementation of gateways, gatekeepers, and Cisco Unified Border Elements (Cisco UBEs). The book gives you the information needed to implement and support data and voice integration solutions at the network-access level. Whether you are preparing for CCVP certification or simply want to gain a better understanding of VoIP fundamentals, you will benefit from the foundation information presented in this book. Cisco Voice over IP (CVOICE), Third Edition, is part of a recommended learning path from Cisco 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 http://www.cisco.com/go/authorizedtraining. Kevin Wallace, CCIE No. 7945, is a certified Cisco instructor, and he teaches courses in the Cisco CCSP, CCVP, and CCNP® tracks. With 19 years of Cisco networking experience, Kevin has been a network design specialist for the Walt Disney World Resort and a network manager for Eastern Kentucky University. Integrate VoIP into an existing data network Design a VoIP network for optimal voice quality Examine the various call types in a VoIP network Configure analog voice interfaces and dial peers Perform call signaling over digital voice ports Implement H.323, MGCP, and SIP protocols on Cisco IOS® gateways Identify dial plan characteristics Configure advanced dial plans Deploy H.323 gatekeepers Implement a Cisco UBE router to provide protocol interworking
Download or read book CCNA Cisco Certified Network Associate Deluxe Study Guide written by Todd Lammle and published by John Wiley & Sons. This book was released on 2011-03-04 with total page 870 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deluxe Edition of Best-Selling CCNA Study Guide This comprehensive, enhanced version of the Sybex CCNA Study Guide provides certification candidates with the additional tools they need to prepare for this popular exam. With additional bonus exams and flashcards, as well as the exclusive CCNA Virtual Lab, Platinum Edition, this comprehensive guide has been completely updated to reflect the latest CCNA 640-802 exam. Written by Cisco Authority Todd Lammle, whose straightforward style provides lively examples, hands-on and written labs, easy-to-understand analogies, and real-world scenarios that will not only help you prepare for the exam, but also give you a solid foundation as a Cisco networking professional. This Study Guide teaches you how to Describe how a network works Configure, verify and troubleshoot a switch with VLANs and interswitch communications Implement an IP addressing scheme and IP Services to meet network requirements in a medium-size Enterprise branch office network. Configure, verify, and troubleshoot basic router operation and routing on Cisco devices Explain and select the appropriate administrative tasks required for a WLAN Identify security threats to a network and describe general methods to mitigate those threats Implement, verify, and troubleshoot NAT and ACLs in a medium-size Enterprise branch office network. Implement and verify WAN links On the CD-ROM: Chapter Review Questions Full-Length Practice Exams Electronic Flashcards Exclusive CD-only bonus material, including the CCNA Simulation Exam Practice Guide All new Audio and Video Instruction from Todd Lammle On the Bonus 2nd CD-ROM The CCNA Virtual Lab, Platinum Edition. Users can work in a Cisco environment without having to spend the thousands of dollars on the pricy equipment. Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file. For Instructors: Teaching supplements are available for this title.
Download or read book CCNA Voice Official Exam Certification Guide 640 460 IIUC written by Jeremy Cioara and published by Pearson Education India. This book was released on 2009 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Beyond VoIP Protocols written by Olivier Hersent and published by John Wiley & Sons. This book was released on 2005-03-04 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1999-2000, VoIP (Voice-over-IP) telephony was one of the most successful buzzwords of the telecom bubble era. However, in 2001-2003, VoIP faced a very tough reality check. Now, manufacturers and service providers are drawing on what they have learnt from past experience in order to prepare to participate in the next major challenge faced by the telecommunications industry. This book offers a comprehensive overview of the issues to solve in order to deploy global revenue-generating effective "multimedia" services. Drawing on extensive research and practical deployment experience in VoIP, the authors provide essential advice for those seeking to design and implement a post-bubble VoIP network. Beyond VoIP Protocols: Understanding Voice Technology and Networking Techniques for IP Telephony Introduces the basics of speech coding and voice quality Demonstrates how quality of service may be built into the network and deals with dimensioning aspects, e.g. multipoint communications and how to model call seizures. Explores the potential of multicast to turn an IP backbone into an optimized broadcast medium Includes amply illustrated, state-of-the-art practical advice for formulating a complete deployment strategy A companion volume to "IP Telephony: Deploying VoIP Protocols", this book takes the reader a stage deeper into how to prepare the network and exploit VoIP technology to its full potential.
Download or read book CCNA Voice Portable Command Guide written by Robert M. Cannistra and published by Cisco Press. This book was released on 2013-02-07 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: Preparing for the latest CCNA® Voice exam? Here are all the CCNA Voice commands you’ll need to prepare for the Cisco 640-461 ICOMM v8.0 Exam, in one handy, condensed resource. Filled with valuable, easy-to-access information, the CCNA Voice Portable Command Guide is portable enough for you to use whether you’re in the server room or the equipment closet. This quick reference summarizes all commands, keywords, command arguments, and associated prompts relevant for Exam 640-461, and offers tips and examples for applying these commands in live Cisco Unified Communications environments. Topics covered include • Fundamentals: Unified Communications components, functions, call signaling, media flows, and VoIP quality • Preparation: Configure Cisco switches, routers, and other devices to support Unified Voice • Provisioning: Create/modify users, accounts, endpoints, directory numbers, user and mobility features, and calling privileges • Messaging and Presence: Configure voice messaging, Cisco Unity Connection, and Cisco Unified Presence • Management/Monitoring: Generate reports, monitor voicemail usage, perform backups, and more • Support: Verify PSTN connectivity and define fault domains; troubleshoot endpoints, call quality, and voicemail Access all CCNA Voice commands–use as a quick, offline resource for research and solutions Logical how-to topic groupings provide one-stop research Great for review before CCNA Voice 640-461 certification exams Includes configuration examples for Cisco Unified Communications Manager, Cisco Unified Communications Manager Express, Cisco Unity Connection, and Cisco Unified Presence Compact size makes it easy to carry with you, wherever you go “Create Your Own Journal” section with blank, lined pages allows you to personalize the book for your needs “What Do You Want to Do?” chart inside cover helps you quickly reference specific tasks This book is part of the Cisco Press® Certification Self-Study Product Family, which offers readers a self-paced study routine for Cisco® certification exams. Titles in the Cisco Press Certification Self-Study Product Family are part of a recommended learning program from Cisco that includes simulation and hands-on training from authorized Cisco Learning Partners and self-study products from Cisco Press.
Download or read book CVOICE 8 0 written by Andrew Froehlich and published by . This book was released on 2011 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: A complete study guide to the new, must-have certification for VoIP professionals VoIP and convergence are hot topics, and the CVOICE exam targets candidates looking to take the CCNA Voice Enterprise option in their pursuit of advanced certification. Companies continue to add VoIP service at a record pace, and network administrators are ramping up their skills. This new member of the Sybex Study Guide series covers everything you'll need to know to pass the certification exam for the newest component of the CCNA group, CVOICE. VoIP (Voice over IP) is rapidly becoming a preferred solution for companies, and Cisco has responded to the need with a new certification to assure proficiency in VoIP technology Prepares IT professionals for the CVOICE 8.0 exam and includes a CD with the Sybex Test Engine, flashcards, the Glossary in PDF format, and sample video walkthroughs from the author. Covers gateway components, dial plans, basic operation and components of VoIP, how to implement a gateway, the function and interoperation of gatekeepers, how to implement an IP-to-IP gateway, and more Administrators of Cisco VoIP networks will find all the essential tools for CVOICE exam success in CVOICE: Cisco Voice Over IP Study Guide.
Download or read book Authorized Self study Guide written by Kevin Wallace and published by . This book was released on 2007 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new edition of this title is available, ISBN-10: 1587055546 ISBN-13: 9781587055546 Foundation learning for CCVP voice over IP Kevin Wallace, CCIE® No. 7945 Cisco Voice over IP, Second Edition, is a Cisco®-authorized, self-paced learning tool for Cisco Certified Voice Professional (CCVP) voice over IP (VoIP) foundation learning. This book provides you with the knowledge you need to implement and support data and voice integration solutions at the network-access level. By reading this book, you will gain a thorough understanding of basic IP telephony operation and router configuration, support, troubleshooting, and integration with an existing public switched telephone network (PSTN). Cisco Voice over IP lays the foundation for gaining hands-on skills and a significant understanding of packet telephony. Coverage includes analog and digital voice connections, voice interface configuration, voice dial peer configuration, VoIP fundamentals, VoIP signaling and call control protocols, and voice quality improvement and maintenance. Chapter review questions, practice items, real-world examples, and hands-on lab exercises all help reinforce learning. Whether you are preparing for CCVP certification or simply want to gain a better understanding of VoIP, you will benefit from the foundation information presented in this book. Cisco Voice over IP 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. Kevin Wallace, CCIE® No. 7945, CCVP, CCNP®, CCDP®, is a full-time instructor for Thomson NETg. With 17 years of Cisco internetworking experience, Kevin has been a network design specialist for The Walt Disney World Resort and a network manager for Eastern Kentucky University. Understand traditional telephony network concepts and operation as well as the building blocks of packet telephony networks Examine the interactions of telephony operations at an electrical level Evaluate strategies for overcoming specific challenges in a VoIP network, such as the transmission of fax and modem tones Attach a Cisco voice-enabled router to existing telephony devices, such as a PBX or an analog phone Add call-routing intelligence to a Cisco voice-enabled router through the use of dial peers Address potential challenges and design considerations associated with sending voice across an IP-based network Understand the theory and configuration of the call control protocols including H.323, SIP, and MGCP Mitigate voice quality issues with various Cisco quality of service (QoS) mechanisms 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: VoIP
