"More and more businesses today are having their phone service delivered to them through their Internet connection instead of the local phone company. This method of receiving service over the Internet is known as VoIP (an acronym for ""Voice Over IP""). VoIP has become a viable solution and has piqued the interest of companies small and large. The primary reason for migrating to VoIP is cost, as it limits long-distance charges to the nominal cost of email--instead of the normal toll charges levied by traditional phone companies. Developed from real-world experience by a senior developer, O'Reilly's Switching to VoIP provides solutions for the most common VoIP migration challenges. So if you're a network professional who is migrating from a traditional telephony system to a modern, feature-rich network, this book is a must-have. You'll discover the difference between circuit-switched and packet-switched networks, how packet-switched voice systems impact network infrastructure, as well as solutions for common challenges involved with IP voice migrations. Among the challenges discussed: user-technology cohesiveness; quality of service; scalability; topological considerations; applications; retro-interfacing to traditional telephony. To help you better grasp the core principles at work, Switching to VoIP uses a combination of strategy and ""how-to"" using Cisco internetworking devices, various makes of IP telephone equipment, and the Asterisk open source PBX software by Digium. If VoIP has got your attention, like so many others, then Switching to VoIP will help you build your own system, install it, and begin making calls. It's the only thing left between you and a more affordable corporate phone bill."
By:
Theodore Wallingford
Imprint: O'Reilly Media
Country of Publication: United States
Dimensions:
Height: 233mm,
Width: 178mm,
Spine: 25mm
Weight: 796g
ISBN: 9780596008680
ISBN 10: 0596008686
Pages: 504
Publication Date: 09 August 2005
Audience:
Professional and scholarly
,
Undergraduate
Format: Paperback
Publisher's Status: Active
"Foreword Preface 1. Voice and Data: Two Separate Worlds? The PSTN Key Systems and PBXs Limits of Traditional Telephony VoIP in the Home VoIP in Business VoIP's Changing Reputation Key Issues: Voice and Data: Two Separate Worlds 2. Voice over Data: Many Conversations, One Network VoIP or IP Telephony Distributed Versus Mainframe Key Issues: Voice over Data: Many Conversations, One Network 3. Linux as a PBX Free Telephony Software Installing Legacy Interface Cards Compiling and Installing Asterisk Monitoring Asterisk Key Issues: Linux as a PBX 4. Circuit-Switched Telephony Regulation and Organization of the PSTN Components of the PSTN Customer Premises Equipment Time Division Multiplexing Point-to-Point Trunking Legacy Endpoints Dial-Plan and PBX Design Key Issues: Circuit-Switched Telephony 5. Enterprise Telephony Applications Application Terminology Basic Call Handling Administrative Applications Messaging Applications Advanced Call-Handling Applications CTI Applications Key Issues: Telephony Applications 6. Replacing the Voice Circuit with VoIP The ""Dumb"" Transport Voice Channels Key Issues: Replacing the Voice Circuit with VoIP 7. Replacing Call Signaling with VoIP VoIP Signaling Protocols H.323 SIP IAX MGCP Cisco SCCP Heterogeneous Signaling Key Issues: Replacing Call Signaling with VoIP 8. VoIP Readiness Assessing VoIP Readiness Business Environment Network Environment Implementation Plan Key Issues: VoIP Readiness 9. Quality of Service QoS Past and Present Latency, Packet Loss, and Jitter CoS 802.1q VLAN Quality of Service Residential QoS Voice QoS on Windows Best Practices for Quality of Service Key Issues: Quality of Service 10. Security and Monitoring Security in Traditional Telephony Security for IP Telephony Access Control Software Maintenance and Hardening Intrusion Prevention and Monitoring Key Issues: Security and Monitoring 11. Troubleshooting Tools VoIP Troubleshooting Tools The Three Things You'll Troubleshoot SIP Packet Inspection Interoperability When, Not if, You Have Problems- Simulating Media Loads Key Issues: Troubleshooting Tools 12. PSTN Trunks Dial-Tone Trunks Routing PSTN Calls at Connect Points Timing Trunk Transitions Key Issues: PSTN Trunks 13. Network Infrastructure for VoIP Legacy Trunks VoIP Trunks WAN Design Disaster Survivability Metro-Area Links Firewall Issues Peer-by-Peer Codec Selection Key Issues: Network Infrastructure for VoIP 14. Traditional Apps on the Converged Network Fax and Modems Fire and Burglary Systems Surveillance Systems and Videoconferencing Voice Mail and IVR Emergency Dispatch/911 Key Issues: Traditional Apps on the Converged Network 15. What Can Go Wrong? Common Problem Situations Key Issues: What Can Go Wrong? 16. VoIP Vendors and Services Softphones and Instant Messaging Software Skype Other Desktop Telephony Software Developer Tools and SoftPBX Systems VoIP Service Providers Telephony Hardware Vendors 17. Asterisk Reference How Asterisk Is Supported Asterisk's Configuration Files Asterisk Dial-Plan Asterisk Channels The Asterisk CLI Integrating Asterisk with Other Software Key Issues: Asterisk Reference A. SIP Methods and Responses B. AGI Commands C. Asterisk Manager Socket API Syntax Glossary Index"
Born and raised in Detroit, MI, Ted Wallingford began working with information systems at the age of 7, when his father brought home a used Timex Sinclair 1000 computer and a notepad of hand-written BASIC programs from a garage sale. This little machine was the start of an eclectic career in the business of bits and bytes. While working in the data center at ad agency J. Walter Thompson, Ted began to write articles for computer magazines. This led him into writing marketing materials for Gateway Computer and the former Amiga Inc., where he was also webmaster in 1999. As I.T. Director for a large, private construction firm, Ted transformed a single-operator midrange computer room into a mission-critical 24x7 data center hosting services for lines of business across the country. Ted has designed and implemented Voice over IP on networks large and small. He offers network design for VoIP systems and product management assistance for up'n'coming VoIP carriers through his macVoIP.com consulting practice. Ted believes that VoIP and the Internet are today's revolution in distance communication. Aside from technology and writing, Ted has served as a member of the board of trustees for an international adoption agency in suburban Cleveland, where he lives with his wife and two children.
