Switching to VoIP

Fülszöveg

Network i ng/Sy stem Administ rat ion O'REILLY* Switching to VoIP Have yoLi been following VoIP over the past few years and wondering whether it's time to take the plunge and try it out? Stop wondering-VoIP is ready! Cutting the ties to your traditional phone company might seem intimidating, but it doesn't have to be. Switching to VoIP provides solutions for the most common migration challenges. You'll discover how VoIP systems impact network infrastructure, the strengths and weaknesses of circuitswitched and packet-switched networks, and how to solve many problems you're likely to face during the transition: everything from "the users don't like it" to "the phone company screwed up." Among the challenges discussed are: • Building a softPBX • Configuring IP phones • Ensuring quality of service • Scalability • Standards compliance • Topological considerations • Coordinating a complete system switchover • Migrating applications such as voice mail and directory services • Interfacing... Tovább

Fülszöveg

Network i ng/Sy stem Administ rat ion O'REILLY* Switching to VoIP Have yoLi been following VoIP over the past few years and wondering whether it's time to take the plunge and try it out? Stop wondering-VoIP is ready! Cutting the ties to your traditional phone company might seem intimidating, but it doesn't have to be. Switching to VoIP provides solutions for the most common migration challenges. You'll discover how VoIP systems impact network infrastructure, the strengths and weaknesses of circuitswitched and packet-switched networks, and how to solve many problems you're likely to face during the transition: everything from "the users don't like it" to "the phone company screwed up." Among the challenges discussed are: • Building a softPBX • Configuring IP phones • Ensuring quality of service • Scalability • Standards compliance • Topological considerations • Coordinating a complete system switchover • Migrating applications such as voice mail and directory services • Interfacing to traditional telephony systems • Supporting mobile users • Security and survivability • Dealing with the challenges of NAT Unlike other books on IP telephony, Switching to VoIP is filled with hands-on projects that introduce VoIP routers and media gateways, various makes of IP telephone equipment, Cisco routers, legacy analog phones, iptables and Linux firewalls, and the Asterisk open source PBX software. You'll learn how to build an IP-based or legacy-compatible phone and voice mail system complete with email integration, and you'll become familiar with VoIP protocols and devices. Switching to VoIP will help you design and install your own VoIP phone system so that you can begin making calls. This book is the only thing left between you and a modern telecom network. 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. Foreword by Mark Spencer, original author and maintainer of Asterisk and president of Digium. Vissza