Businesses today receive phone service through Internet without having to deal with local phone company lines.They also use their internal local and wide area network infrastructure to replace enterprise telephone networks.
This migration to a single network carrying voice and data is called convergence and technology of families driving this convergence is called VoIP.The reason for migrating to VoIP is cost, because it equalizes the costs of long distance calls, local calls, and e-mails to fractions of a penny per use.VoIP also empowers businesses to customize telecom and datacom solutions using a single, cohesive networking platform.
In this book you will discover strengths and weaknesses of circuit-switched and packet-switched networks, how VoIP systems impact network infrastructure, as well as solutions for common challenges involved with IP voice migrations.
Some of the challenges and solutions involve are ....
configuring IP phones
ensuring quality of service
scalability
topological considerations
migrating applications like voicemail and directory services
retro-interfacing to traditional telephony
supporting mobile users
security
dealing with the challenges of NAT
You'll learn how to build an IP-based phone system and voicemail system complete with e-mail integration while becoming familiar with VoIP protocols and devices.
The link to this free ebook from rapidshare is....
http://rapidshare.com/files/953054/N0596008686.rar
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