Packet Guide to Voice over IP: A system administrator's guide to VoIP technologies

This is a very good summary of the how to do voicxe iver internet telephone calls

Very detailed on the codecs

This is a good read for those with an intermediate level of telecom and VoIP technology. Chapters 3 & 4 cover sip and rtp in the kind of detail that will bring your diagnostic skills (when it comes to reading VoIP packet captures) up a few levels. If you are a beginner, read this after you have had a little experience reading this stuff in Wireshark otherwise your eyes will glaze over. Covers Cisco Skinny enough for you to know it when you see it.

It's a handy pocket reference. I use it often.

Probably not the book you want if you plan on wanting to get up and running quickly.

Es un gran libro, con una explicación clara del funcionamiento de voip así como sus tipos de arquitectura

This book has nearly no info in it. If you want to have learn something about VOIP then save your money on that one.

I recommend, that anyone trying to work with Asterisk, 3CX or any of the other PBX solutions reads this book first.

El libro llego antes de la fecha (y en domingo,eso es muy bueno),esta impecable ,en perfectas condiciones,como si lo hubiera comprado hace unos momentos.

Awesome book,