Telephone infrastructure in our days is very changeable and it is very hard to keep abreast of this area. It is very hard develop new interesting methods that wouldn’t be new more that 2-4 weeks, because the market develops very fast moving. This book is talking about Michael Bayer's Computer Telephony Demystified, their progress, gains in this area. Besides, here you can know about customizable telephony technology from the inside. And really, it would be very interesting for call center managers, for telecom engineers and for students as well.