Instruct: Classify a given Amazon review as either positive or negative.
Query: A very effective introduction

Finally a book from a known publishing house about softswitch. The book is about the definition, need and scope of the softswitch from both a technical and economic perspective. The piece dealing with the current trend and the future market is particularly well written. Highly recommended to the newbies as well as to the know-it-all folks of softswitch world.