Found 2 books

Asterisk 1.4 &#150 · the Professional&#146 · S Guide

[en] Asterisk 1.4 &#150 · the Professional&#146 · S Guide Packt Publishing

Duffett, David, Middleton, Nik, Carpenter, Colman & Plain, Ian & Duffett, David & Middleton, Nik

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Asterisk 1.4 · The Professional's Guide

[en] Asterisk 1.4 · The Professional's Guide Packt Publishing

Duffett, David & Middleton, Nik & Carpenter, Colman & Plain, Ian

download read it!