Practical Asterisk 1.4 and 1.6 :
Wintermeyer; Bosch.
Practical Asterisk 1.4 and 1.6 : From Beginner to Expert [electronic resource] / - Addison-Wesley Professional, 2010.
9781282677234 9788131748428
Practical Asterisk 1.4 and 1.6 : From Beginner to Expert [electronic resource] / - Addison-Wesley Professional, 2010.
9781282677234 9788131748428