Definitive Asterisk for engineers
5.0(3)IP broadcast fundamentals
5.0(3)Total IPTV for engineers
5.0(3)Definitive VoIP for engineers
5.0(3)LTE Architecture and Protocols
5.0(3)Total SMTP and email for engineers
5.0(3)MySQL Performance & Tuning
5.0(3)Complete JavaScript
5.0(3)