Hello everyone. Anyone here have comments about those CISCO BOOKS:
Cisco CallManager Fundamentals, Second Edition
By John Alexander, Chris Pearce, Anne Smith, Delon Whetten
ISBN: 1-58705-192-3
Cisco IP Telephony: Planning, Design, Implementation, Operation, and Optimization
By Ramesh Kaza, Salman Asadullah
ISBN : 1-58705-157-5
Configuring CallManager and Unity: A Step-by-Step Guide
By David Bateman
ISBN: 1-58705-196-6
THANKS