Cvoice 8.0 : implementing cisco unified communications voice over ip and qos v8.0 study guide (642-437), with cd - Froehlich, Andrew G. (Indianapolis, IN : Wiley Pubishing, Inc., 2011)
'Exam 642-437'-- cover.
Includes index.
Keywords: Electronic data processing personnel -- Certification; Internet telephony -- Examinations -- Study guides; Convergence (Telecommunication) -- Examinations -- Study guides