The official study guide helps you master all the topics on the CCNA Voice exam, including: Voice and data convergence IP phone connections to the LAN infrastructure Cisco Unified Communications Manager ExpressCUCM Express IP phone configuration and voice productivity features Gateways and trunks Cisco Unity ExpressSmart Business Communications SystemUC500 series for voiceCCNA Voice 640-461 Official Cert Guide is part of a recommended learning path fro CCNA Voice 640-461 - Jeremy Cioara, Michael Valentine od authora Jeremy Cioara, Michael Valentine a nakladatelství za skvělé ceny na e-shopu Martinus. cz.