实施思科统一通信 IP 语音和 QoS (Cvoice) 基础学习指南：(CCNP Voice CVoice 642-437)（第 4 版）（基础学习指南）作者：Kevin Wallace
原名:Implementing Cisco Unified Communications Voice over IP and QoS (Cvoice) Foundation Learning Guide: (CCNP Voice CVoice 642-437) (4th Edition) (Foundation Learning Guides) ...