【摘要】 VoIP正以全新的面貌出现在传统电信行业和世人面前.它经历了萌芽期、发展期将走向成熟期,已受到各国电信部门和厂商的重视.VoIP系统由网关、关守及管理系统构成,其典型的网络应用方案分企业级和电信级两种.VoIP技术要考虑时延、话音处理、网络设计及相关协议等几方面,该系统还面临计费、产品互通等问题.更多还原

【Abstract】 VoIP system is composed of gateway, gatekeeper and management system with the typical network application of enterprise-level solution and carrier-level solution. VoIP technologies involve time delay, voice processing, network designing, related protocols and other aspects, while the system is faced with problems of billing and products inter-working.更多还原