Beijing University of Posts and Telecommunications and Soft Switch stresses, pdf format, it is true that we used to study the common

Packet : 115157688softswitching1.rar filelist
第五讲 接入网关技术.pdf
第一讲 下一代网络概述.pdf
第二讲 下一代网络的体系结构.pdf
第三讲 媒体网关技术.pdf
第四讲 信令网关技术.pdf

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