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

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

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