国家邮电部程控交换标准之－－本地电话网用户线路工程设计规范YD 5006-2003
Ministry of Posts program- control standards-- the local telephone network subscriber line engineering design specifications YD 5006-2003 (2006-03-01, Windows_Unix, 2886KB, 下载12次)
隆重推出NO.7信令系统(SS7)之国家标准（中文）—— 中国国内电话网NO.7信号方式测试规范和验收方法
grand launch Signaling System No.7 (SS7) of the national standard (English)-- China's domestic telephone network No.7 signal testing standards and the method (2006-02-28, Windows_Unix, 5409KB, 下载35次)
隆重推出NO.7信令系统(SS7)之国家标准（中文）—— NO7-信令连接控制部分(SCCP)
grand launch Signaling System No.7 (SS7) of the national standard (Chinese)-- nr 7-signaling connection control part (SCCP) (2006-02-28, Windows_Unix, 106KB, 下载64次)
隆重推出NO.7信令系统(SS7)之国家标准（中文）—— NO7-综合业务数字网用户部分ISUP(补充) ydn038.1
grand launch Signaling System No.7 (SS7) of the national standard (Chinese)-- nr 7-integrated business Digital Network User Part ISUP (supplementary) ydn038.1 (2006-02-28, Windows_Unix, 677KB, 下载33次)
隆重推出NO.7信令系统(SS7)之国家标准（中文）—— NO7-综合业务数字网用户部分ISUP ydn038
grand launch Signaling System No.7 (SS7) of the national standard (Chinese)-- nr 7-Integrated Services Digital Network User Part ISUP ydn038 (2006-02-28, Windows_Unix, 4557KB, 下载44次)