ISDN user network interface specification third tier basic call control. Rar

Packet : 107215779isdn.rar filelist
ISDN用户网络接口规范 第三层基本呼叫控制
ISDN用户网络接口规范 第三层基本呼叫控制\ISDN用户网络接口规范 第三层基本呼叫控制.pdf

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