CNS 14211-1998 Broadband-ISDN Interworking between signalling system no 7 broadband ISDN user part (B-ISUP) and digital subscriner signalling system no 2 (DSS2)《宽频整体服务数字网络–第七号信号系统之宽频整体服务数字网络使用者部与第.pdf

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