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    • 4. 发明公开
    • NETWORK CALL TRACE
    • 网络呼叫跟踪
    • EP1036461A1
    • 2000-09-20
    • EP98961925.9
    • 1998-12-04
    • Ericsson, Inc.
    • WONG, PingTOVANDER, Lars, A.
    • H04M3/22H04M3/42
    • H04M3/2281H04M3/08H04M7/06H04M2207/12
    • A Network Call Trace (NCT) method and system enables a call path route to be traced in a telecommunications network. A Type of Digit (TOD) in the Generic Digits Parameter (GDP) for an Integrated Services Digital Network (ISDN) User Part (ISUP) command can be utilized to realize the NCT. A listing of Switch IDs (SIDs) from the originating subscriber's switch to the terminating subscriber's switch is provided so that routing inefficiencies can be discovered. In one embodiment, an Initial Address Message (IAM) is transmitted with a TOD Network Call Trace in the GDP. The NCT includes the SID of the originating switch. Any intermediate switches between the originating switch and the terminating switch likewise append their own SID onto the NCT list of SIDs. Finally, the terminating switch also adds its SID onto the end of the NCT list. This NCT list may then be transmitted and displayed for analysis. For example, it may be transmitted in a backward message such as address complete message (ACM), answer message (ANM), call progress (CPG), or release (REL) back to the originating switch via the network. Alternatively, the NCT list may be sent to a Network Management Center.
    • 网络呼叫追踪(NCT)方法和系统使得能够在电信网络中追踪呼叫路径路由。 用于综合业务数字网(ISDN)用户部分(ISUP)命令的通用数字参数(GDP)中的数字类型(TOD)可用于实现NCT。 提供从始发用户交换机到终端用户交换机的交换机ID(SID)列表,以便发现路由低效率。 在一个实施例中,初始地址消息(IAM)与GDP中的TOD网络呼叫追踪一起被发送。 NCT包括始发交换机的SID。 始发交换机和终端交换机之间的任何中间交换机同样将它们自己的SID附加到SID的NCT列表上。 最后,终端交换机还将其SID添加到NCT列表的末尾。 这个NCT清单然后可以被传输并显示用于分析。 例如,它可以通过网络在诸如地址完成消息(ACM),应答消息(ANM),呼叫进程(CPG)或释放(REL)之类的后向消息中发回到始发交换机。 或者,可以将NCT列表发送到网络管理中心。