5-Understanding of key network interfaces: A, Iu-CS, MAP, CAP, SIP, DIAMETER, ISC, Rx, Cx, Sh, Ut, Gm, Mw, Mg, etc. 6-Huawei: MSC/MSC-S, MGW, IMS, SBC (USN9810, UMG8900, IMS9000, etc.) 7-CS Core: MAP, ISUP, BICC, SIP-I, SCCP, CAP 8-IM... -
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