17 IMS and Signaling Translation All signaling converted from circuit to IP at the edges –Integrated Approach: Convert SS7 ISUP, PRI, CAS directly to SIP –Follows TS which is based on ITU-T Q –Distributed Approach Signaling GW: Convert SS7 ISUP and PRI to run over IP –Use the SIGTRAN suite of adaption layers that run over SCTP »For example, ISUP runs over M3UA Media Gateway Control Function –Terminates SS7 over IP and converts to SIP
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