System and method for implementing block service of circuit field terminal access packet network
A packet network and terminal access technology, applied in the field of communications, can solve the problem that the IMS network cannot provide analog services for circuit domain terminals, and achieve the effects of protecting investment costs, reducing management and maintenance costs, and reducing investment costs.
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[0068] The present invention will be further elaborated below in conjunction with accompanying drawing and specific embodiment:
[0069] FIG. 2 is a system architecture diagram of the SIMULATION service provided by the IMS network to CS domain terminals. As shown in the figure, a traditional circuit domain terminal accesses an IMS network through a signaling access adaptation entity. Traditional circuit domain terminals include PSTN and ISDN terminals; IMS network includes interconnected IMS core network and IMS application server; IMS core network is the IMS core network defined by standard organizations such as 3GPP or TISPAN or ITU-T, and IMS application server is 3GPP The IMS application server defined by standard organizations such as , TISPAN, and ITU-T is connected to the I / S-CSCF (Inquiry / Service Call Session Control Function) through the ISC interface to provide the control function of the IMS SIMULATION application service.
[0070] The signaling access adaptation e...
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