Fig. 29. SI functional architecture for a circuit-switched network.
Fig. 29 illustrates the SI functional architecture for a circuit-switching network that does not support packet data transmission. In this case, SI server interacts with network control equipment via an open interface of OSA/Parlay type.
This makes the SI service space available for circuit-switched network nearly the same as for packet-switched one. Thus, the SI technology allows a significant raise of the service level available in circuit-switched networks.
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