| 摘要 |
The invention provides a method and a system for selectively delivering information to callers in an AIN environment. In accordance with the method the service switching point to which is connected the terminal equipment of the caller monitors the condition of the telephone line to detect an AIN trigger, such as an off-hook event among other possibilities. When such event occurs, the service switch point formulates a message query. The query is routed to a service control point via one or more service transfer points, that holds knowledge of the service subscribed by the caller and the information to be displayed for this service. The service control point analyzes the request and assembles the appropriate response. That response is then returned to the service switch point that formats it properly and delivers it to the terminal equipment of the caller. In one embodiment the information delivery is effected during call establishment. In a variant, information is delivered while no call is being attempted.
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