| 摘要 |
In a radio telecommunications network, a system and method of informing a called mobile station (14) operating in a visited mobile switching center (V-MSC)(13) that an incoming call is a collect call prior to delivering the incoming call to the mobile station. The system obtains in an originating mobile switching center (O-MSC)(11), a collect call prefix (16) from a calling party and determines from the collect call prefix that the incoming call is a collect call. A collect call indication (CCI)(17) is generated and sent along with the calling number to the V-MSC in a Location Request (LocReq) Invoke message (19) and a Routing Request (RoutReq) Invoke message (21), thereby notifying the V-MSC that there is an incoming call for the mobile station and the incoming call is a collect call. The V-MSC (13) sets a collect call flag (23) to ON, stores the calling number in a subscriber record (22) in the V-MSC, and determines whether the mobile station is a digital mobile station. If so, a Short Message Service (SMS) message (34) including the calling number is sent to the mobile station informing the subscriber that the incoming call is about to be delivered and the incoming call is a collect call. If the mobile station is a dual-capable mobile station, a distinctive ringing signal (38) is sent to the mobile station. The incoming call is then delivered to the mobile station, and the subscriber may choose to answer or not. The collect call flag (23) is then reset to OFF in the subscriber record in the V-MSC.
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