System and method of delivering collect calls in a radio telecom

Details System and method of delivering collect calls in a radio telecom System and method of delivering collect calls in a radio telecom

1997-09-20

2000-10-24

Vo, Nguyen

Telecommunications

Radiotelephone system

Special service

455406, 455466, H04B 100

Patent

active

061380067

ABSTRACT:
In a radio telecommunications network, a system and method of informing a called mobile station operating in a visited mobile switching center (V-MSC) 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), a collect call prefix from a calling party and determines from the collect call prefix that the incoming call is a collect call. A collect call indication (CCI) is generated and sent along with the calling number to the V-MSC in a Location Request (LocReq) Invoke message and a Routing Request (RoutReq) Invoke message, 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 sets a collect call flag to ON, stores the calling number in a subscriber record in the V-MSC, and determines whether the mobile station is a digital mobile station. If so, a Short Message Service (SMS) message 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 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 is then reset to OFF in the subscriber record in the V-MSC.

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