Recovery of lost revenue in prepaid calls

A method for determining a charge for a prepaid call in a telecommunications network, comprising:

• receiving, at a service control point, a first signal indicative of a trigger detection point associated with a prepaid call in a telecommunications network, the trigger detection point being configured to control processing of the prepaid call if a signal associated with the call is not received;
• receiving, at the service control point, a unique call identifier associated with the call;
• receiving, at the service control point, a signal indicative of a first time value, said first time value being indicative of a time of arming of the trigger detection point;
• receiving, at the service control point, a signal indicative of a second time value, said second time value being indicative of a time of disconnection of the call;
• calculating, at the service control point, a first charge for the call, the first charge being based on said first and second time values;
• and
• associating the first charge with a previously calculated second charge for the call to provide a total charge for the call, the total charge being based on the first charge and the previously calculated second charge.

A method for charging a prepaid call in a CAMEL telecommunications network, comprising:

• receiving, at a mobile switching center, information of a trigger detection point associated with a prepaid call in a CAMEL telecommunications network, the trigger detection point being configured to control processing of the prepaid call if a control signal associated with the call is not received from a service control point;
• transmitting, from said mobile switching center, a unique call identifier associated with said call to said service control point;
• receiving, at said mobile switching center, a signal indicative of an arming of said trigger detection point;
• storing, in memory at said mobile switching center, a first time value of said arming of said trigger detection point and a second time value of a disconnection of the call;
• transmitting, from said mobile switching center to said service control point, a signal indicative of said unique call identifier, said first time value, and said second time value;
• determining, at said service control point, a first charge for said prepaid call, said first charge being based on said first time value and said second time value;
• and
• associating said first charge with a second charge for said prepaid call, said second charge having previously been determined at said service control point, to provide a total charge for said call, said total charge being based on said first charge and said second charge.