Telefonaktiebolaget Lm Ericsson (Publ)

Mirka Elisa Fabritius

Keijo Tapio Laiho

Timo Suihko

Satu Simonen

Mia Lucia Gustafsson

Ky&ouml;sti Toivanen

A method of charging at a mobile switching centre, MSC ( ) of a mobile telecommunications network ( ) in respect of a call initiated by a mobile terminal ( ) registered with the network ( ) and terminating outside of the network. At the MSC ( ) the call is classified, according to the associated A-number and/or the B-number, as corresponding either to a call for which the MSC ( ) is to be the charge determination point or to a call for which the charge determination point is located outside of the mobile telecommunications network ( ). In the event that the call belongs to the latter class, the MSC ( ) receives tariff information from the external charge determination point ( ) and calculates charge information on the basis of the received tariff information. In the event that the call belongs to the former class, the MSC ( ) disregards any tariff information received from an external charge determination point and calculates charge information on the basis of the mobile telecommunications network's own tariff information.

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Helsinki, Finland

Mirka Elisa Fabritius