Method of controlling auxiliary services in communication network, control unit and communication unit

摘要

A method provides that an initiating message is sent from a first service switching unit to a service control unit assigned to a supplementary service. In the service control unit there then takes place a comparison of a protocol supported by the first switching unit with a protocol necessary for the requested supplementary service. According to the result of the comparison, a second service switching unit, which can support the protocol necessary for the requested supplementary service, is determined, and a rerouting to the service switching unit is initiated.