A call from a calling party (12) is routed to at least one called party (14, 16, and 18) in accordance with the network preference of the calling party while taking into account the network capability of the called party. The calling party initiates an attempt to the called party over a preferred network...http://www.google.fr/patents/US6907031?utm_source=gb-gplus-shareBrevet US6907031 - Customer premises equipment call re-routing technique
