Abstract: The inventive method allows integrated communications in a telecommunications network, which combines a Mobile Telecommunications Network (PLMN) and at least an other, wired packet switching or circuit switched network (PSTN/ISDN, INTERNET), with a subscriber's Mobile Station (MS) designed to operate in the Mobile Telecommunications Network (PLMN) and a second communication terminal (IP-T; IP-MS; SC-T) of the subscriber designed to operate in the other or one of the other networks PSTN/ISDN, INTERNET and with an extended Mobile Services Switching Center (MSCX) that over a gateway (IP-GW) connects to the packet switching network (INTERNET).

Abstract: The method, message server and the telecommunications network allow to convey messages, particularly short messages, originating in a mobile telecommunications network such as the GSM system and terminating at a recipient application or a related service in an IP network not using the standards of said mobile telecommunications network. The inventive telecommunications network comprises a message server (WAMS) through which messages arriving at a first service centre (SC2) can be routed to a second service centre (SC1) which is connected to the recipient application or the related service. According to the inventive method a virtual mobile station number is established as the address for the recipient application, to which the entire community of short message mobile stations MS can originate messages as it would originate them towards a real mobile station MS.