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1. (WO2017148631) METHOD FOR CALL ESTABLISHMENT

Pub. No.:    WO/2017/148631    International Application No.:    PCT/EP2017/051752
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Jan 28 00:59:59 CET 2017
IPC: H04M 3/42
Applicants: DIGITAL PRIVACY GMBH
Inventors: WALTER, Michael
Title: METHOD FOR CALL ESTABLISHMENT
Abstract:
The invention relates to a method for call establishment from a subscriber (1) having a first caller line identification (CLI1) to a mobile station (2), to which a first telephone number (B) is assigned in a first mobile radio network (6), comprising: storing an association (9) between the first telephone number (B) and a second telephone number (VBn), which is assigned in a second mobile radio network (5), in a service node (7) of the second mobile radio network (5); receiving a first call (10) in the second mobile radio network (5), said call being targeted to the second telephone number (VBn) and containing the first caller line identification (CLI1); determining the first telephone number (B), which is assigned to the second telephone number (VBn), from the stored association (9) and generating a second caller line identification (CLI2) comprising a network prefix (MNVB) of the second mobile radio network (5) and the first caller line identification (CLI1); and establishing a second call (13) from the second mobile radio network (5) or a further mobile radio or fixed network (5''') to the mobile station (2) addressed by the first telephone number (B) and connecting the first call (10) to the second call (13), wherein the second caller line identification (CLI2) is also transmitted in the second call (13).