ESTABLISHING A TELEPHONE CALL WITHOUT DISCLOSING THE CALLED PARTY'S TELEPHONE NUMBER

摘要

The subject of the invention relates to a procedure for establishing a telecommunications link directed between a caller (10) and the called party (20) during which through the call-initiating communication unit (11) belonging to the caller (10) the identifying data of the called party (20) is fed into the telecommunications network (30), following this the identifying data of the called party (20) is sent to the connection centre (40) with the help of the input branch of the telecommunications network (31) the identifying data of the called party (20) is read in the connection centre (40), evaluated and on the output branch of the telecommunications network (32) directed towards the called party (20) an information-forwarding channel is made to the call-receiving communication unit (21) of the called party (20), and so the telecommunications link is established in this way. The characteristic feature of the procedure is that before establishing the telecommunications link an identifying centre (50) is established consisting of memory registers (51) and the identifying centre (50) is supplied with a piece of individual identifying data (52), the called party's (20) own telephone number (22) is stored in a memory register (51) in advance directly or with the intervention of a mediating unit, where it is stored; the memory register (51) is given a piece of internal identifying data (53) and henceforward the called party (20) is identified with the identifiying data (23) formed from the piece of individual identifying data (52) of the identifying centre (50) and the internal identifying data (53) of the memory register (51), during the establishment of the connection the identifying data (23) arriving at the connection centre (40) from the caller (10) relating to the called party (20) is interpreted, with the help of the piece of individual data (52) the identifiying centre (50) is selected, while on the basis of the piece of internal identifying data (53) the contents of the memory register (51) of the identifying centre (50) are retrieved and fed into the connection centre (40), then the telecommunication link between the caller (10) and the called party (20) is realised with the help of the fed in telephone number (22).