A METHOD FOR HANDLING CALLS TO A NON-REGISTERED MOBILE SUBSCRIBER IN A MOBILE TELEPHONE SYSTEM

摘要

The invention relates to a method for handling calls to a terminal (MS) in a mobile telephone system of the kind in which the call is handled by an ISUP/IAM message which has a static relationship between the address (PRN) of the visitor location register (GLR-2) in the network in which the terminal roams, and the unique terminal identity (IMSI). If the visitor location register (GLR-2) has no data record relating to the unique identity (IMSI), an attempt is made to collect from the home location register (HLR-1) of the called subscriber the data that is required to complete the connection, this data being stored in the visitor location register (GLR-2). If the attempt is successful and the called subscriber is active, the connection is set up in a known manner with the aid of this data.