H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/26 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2133733
ABSTRACT OF THE DISCLOSURE The present invention relates to a method for avoiding the use of specially allocated, temporary roaming numbers in a mobile telephone system for routing outside calls to a mobile subscriber roaming in the system. According to the invention, an incoming standardized call signal frame comprising a first parameter field (called party address) including a directory number is reconstructed. The directory number in the first parameter field is replaced with the unique routing number of the mobile telephone switching centre within whose service area the mobile subscriber roams. A unique international mobile subscriber identity and the directory number are inserted in a second parameter field. This implies a static addressing principle in which the routing address will also contain directly the number of the called subscriber. This facilitates restoration of certain registers after a failure.
Astrom Bo Arne Valdemar
Gandils Mats Werner
Lantto Sven Jorgen
Peltonen Ari
Stille Mats Ola
Marks & Clerk
Telefonaktiebolaget Lm Ericsson
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