Patent ID: 6351470
Filing Date: 2002-02-26
Classification: H04L,H04Q,H04W

Abstract:
A method and arrangement for establishing a mobile-terminating call in a mobile communications network when the call is received from a calling party via a fixed network without any signalling support carrying information on a protocol employed by the calling party, comprising:receiving a call to a directory number of a subscriber, said directory number being assigned to a data service employing two or more alternative protocols for a fixed network, retrieving from subscriber data a service definition linked with said directory number, a protocol parameter of said service definition having a neutral value or a value that is interpreted as neutral, assigning an interworking function resource in accordance with said service definition, omitting the definition of a protocol due to said neutral value or the value that is interpreted as neutral, monitoring by the assigned interworking function resource a traffic channel received from the fixed network, identifying the protocol employed by the calling party on the basis of signalling characteristic thereof, and configuring said assigned interworking function resource to employ said identified protocol for said calling party.