International Business Machines Corporation

Comptel Oyj

Massimo Nardone

Anders Westberg

Rolf Kalland

A system and method of accessing a service on a terminal node. The system includes a chain of nodes, the chain comprising a first node, one or more intermediate nodes, and the terminal node, the terminal node maintaining the service, wherein the first node is arranged to initiate an access request and to transmit the access request to an adjacent node, each intermediate node is arranged to authenticate the transmitting node and to transmit the access request to an adjacent node, and the terminal node is arranged to authenticate the transmitting node and to execute the access request.

Node authentication

The invention includes method for monitoring and/or limiting the use of a data communications connection subject to payment between IP clients in a packet-switched connection network, in which method the operator terminal, such as a SIP system, of the signalling channel of the connection station of the client is set to control a traffic limiter, such as a firewall in the operator's traffic-relaying system between the source terminal and the destination terminal. The invention also includes a system for limiting the use of a data communications connection subject to payment, between IP clients, in a packet-switched connection network and a computer software product for limiting the use of a data communications connection subject to payment, between IP clients, in a packet-switched connection network.

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Helsinki, Finland

Massimo Nardone