| 摘要 |
System and method for establishing a voice or data communication in a Internet Protocol (IP) communication network (1) especially for VoIP the network comprising a gateway (13,23) for interconnecting PSTN telephones to the IP network and at least one call server (15,24). In case of failure in the communication link between the gateway (13) and the call server (14) using SIP, the gateway initiates an alternative signalling procedure by means of a peer-to- peer communication link for establishing communication, through an alternative communication link with a node (40), said node being adapted to redirect the communication to a destination terminal (21,43) thus enabling communication even though there is a fault in the network.
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