Patent ID: 6370232
Filing Date: 2002-04-09
Classification: H04L,H04Q

Abstract:
Procedure for ensuring emergency communication in a data communication network comprising a number of telephone exchanges interconnected via trunk cables and an access node which is connected to at least one of the exchanges and to which are connected a number of terminal devices used by subscribers to set up connections via the data communication network, in which procedure signalling according to the V5 standard is used in the connection between the access node and the telephone exchange, which connection is an access node V5 interface consistent with the V5 standard, whereinin the event of a failure of the V5 interface used by the subscriber, a new V5 subscriber address is allocated for the subscriber from a set of V5 subscriber addresses created beforehand in the access node for a separate V5 interface with no subscribers connected to it; this new V5 subscriber address is used for connection setup; and the V5 subscriber address is released after disconnection of the connection.