Importance

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Abstract

A virtual connection (V) is pre-set from an originating to a destination ATM communication terminal equipment (KE(1),KE(2)) in an ATM communication network (KN) such that administration and maintenance cells (oam) can pass the preset connection (V). An administration and maintenance cell (oam1) is subsequently transmitted from the destination to the originating ATM communication terminal equipment (KE(2),KE(1)). An administration and maintenance and a through-connect information (oam3,di) inserted into the administration and maintenance cell (oam1) effect an immediate through-connect of the pre-set virtual connection (V) in the ATM communication systems (KS1,2) involved in the virtual connection (V). Alternatively, a known method for setting up and clearing down virtual connections can be incorporated into the method. As a result of the immediate through-connect, the 'speech clipping' caused by a delayed through-connect due to signalling processing times is avoided, especially given telephone connections conducted via a plurality of ATM communication systems (KS).

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First Claim