IP telephony gateway—solution for telecom switches

1. An interface establishing device for providing an interface between a first network and a second network,

wherein said interface establishing device is adapted to receive data from said second network by using signalling associated with said second network and to transmit said data to said first network by using signalling associated with said first network,

wherein said interface establishing device is configured to receive control software for said interface establishing device from a network control device via said first network and is configured such that parameters thereof are controlled by said network control device,

wherein said interface establishing device is connectable to a switch device adapted for controlling said second network, said switch device includes at least one connecting means for connecting an exchange terminal for a trunk line,

wherein said interface establishing device is adapted to be connected to one of said connecting means in place of said exchange terminal.

2. The interface establishing device according to claim 1 , wherein said interface establishing device is adapted to receive control signals from said network control device being remotely located from said interface establishing device.

3. The interface establishing device according to claim 1 , wherein said connecting means is a slot, and said exchange terminal and said interface establishing device are constructed as plug-in-units such that both said exchange terminal and said interface establishing means can be inserted in said slot.

4. A network system comprising:

an interface establishing device, wherein said interface establishing device is adapted to receive data from said second network by using signalling associated with said second network and to transmit said data to said first network by using signalling associated with said first network,

wherein said interface establishing device is configured to receive control software for said interface establishing device from a network control device via said first network and is configured such that parameters thereof are controlled by said network control device, and

wherein said interface establishing device is connectable to a switch device adapted for controlling said second network, said switch device comprises at least one connecting means for connecting an exchange terminal for a trunk line,

wherein said interface establishing device is adapted to be connected to one of said connecting means in place of said exchange terminal,

wherein said data transfer is supplied from a second network via said switch device adapted to control said second network and said interface establishing device connected between said switch device and said first network; and

a network control device for controlling data transfer in a first network,

wherein said network control device controls said interface establishing device by using signalling associated with said first network, and controls parameters of said interface establishing device,

wherein said network control device loads control software for said interface establishing device via said first network into said interface establishing devices.

5. The network system according to claim 4 , wherein said network control device controls a plurality of switch devices and interface establishing devices via said first network.

6. The network system according to claim 4 , wherein said first network is an IP based network and said second network is a switched circuit network.