Inter-network connection system

DETAILED DESCRIPTION It is an object of the present invention to provide an inter-network connection system that easily carry interconnects signaling networks without a great amount of modifying work.
According to a fundamental aspect of the present invention, there is provided an inter-network connection system for interconnecting a plurality of signaling networks using a common channel signaling system wherein, each of the signaling networks comprises one or more signaling offices; at least one of the signaling offices of the signaling network is chosen as a gateway office by each network; and one or more local signaling networks, comprising by the gateway office of one signaling network and the gateway office of another signaling network to be interconnected, is configured between the plurality of signaling networks.
The inter-network connection between the plurality of signaling networks is accomplished with a local signaling network, which is configured between the signaling networks to be interconnected.
According to another aspect of the present invention, there is provided a signal transmission system for transmitting a signal through a plurality of exchanges wherein an origination exchange sets a destination of the signal to one exchange as a gateway office and transmits the signal.
A tandem office exchange determines and changes the destination of the signal to be next transmitted, and transmits the signal to the next exchange, whereby gateway exchanges change the destination of the signal in sequence and finally transmit the signal to the termination exchange.