Patent ID: 7620012

Claim:
A device, for routing traffic between communications terminals, for a traffic router connected via a portion of a transmission network to a radiocommunications network including a call switch, the device comprising: a processor arranged as follows: in an event of first and second up traffic channels being set up between calling and called terminals and said call switch, and first and second down traffic channels being set up between said call switch and said calling and called terminals, to compare selected data conveyed in said first up traffic channel with data conveyed in at least one down traffic channel set up after said first up traffic channel and in a selected time window, and in the event the comparison of said selected data results in a correlation between said data being conveyed in the first up traffic channel and said data being conveyed in the at least one down traffic channel, to instruct said traffic router to route the traffic locally and directly from the first up channel to the second down channel, and from the second up channel to the first down channel, without said traffic being sent to said call switch, wherein said processor is arranged to copy said data for comparison as conveyed by said first up channel and to apply to said copied data a time offset that is selected as a function of go-and-return time for reaching said call switch and returning therefrom, and to compare said copied and time-offset data with the data conveyed by each down channel set up after said first up traffic channel and within said selected time window.