Patent ID: 7420928

Claim:
A method for checking a transmission quality between a first gateway and a second gateway in a packet network which is effectively connected to at least one packet-based switching system, the method comprising: performing first method steps, comprising: setting up a connection between a resource server and the first gateway by the packet-based switching system, the second gateway not included in the connection; transmitting test information via the connection to the first gateway from the resource server; looping back the test information in the first gateway; transmitting back the looped-back test information to the resource server; and evaluating the looped-back test information with regard to criteria relating to the transmission quality; performing second method steps, comprising: setting up a connection between the resource server and the second gateway by the packet-based switching system, the first gateway not included in the connection; transmitting test information via the connection to the second gateway from the resource server; looping back the test information in the second gateway; transmitting back the looped-back test information to the resource server; and evaluating the looped-back test information with regard to criteria relating to the transmission quality; performing third method steps, comprising: transmitting test information from a director function arranged in the resource server via the first gateway and the second gateway to a responder function arranged in the resource server by setting up a connection between the resource server and the first gateway by the packet-based switching system, and by setting up a connection between the first gateway and the second gateway by the packet-based switching system, and by setting up a connection between the second gateway and the resource server by the packet-based switching system; transmitting test information via the connections set up from the resource server to the first gateway, from the first gateway to the second gateway and from the second gateway to the resource server; and evaluating the test information received with regard to criteria relating to the transmission quality; and combining the results of the first, second, and third method steps for checking the transmission quality on the transmission section between the first gateway and the second gateway.