RETURN LOOP FOR AN SIP NETWORK

摘要

According to the invention, in a packet transmission network including a monitoring device, at least one monitoring entity, and an associated transfer entity, a control message is transmitted (21) by the monitoring device to the monitoring entity according to an SIP protocol indicating an SIP option that requires a return loop to the monitoring device. A first packet flow is then transmitted (22) to the associated transfer entity, and at least one second packet flow is received via the return loop from the associated transfer entity. Finally, the transmission network can be monitored (23) between the transfer entity and the monitoring device on the basis of a comparison between the first and second packet flows.