A Method for providing a trusted feedback (8, 80) in an access network (1) is described, wherein a real time service monitor (7, 70) for real time monitoring the quality of service provided to at least one user (4, 40) by a server (3, 30) via the access network (1) is placed in an access multiplexer (2, 20) being the last part of the access network (1) towards the user (4, 40), wherein the real time service monitor (7, 70) is sending a trusted feedback signal (8, 80) from the access multiplexer (2, 20) at least back to the server (3, 30), which signal (8, 80) comprises real time information about the quality of service passing through the access multiplexer (2, 20), plus an access network (1) comprising at least one data link connecting at least one access multiplexer (2, 20) being the last part of the access network (1) towards at least one user (4, 40) with a core network or at least one server (3, 30) providing a service (6, 60) to the user (4, 40) connected to the access network (1) via the access multiplexer (2, 20) is described, wherein a real time service monitor (7, 70) is arranged in the access multiplexer (2, 20) providing real time monitoring of the quality of service passing through the access multiplexer (2, 20), wherein the real time service monitor (7, 70) provides a trusted feedback signal (8, 80) to the server (3, 30) comprising information about the quality of service in real time, plus an access multiplexer (2, 20) adapted to receive a multimedia signal (6, 60) from a multimedia provider (3, 30) and to forward at least part of said multimedia signal (6, 60) to at least one user (4, 40) is described wherein said access multiplexer (2, 20) comprises a real-time service monitor (7, 70) adapted to collect information about the multimedia signal (6, 60) passing the access multiplexer (2, 20) and being transmitted between said multimedia provider (3, 30) and a particular user (4, 40).