In a network for reliable transfer of packets from a transmitter to a receiver using a Real-time Transport Protocol (RTP), a system for packet recovery, the system comprising a detection block (detector) for packet loss detection and a probe device (probe) for lost packet retransmission, wherein the detector is configured to send a packet retransmit request to the probe upon detecting a packet loss (a lost packet), and wherein the probe is configured to store received packets and retransmit the lost packet responsive to the retransmit request.