This sets the maximum response time, in tenths of a second (default 10, i.e. 1 second), inserted into group-specific queries sent after a leave message, and also the repetition rate for the robustness-count retransmissions of that query, per ITU-T G.988 9.3.27. Admins lower it to make channel changes feel faster by confirming a leave more quickly, at the cost of slightly more signaling. For example, this setting directly controls how quickly the ONU stops forwarding a stream after the last viewer's set-top box sends a leave.