This sets the maximum response time, in tenths of a second, the ONU inserts into general query messages sent to UNIs; a value of 0 tells the ONU to use its own default (often 100, i.e. 10 seconds), per ITU-T G.988 9.3.27. Admins tune it to control how long subscriber devices are given to respond to a membership query before being considered to have left. For example, lowering this value makes the ONU detect an unresponsive multicast client faster.