This sets, when acting as an IGMP server, the maximum time in seconds it allows for hosts to respond to a membership query before deciding no one answered. This value works together with cdmipIgmpQueryPeriod and cdmipIgmpMaxMissBeforeDrop to determine how quickly a genuinely-abandoned multicast group actually gets dropped versus how much slack is given for a host that is just slow to respond over a high-latency satellite path. Setting this too short, say 2 seconds, on a satellite link with significant round-trip latency risks the modem deciding no host responded even though a response is still in flight, prematurely dropping an active group.