This counts SCTP associations that reached ESTABLISHED because the remote endpoint initiated the connection (this device was passively listening), the mirror image of cSctpActiveEstabs. On a device acting as a signaling server accepting connections from many remote clients, this counter climbing steadily while cSctpActiveEstabs stays near zero confirms the device's role as a passive listener rather than an active initiator. A sudden drop in this counter's growth rate, with client complaints of failed connections, would point to something blocking new inbound SCTP associations, such as a firewall change or the cSctpMaxAssoc ceiling being hit.