With IPHost Network Monitor you can run simple snmp requests against a D-Link device in your network.
ringStationLastExitTime
ring Station Last Exit Time
1.3.6.1.2.1.16.10.2.1.6
The value of sysUpTime at the time the probe detected that this station last exited the ring. If the time is unknown, this value shall be zero.
Back to TOKEN-RING-RMON-MIB MIB page.
IPHost Network monitor allows you to monitor ringStationLastExitTime on D-Link device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring D-Link access points right now.