With IPHost Network Monitor you can run simple snmp requests against a ADTRAN device in your network.
adUnitSlotInfoState
ad Unit Slot Info State
1.3.6.1.4.1.664.5.30.5.1.1.9
The state of the card slot. Initially it is empty. When a card is inserted, it becomes occupied, and the Slot Type is determined by the card Product Code. When a card is removed, it changes to virtual, and retains the SlotType characteristics until a different kind of card is inserted, or a different preconfiguration is established.
Back to ADTRAN-ADUNIT-MIB MIB page.
IPHost Network monitor allows you to monitor adUnitSlotInfoState on ADTRAN device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring ADTRAN multiplexers right now.