With IPHost Network Monitor you can run simple snmp requests against a ADTRAN device in your network.
adNCmdMspDiskUsage
ad N Cmd Msp Disk Usage
1.3.6.1.4.1.664.1.1115.1.12
Server's disk usage
Back to AdnCommandMSP MIB page.
IPHost Network monitor allows you to monitor adNCmdMspDiskUsage on ADTRAN device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring ADTRAN switches right now.