With IPHost Network Monitor you can run simple snmp requests against a ADTRAN device in your network.
adGenAOSnmTwRemoteSyncState
Adtran Gen AOS Network Monitor Tw Remote Sync State
1.3.6.1.4.1.664.5.53.2.2.6.1.7
If return value is true, remote clock is in sync.
Back to ADTRAN-AOS-NETWORKMONITOR MIB page.
IPHost Network monitor allows you to monitor adGenAOSnmTwRemoteSyncState on ADTRAN device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring ADTRAN IP phones right now.
