With IPHost Network Monitor you can run simple snmp requests against a ADTRAN device in your network.
adTSUIQIntDBUEncapsulationErrors
ad TSUIQ Interval DBU Encapsulation Errors
1.3.6.1.4.1.664.2.147.11.1.1.20
Number of frames destined for the IQ IP stack with that does not meet the FRF.3 IA.
Back to ADTRAN-TSUIQ-MIB MIB page.
IPHost Network monitor allows you to monitor adTSUIQIntDBUEncapsulationErrors on ADTRAN device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring ADTRAN routers right now.