With IPHost Network Monitor you can run simple snmp requests against a ADTRAN device in your network.
adUnitUserIpAddr
ad Unit User Ip Address
1.3.6.1.4.1.664.5.30.2.2.1.1.7
If not null, the only IP address (or hostname) from which the specified user may initiate a telnet access.
Back to ADTRAN-ADUNIT-MIB MIB page.
IPHost Network monitor allows you to monitor adUnitUserIpAddr 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.