Thank you for asking this question in the support community. Unfortunately, ADTRAN does not support Remote Network Monitoring (RMON), currently. However, we do have some similar features which can be found in the Configuring Network Quality Monitoring (NQM) in AOS document. This document reviews network monitoring probes and tracks, as well as two-way active measurement (TWAMP) probes.
Please, do not hesitate to reply to this post with any additional questions.