Thank you for posting in the support community. I'm not sure I follow this question, when I combine it with your previous post. What is the overall goal you are attempting to achieve with this application? It appears you want the unit to reboot when the cable modem is rebooted. Is that correct?
The Network Monitor feature of AOS, that you mentioned previously, is typically used with probes/tracks to failover to another Internet connection. You stated you have ADTRAN 2140s, which is not a product I'm familiar with. Is it possible these units are actually NetVanta 2054s? If they are NetVanta 2054s, then those platforms do not support the Network Monitor feature.
When you get a chance, can you reply with additional information? We will be happy to assist you in any way we can.
I went ahead and flagged the "Correct Answer" on this post to make it more visible and help other members of the community find solutions more easily. If you don't feel like the answer I marked was correct, feel free to come back to this post to unmark it and select another in its place with the applicable buttons. If you have any additional information on this that others may benefit from, please come back to this post to provide an update. If you still need assistance, we would be more than happy to continue working with you on this - just let us know in a reply.