Adtran 908e SIP registration question

[TIgerV]

I have a 908e, with an outbound connection to a SIP provider (frontier).
I have configured it (no guides from them), but would like to know if the trunk is registering. They won't tell me- which is yet ANOTHER reason I don't want to use frontier for this project.
Regardless, Reports-Sip Registrations shows INBOUND registrations, but not the status of the SIP trunk.
Sip Trunk shows "AVAILABLE", but it also shows that when I delete the password for the trunk, so it's not accurate either.
How can I tell if the SIP trunk is authenticated and registered with the provider from the Adtran interface?

 

[Wanet Telecoms Ltd]

Why dont you confirm by attempting to make calls either inbound or outbound