When you SSH’d into the ONT were you still hooked up to the PON / in operation state 5? Presumably they use the same IP and username and passcode as the sticks?
The donor I acquired, opened up and connected to its console, just UART serial. Still had default Huawei credentials. Once firewall disabled could then log in using the same details and default IP address.
The newer kit is just logged into as a web console. It has no concept of routing the management traffic so you have to be connected to the same subnet but log in and you can change the serial number freely from the GUI.
EDIT: I can log in freely to the newer model, the firewall is a part of the customisations for BT in their own model. As it's dead equipment now no-one cares. The ONT reports the right things at the right time to the OLT, harms no-one and does no damage.
It was only required due to errors with the PON deployment here. For the cost of about £100 in ONTs and patch cabling it was a quite interesting intellectual exercise too.
Edited by CarlTSpeak (Sat 01-Jan-22 14:31:59)