Is to call the maker of the thing (you didn't tell what the things are) and ask how to reset.
I realize you are in a panic but think about members here and if they have enough detail to help you out.
Please help me , i have a modem and its port are in mode bridge by mistake ,i lost the access to it and i can not do ping to its interfaces .
How can i recovery the access . Please help me as soon as possible urgently.