If you can not connect to NE because you forget the IP address of this SCC you can use this method for reseting the IP.
The Method for restoring the default IP address is as follows:
Press the LAMP button on the SCC board and hold it for five to ten seconds.
Then, release the button and wait for five to ten seconds.
Press the button for five to ten seconds again.
Release the button and wait for five to ten seconds again.
Press the button the third time.
In this manner, the IP address of the equipment can be restored.
There is no time restriction on the third time you press the LAMP button.
The default IP address is 188.8.131.52.
Afterwards you can connect with Navigator and change the IP to your requirement.
It is a very useful procedure, I had to use it at several customers already because they forgot the IP or changed it to another and the NE didn't react anymore to the changed IP address.