Hi there,
Once again, thank you all for your reply's.
Well, this unit was a stack member and was removed from it due to infrastructure upgrade. He keeps the settings it had when it was in the stack.
My company gave me the equipment, but now I can not access it in order to make its reconfiguration in order to serve my needs.
I am sure that this is not a terminal settings or cable problem, because both work fine on other equipment.
Best Regards