First at all, I am relatively new in this area so I hope you will understand if something in my question does not make sense.
Now, my question is this, in a company there is a CISCO voip gateway which model number is: IAD2431-16FXS. Do I need to register the public IP address assigned to it with some company for the people to call us through the internet? If the answer is yes, then I would understand that I need to change it if I move the gateway to antoher IP. I hope someone to help me.
Thanks in advance for your answers.