I've inherited support for a Vodavi STSe phone system.

I've figured out how to change the menu recordings, but I need to know how to change what numbers do what

Example:
Pressing 1 goes to station 101. I need it to go to station 100.

Is there a way I can do that from a phone or am I going to have to get connected via computer somehow?

Also, is there a way to change a stations number? Like if I want to make station 104 become station 100?