Toshiba GD-1210 Operator's Manual page 158

7 REGISTERING AND SETTING ITEMS
5
Press the [TERMINAL ID] button.
6
Press the [ID NAME] button and enter the ID name in the letter entry
screen (up to 20 characters). When you have finished entering the
letters, press the [ENTER] button.
Entering letters, see the [Operator's Manual for Basic Function].
7
Press the [FAX NUMBER] button.
156 Registering the Terminal ID