When the X16 system comes on line, only extension 301 will register. All other extensions must be

registered using the following programming steps:

1. Press the program button

2. Select the Phone Setup

3. Press the center navigation button

4. Press the down arrow key twice (Extension No.)

5. Press the center navigation button

6. Enter the desired extension number between 302 ~ 399

7. Press the center navigation key

Each extension must have a unique extension number. Therefore, if the system detects that the number

entered is already in use, the display will show “In use”. Please enter a different extension number.