If you start a call and have not defined a standard line, the call is always started on the next free line. However, if you have assigned a specific number (e.g. a group number) to a line, you can choose a specific line for the next call and thereby signal a specific number to the destination subscriber. For information about assigning a number to a line button, see 5.2.2 Configuring a Line Button.
To call a subscriber using a specific line
1 Click on and select the line you would like to use to place a call.
The line is activated.
2 Enter the number in the input field using the keyboard, and click on .
The number will be dialed at once.
Or
1 Open the call control window.
2 Enter the number in the input field (using the keyboard).
3 Click on the line you would like to use to place a call.