Lines Telephony Functions Use of a specific line (Signaling of the respective number) Selection of a specific line for one call
 
Selection of a specific line for one call
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 Configuring a Line Button.
This is how you call a subscriber using a specific line
1 Click on the Line Button of 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). The number will be dialed at once.
Or
1 Enter the number in the input field (using the keyboard).
2 Click on the Line Button of the line you would like to use to place a call. The call will be started.