Switch between Lines
You can switch between your lines. If you have a call on a line and switch to another line, your call will be held. The subscriber will hear music on hold.
Switching between different lines is also called Call Swap.
Switch between LinesĀ 
If you have two connections, you can switch between the active connection and the connection on hold.
The active line is indicated by the green line key . The line on hold is indicated by the red line key .
1 Click on the line with the held connection .
*The active call is now on hold and the previously held call now becomes active.