You can use the Hold function to put the currently active call on hold, for example if you want to make an a consultation call or start a second call. When a call is on hold, the other party hears music on hold and the symbol on the line changes accordingly.
To put a telephone call on hold
You are having a telephone conversation on a line.
1 Click on or on the line button.
The call is put on hold.
or
1 In the call control window, right-click on the line key on which you are making the call.
2 In the context menu of the line, choose the option Hold.