Call-Waiting can be enabled or disabled in the menu of your handset, please refer to the phone’s manual.
When the call-waiting feature is activated, the active call can be placed on hold while another incoming call can be picked up. After finishing the conversation the user can return to the first call. Moreover, it is possible to place the active call on hold, dial another number and after talking come back to the first call. Please note that if the feature is active and the user places the call on hold, both calls will be billed: the one that is active and the one that is placed on hold.