While on a PSTN call you may receive a Skype call, or while on a Skype call you may receive a PSTN call. You'll hear an
audible call waiting tone that indicates an incoming call.
To put the current call on hold and answer the incoming call, dial: # 1
To terminate the current call and answer the incoming call, dial: # #
To switch between an active call and a call on hold, dial: # 1
Note: If you have customised your General settings for the USB Telephone Adapter, the key sequences for call waiting may be different.