Reference:Administration/Phone/Preferences

• No Call Transfer on Hook-On: By default going on hook or pressing the speaker or the headset key initiates a call transfer when there exist both an active call and a connected call on hold. If this checkmark is set both calls are released when going on hook. A call transfer can be initiated by the R-4 key sequence then ('R' (flash) key immediately followed by the digit 4).
• No Local Conference Tone: By default a conference tone is merged into conversation when a conference is established. Frequency, volume and pattern of this tone depend on the configured dial tone scheme. If this checkmark is set no conference tone is generated when the phone itself establishes a conference.
• No Local Intrusion Tone: By default an intrusion tone is generated to notify the user about a call intrusion. If this checkmark is set no intrusion tone is generated the phone itself.
• Display Name on Pickup/Partner Key: By default the number of the calling/called/connected party is displayed in the label field of a partner or pickup function key. If this checkmark is set the 'Name' attribute from the PBX user object (if available) is displayed instead.