Button Description Lamp IndicationSimultaneousRing *1Enables parallel ringing. Up to 10locations can be specified to ringsimultaneously when you receive acall.Note• It is necessary to set the XSIfeature to enable (→ see[Enable Xtended Service] and[Server Address] in4.3.7 Xtended ServiceSettings in the Web userinterface or "XSI_ENABLE" and"XSI_SERVER" in 5.3.11 XSISettings in the configurationfile).Off: Simultaneous Ring offBlue on: Simultaneous Ring onHoteling(Hospitality) *1Used to log in/log out of the CallCenter Hoteling Event.Note• It is necessary to set theHoteling (Hospitality) feature toenable (→ see [Enable CallCenter] and [Hoteling Event]in 4.3.11 Call Center Settings[Line1]–[Line16] in the Webuser interface or"CALL_CENTER_ENABLE_n"and "CC_HOTELING_EVENT_n"in 5.3.14 Call Center Settingsin the configuration file).-Transfer Used to transfer a call to the assignedextension in the key with confirmation,during a conversation.-Blind Transfer Used to transfer a call to the assignedextension in the key withoutconfirmation, during a conversation.-Conference Used to establish a multiple-partyconversation (conference). -Directed CallPickupUsed to answer an incoming callarriving at the specified telephonenumber.-Call Park *1 Used to transfer a call to Call Parking. -Call ParkRetrieve*1Used to retrieve a parked call (CallParking). -6.3 Flexible KeysDocument Version 2016-05 Administrator Guide 317