1.3 Additional/replacement accessoriesPlease contact your Panasonic dealer for sales information.As of April, 2019Accessory item Order number Number of devices that can beconnectedDoor Station(referred to as "doorphone" inthis document)VL-V555 (surface mount)Max. of 2VL-V554 (surface mount)VL-V554U (flush mount)VL-V522L (surface mount)VL-V524 (surface mount)Lobby Station*1 VL-V591Video Intercom System forApartment ComplexesVL-V901 and VL-V700 series Contact your building managerfor more information.Video Intercom System – Lobbystation/DistributorVL-VM series/VL-VM701 Contact your building managerfor more information.Extension monitor VL-MV74*2 Max. of 3 (not including the mainmonitor)Flush mount box (for VL-V524) VL-MB524 –*1 Contact your building manager for more information.*2 Comes in silver and white.Note:R The specifications differ depending on the models of doorphone and lobby station. The following functions are notavailable for the VL-V524 (supplied doorphone), VL-V522L, and VL-V591.– VL-V591: Monitoring the outside with the doorphone (page 13)– VL-V591: Doorphone LED lights' illumination settings (page 19)– VL-V591: Doorphone backlight compensation settings (page 19)– VL-V524/VL-V522L/VL-V591: Wide/zoom settings and zoom position settings (page 11)1.3.1 Compatible Panasonic PBXsThis unit can be used with Panasonic PBXs (page 17). Consult your dealer for more information.Compatible Panasonic PBXs*1– KX-TDA30/TDA100/TDA100D/TDA200/TDA600 series– KX-TDE100/TDE200/TDE600 series– KX-NS300/NS500/NS700/NS1000 series– KX-NSX1000/NSX2000 series*1 As of April, 2019.41. Introduction