Panasonic Digital Super Hybrid SystemProduct Description18ISSUE 1 E & O EVolume and LCD Contrast AdjustmentDescriptionThere are different volume control functions available to keysets on a per extension basis. One volume controlfor the speaker, another for the ringer and one for the LCD display contrast.Dual Colour LEDsDescriptionEach exchange line key has a dual colour LED. Red is a busy line and green is the line you are speaking on.When a key is assigned as a BLF these dual colours are also utilised to indicate busy extensions, extensionsthat are in a DND mode, and extensions that are in a call forward mode.BenefitsLets you know which line you are talking on, especially when a call is put on hold.When a call is transferred to another extension, in addition to ringing, the line will also flash green indicatingwhich line is being transferred.Applications include manager /secretary operation.Microphone MuteDescriptionUsers have the ability to switch off their microphone for privacy.BenefitsTo ensure privacy while using the speakerphone.Doorphone InterfaceDescriptionA door-phone can be attached, which may be set to ring on any combination of extensions. The KX-T206E canalso support a relay to control a door release mechanism for each doorphone. The doorphone / opener can becontrolled by any extension.BenefitsProvides security for entrances unattended.