The 4+n system allows the installation of an intercom with 4 common wires in the riser, where n is the number of wires necessary to control the incoming door calls. In addition, the 4+n system enables the use of intercoms with traditional door calls (using a 12 V AC buzzer) or with electronic door calls (in this case the call tone is emitted directly via the intercom loudspeaker).Product features:Built-in door loudspeaker Replacement device for 4+n standard intercoms (e.g. TL 290, TL 290-12, TL 2690) for installation in standard door stations Volume adjustableTechnical specifications:Compatible with system 4+nOperation on intercoms with +8V= Use mounting adapter 98066 or 98067 Dimensions: 111 x 75 x 30 mmInstallation instructions:Note:
