Front panel Switch series for 4-row front panels IX04xx as an accessory that can be adapted above, including an induction loop/ring line for hearing aid wearers, which transmits the audio directly to a suitable hearing aid and makes it easier for visitors to communicate with the resident. When in use, this ring line emits an alternating magnetic field that generates an electrical voltage in the receiving coil of the hearing aid through electromagnetic induction, the course of which is the same as that of the audio signal. In the hearing aid, this is amplified by the audio amplifier and passed to the wearer's ear via the earpiece. In order to be able to use such induction loop systems, the hearing aid must have a so-called telephone coil (short: ""T-coil""), which absorbs the alternating magnetic field of the induction loop. The hearing aid microphone is usually deactivated when the telephone coil is used. To be completed with the flush-mounted housing IX9184. Dimensions: 409x127.5x2.5mm.