Further information for Telecom Behnke BT 25-855 - Door Phone Series 20 "industry standard" (4x horizontally)
Door Phone Series 20 - industry standard (4x horizontal) BT 25-855 consisting of: - Basic Electronics (for phones with integrated electronics and lighting) - lit Tastwahlblockmodul - - speaker to door phone module function module series 20
Construction: aluminum illuminated