Aiphone GF-1DK Terminals Local Bell CE Local Bell NOTE : GF-1DK replaces GF-1D which is no longer available. IMPORTANT NOTE : 1) Before replacing the handset make note of the wires to each terminal on the existing unit (an easy way is to cut each core off leaving a piece of the insulation in place with colour visible) twist unused cores together (so you know they are not used, do not short them out).