Call transmitter for the input of control commands, particularly for an elevator installation

A call transmitter for inputting control commands to an elevator control system comprising:

• an elevator installation face plate having an outer surface and an aperture formed therethrough;
• a generally tubular housing having opposed first and second end faces, said first and second end faces having first and second openings formed therein respectively, said first and second openings being aligned along an actuation axis, and a flange radially extending from said housing at said second end face;
• and
• at least one carrier element selectively receivable in said first and second openings whereby when said housing is mounted in said aperture with said flange abutting said outer surface of the face plate, said at least one carrier element is received in said second opening to project outwardly from said outer surface, and when said housing is mounted in said aperture with said first end substantially flush with said outer surface, said at least one carrier element is received in said first opening substantially flush with said outer surface.