943299021 Hirschmann OZDV 2451 G Interface converter electrical/optical for V.24 power supply through data signal; for quartz glass FO for plugging onto the Sub-D socket provided on the terminal or mounting onto a DIN rail (with DIN rail adapter accessories); 1 electrical port: 25-pin Sub-D connector, male; 1 optical port: 2 sockets BFOC 2.5 (STR)