Manual Data Switch Box DB25 Female 2-port usually works for Parallel Printers or Serial RS232 Devices

Manual Switch Box
2-Way DB25 A/B Switch
DS-25DBF-M02

DB25 A/B 2-way Manual Switch Box, 2 to 1 Input/Output. Three DB25 Female connectors. Application: Used for sharing parallel or serial peripherals. Each connector is wired straight-through pin-to-pin configuration. Metal case helps prevent unwanted EMI/RFI interference.