Data Transfer Switch (DTS)

A Data Transfer Switch (DTS) is a mechanical or electronic switching device that allows manual or automatic switching between multiple input and output data signals. It is used to control data transfer between devices such as computers, printers, or network equipment.

Main Functions of a Data Transfer Switch:

• Switching between devices: Allows one device to access multiple peripherals or multiple devices to share a single peripheral (e.g., a printer, modem, or monitor).
• Supports multiple ports: Typically features multiple input and output ports, such as DB25 (parallel), DB9 (serial), USB, or RJ45 (network).
• Mechanical or electronic switching:
  • Mechanical DTS – Operated manually via a rotary or push-button switch.
  • Electronic DTS – Switching occurs automatically based on software or network signals.
• Signal protection: Some models isolate signals to prevent interference and ensure stable data transmission.

Common Uses of a Data Transfer Switch:

• Printer sharing: Connecting a single printer to multiple computers without physically reconnecting cables.
• Switching between serial devices: RS-232 switches allow multiple serial devices to connect to a single computer.
• Switching between two networks: In industrial applications, a DTS can switch between different network environments.
• Retro computing usage: DTS is commonly used in older computer systems to switch serial (RS-232) or parallel ports.

Types of Data Transfer Switches by Interface:

• Parallel (DB25, Centronics) – Used mainly for older printers and computers.
• Serial (DB9, DB25, RS-232) – Suitable for modems, terminals, and older industrial devices.
• USB switches – For modern computers and printers.
• RJ45 (network DTS) – Used to manually switch between two network cables without reconfiguring the setup.

Availability and Pricing Today

Data Transfer Switches are still available from specialized retailers and online marketplaces.

• Mechanical models are more affordable, typically costing $10 to $50, depending on the number of ports.
• Electronic models with automatic switching can cost $60 or more.