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Reversible Compact Bidirectional AutoSwitch, 1-to-2, 2-to-1

Go forward or backward: two to one or one to two.


Please call 877-877-2269 for a replacement product or part.
1 YEAR Doublediamond™ Warranty (Standard) DoubleDiamond™ Warranty (Standard)

Product Features

  • Link one or two users to one or two peripherals.
  • Fully compatible with IEEE 1284, ECP/EPP, Centronics®, Byte, and Nibble modes.
  • Supports printers; scanners; Zip™, tape, and CD-ROM drives; digital cameras; and more.


  • Automatically senses Bi-Tronics or Centronics printers.
  • Plug-and-play! Software included.
  • Operates in autolink or manual mode.
  • Built-in microprocessor provides real-time communication.
  • Data transfer rate up to 2 MBps.

  • With the Reversible Compact Bidirectional AutoSwitch from Black Box, connect two computers to one IEEE 1284 Bi-Tronics printer or other parallel device. Or use two parallel devices with one computer. This switch works with HP® DeskJet® printers without disabling the bidirectional communications. It includes a Windows® 95/98/Me direct cable connection.

    This product works with:
  • Optional Power Supply (PS121-R2)
  • Enhanced Parallel Port Cables (EQN200–EQN202)
    Questions? Contact our FREE Tech Support.

  • Tech Specs

    CE Approval Yes
    Connectors Bus: (2) DB25 F; Common: (1) DB25 F
    Distance From the interface: Up to 15 ft. (4.6 m); From the optional power supply: 15–50 ft. (4.6–15.2 m)
    Operating Systems Supported DOS, Windows 3.x/95/98/Me
    Power From the interface or the optional power supply
    Size 1"H x 3.2"W x 3.6"D (2.5 x 8.1 x 9.1 cm)
    Transfer Rate (Maximum) 2 MBps
    Weight 0.3 lb. (0.1 kg)
    This product works with:
  • Optional Power Supply (PS121-R2)
  • Enhanced Parallel Port Cables (EQN200–EQN202)
    Questions? Contact our FREE Tech Support.

    * Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 877-877-2269.

  • Warranty

    Double Diamond Warranty Diamond

    Double Diamond™ Warranty (Standard)

    Take the risk out of equipment purchases with the Double Diamond™ Warranty from Black Box Network Services.

    The Double Diamond Warranty is our warranty that protects your Black Box® brand products* from accidental damage, including drops, water, and power surges.

    The Reversible Compact Bidirectional AutoSwitch, 1-to-2, 2-to-1 comes with a standard 1 YEAR Doublediamond™ Warranty (Standard) warranty already included.

    During the warranty period, Black Box Network Services will repair or replace your damaged equipment within one week of receipt at NO CHARGE!*

    Plus, get an Extended Double Diamond Warranty.

    You can also extend your warranty or protect a previously purchased Black Box® brand product** for an additional year—for only 10% of the purchase price! Or, extend your coverage for a full three years for only 20% of the purchase price!

    Ordering an extended warranty is easy: When viewing a product in your shopping cart, just select the one or three years of additional coverage in the dropdown menu under “Warranty Options.” For details, contact Customer Service at 724-746-5500.

    * Warranty subject to certain exclusions and limitations ** Certain products may not be eligible.

    What’s more, we also have a 45-day return policy. Simply call Customer Service for a Return Authorization (RA) number, return your product in new condition and in the original package, and receive a full refund.