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RS232 Data Broadcast Device - RJ-11, 8-Port

RS232 data received into the Master Port is regenerated and transmitted out eight Distribution Ports.


52 In Stock
1 Year Double Diamond™ Warranty (Standard)

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Product Features

  • Fully regenerate an async host signal and broadcast it out to eight slave ports.
  • Supports TXD, RXD and GND only.
  • Ideal for polling applications or other controlled environments.
  • Viewed from the rear, the left conductor is TXD, the center two conductors are signal grounds, and the right conductor is RXD.


  • All ports are DTE/DCE switch-selectable.
  • Put one between your async CPU and up to eight terminals. Students see everything on your screen.
  • Ideal for polling applications or other controlled environments
  • DB25 model is rackmountable and enables you to connect each port directly and quickly to slave ports.
  • Use RJ-11 version in modular wiring environments. Order an optional RJ Adapter Kit to connect it to premise DTEs equipped with DB25 connectors.

  • Tech Specs

    Connectors TL158A-R4: (9) DB25 F; TL159A: (9) RJ-11
    Flow Control Software only, transparent to speed and data
    Interface RS-232
    Power 115 VAC, 60 Hz
    Protocol Async
    Size TL158A-R4: 2.3"H x 12.2"W x 11.1"D (5.8 x 31 x 28.2 cm); TL159A: 1.5"H x 5.5"W x 8.5"D (3.8 x 14 x 21.6 cm)
    Speed Transparent
    User Channels 8
    Weight TL158A-R4: 8.3 lb. (3.8 kg); TL159A: 2.4 lb. (1.1 kg)
    The TL159A is not rackmountable.

    These products work with:
  • Standard RS-232 Low-Noise Cable, 25-Conductor (ECM25T, ECM25C)
  • RJ-11 (4-Wire) Modular Cable, Straight-Pinned (EL04MS)
    The TL158A-R4 also works with:
  • Rackmount Bracket (TL486)
    The TL159A also works with:
  • RJ-11 Adapters (FA252–FA253)
    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.

  • Support

    Application Diagram


    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 8-Port RS232 RJ11 Data Broadcast Device comes with a standard 1 Year Double Diamond™ Warranty (Standard) 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.