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G.703 75–120 High-Speed Adapter, 8-Mbps, Female  

Use twisted-pair equipment with your G.703 network.


Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Highlights

  • Solve mismatches between coax and twisted-pair equipment.
  • Make 75-ohm (dual-coax) and 120-ohm (twisted-pair) network connections.
  • Convert bidirectionally between G.703 balanced and unbalanced interfaces.

  • Further Details

  • Protect against ground loops.
  • Features transformer isolation for protection against ground loops.
  • Choose from models that support 2.048-Mbps or 8-Mbps speeds.
  • 2.048-Mbps models can be ordered with 1.6/5.6 dual-coax connectors.

    Use G.703 75–120 Adapters to connect your G.703 network to your shielded twisted-pair equipment.

    These adapters address the open network provision (ONP) requirement that European post, telephone, and telegraph (PTT) authorities offer 120-ohm twisted-pair terminations to their customers.

    Use the adapters to convert the balanced G.703 signals from your bridges and routers to unbalanced G.703 signals. So you can use your 75-ohm coax hardware and communicate with 100-ohm or 120-ohm twisted-pair equipment. The adapters convert signals bidirectionally, too.

    Setup is super easy. Just plug in the adapters. If needed, you can configure the shield connection between the 75-ohm and twisted-pair interfaces.

    The G.703 75–120 Adapters support E1 data rates to 2.048 Mbps. For sending TX and RX signals over STP cable, order the MT256A-F, which has 1.6/5.6 dual-coax connectors.

    The G.703 75–120 High-Speed Adapters support data rates to 8 Mbps.

  • Speed (Maximum) — MT1242A-M, MT1242A-F, MT256A-F: 2.048 Mbps;
    MT260A-F, MT260A-M: 8 Mbps
    Transformer Isolation — Up to 500 volts AC/DC
    CE Approval — MT1242A-M, MT1242A-F, MT256A-F
    Interface — A: G.703 unbalanced;
    B: G.703 balanced
    Connectors — Interface A: Dual-coax BNC M or F;
    Interface B: 8-pin shielded RJ-48C
    Size — 0.8"H x 1.7"W x 2.7"D (2 x 4.3 x 6.9 cm)

    NOTE: Technical specification weight is the unit weight. It is not the packaged shipping weight. For shipping weight, please contact Black Box customer service at 1-800-316-7107.

    Product Data Sheets

    Double Diamond Warranty
    Extended Double Diamond™ Warranty Available (3 Additional Year)

    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 G.703 75–120 High-Speed Adapter, 8-Mbps, Female comes with a standard 1 Year 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.

    Product SKU Price Quantity
    G.703 75–120 Adapter, Female with 1.6/5.6 Coax Connectors and Transformer Isolation, 2.048-Mbps MT256A-F $94.90
    G.703 75–120 High-Speed Adapter, 8-Mbps, Male MT260A-M $121.15
    You can find this product in the following subcategory(s)

    Add to Cart

    Price: $121.15

    Quantity Available: 13




    Shipping Info

    In Stock - orders received before 5PM ET ship same day

    Weight: 0.2 lbs.
    HxWxD: 1 x 9 x 5 in.

    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.

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