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MicroRACK Micro NTU G.703 Card, 75-Ohm

A compact NTU for linking G.703 networks to RS-530 or X.21 lines.


Please call 877-877-2269 for a replacement product or part.
Extended Double Diamond™ Warranty Available (3 Additional Year)

Product Features

  • This MicroRACK card offers an ideal way to connect equipment with RS-530 or X.21 interfaces to G.703 networks.
  • Used as a modem for equipment links to a G.703 network, it sends unstructured, sync 2.048-Mbps data from a G.703/E1 network to a router, bridge, or mux.
  • Used as an interface converter, it accepts 75-ohm (dual-coax) G.703/E1 signals and converts them so RS-530 or X.21 equipment can read them.
  • Tech Specs

    Clocking G.703: Internal, external, network (receive loop)
    Diagnostics Loopback
    Speed Network: 2.048 Mbps;
    Terminal: 256 kbps, 512 kbps, 1.024 Mbps, 2.048 Mbps
    CE Approval Yes
    Interface Network: G.703;
    Terminal: RS-530 (V.36/RS-422), X.21 on HD26
    Indicators (5) LEDs: Power, Network, Master Clock, Loop, Loopback
    Power From the rack
    Size 3.1"H x 5.4"W x 1"D (7.9 x 13.7 x 2.5 cm)
    Weight 1 lb. (0.5 kg)

    This product works with:
  • MicroRACK (RM202, RM204, RM208, RM216)
    Questions? Contact our FREE Tech Support.

    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 877-877-2269.

  • Warranty

    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $37.49

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $74.97


    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.

    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.