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LINKGAIN Ethernet Extender Industrial Coax

The simple way to send your LAN over coax cable.


11 In Stock
Same Day Shipping (before 5PM ET)
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • Extends 10-/100-Mbps Ethernet over existing coax cabling.
  • Use in pairs to extend point-to-point up to 1.6 miles (2.6 km) at 1 Mbps.
  • Or transmit at 75-Mbps through 85-Mbps speeds up to 656.1 feet (200 m).
  • Take advantage of existing coax to break the 327-foot (100-m) copper Ethernet barrier.


  • Enables you to repurpose RG-6 coax wiring already installed in a building.
  • Extends the life of your installed infrastructure.
  • Transparent to higher-layer protocols.
  • Equipped with Auto MDI/MDI-X port for easy cabling on the RJ-45 side.
  • Autonegotiates for network speed, transmits data in full-duplex mode.
  • Ten symmetrical vDSL speeds.
  • To configure for either local (CO) or remote (CPE) operation, just flip a DIP switch.
  • Can be mounted on a DIN rail or on a wall.
  • Or mount up to 16 extenders in the optional 2U-high, LinkGain Chassis (LB300A-RACK).

  • vDSL Speed/Distance:
    1–5 Mbps: 8530 ft. (2600 m)
    6–10 Mbps: 7874 ft. (2400 m)
    11–16 Mbps: 6561 ft. (2000 m)
    17–20 Mbps: 5905 ft. (1800 m)
    21–29 Mbps: 5249 ft. (1600 m)
    30–43 Mbps: 4593 ft. (1400 m)
    44–54 Mbps: 3937 ft. (1200 m)
    55–63 Mbps: 3280 ft. (1000 m)
    64–74 Mbps: 1968 ft. (600 m)
    75–85 Mbps: 656 ft. (200 m)

    This product works with:
  • LinkGain Chassis, 16-Slot (LB300A-RACK)
    Questions? Contact our FREE Tech Support.

    NOTE: All speed selections are symmetrical on the extender (vDSL) line and full-duplex on the Ethernet side.

    NOTE: Must be used in pairs; this extender is sold individually.

  • Tech Specs

    Approvals CE, RoHS
    Connectors Ethernet port side: (1) RJ-45 (10BASE-T/100BASE-TX); On Ethernet (VDSL) extender port side: (1) BNC coax (RG-6/AU)
    Dimensions 0.9"H x 3.2"W x 4.3"D (2.3 x 8.1 x 10.9 cm)
    Distance On Ethernet port side: 328 ft. (100 m) maximum; On Ethernet (VDSL) extender port side: 1.6 mi. (2.6 km) maximum
    Indicators Unit LED: (1) Power Status (Power); Port LED: (1) Link/Activity, (1) Fax (full-duplex); Line LEDs: (1) Error, (1) Link, (1) Local, (1) Remote
    Power Input: 100-240 VAC, 50-60 Hz, autosensing; Output: 12 VDC; Consumption: 5.76 W maximum, 0.48 A at 12 VDC
    Standards IEEE 802.3 10BASE-T, IEEE 802.3u 100BASE-TX, IEEE 802.3x, Ethernet over vDSL
    Weight 0.3 lb. (0.1 kg)
    This product works with:
    NOTE: All speed selections are symmetrical on the extender line and full-duplex on the Ethernet side. NOTE: Must be used in pairs.

    * 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.



    Double Diamond Warranty

    Extended 1 Year Warranty Available

    Protect your purchase with an additional 1 Year Double Diamond™ warranty!
    Cost: $27.80

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $55.59


    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 Ethernet Extender Industrial Coax comes with a standard 5 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.