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10BASE-T/100BASE-TX Hardened Ethernet Extender over vDSL, 4-Port


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


  • Simple plug-and-play installation.
  • Saves wiring costs by using voice-grade copper wire—even phone wire you already have installed.
  • Uses symmetrical vDSL for speeds of up to 30 Mbps.
  • Transparent to network protocols.
  • Eight speeds with easy-to-read speed indicator LEDs on top of the extender.
  • Auto MDI/MDI-X on the Ethernet ports.
  • Autosensing for Ethernet speed and duplex.
  • Hot swap extender without powering down.
  • A switch configures the extender for local (CO) or remote (CP) use.

    This 10BASE-T/100BASE-TX Hardened Ethernet Extender uses vDSL to provide an easy, inexpensive way to extend the reach of your Ethernet network over ordinary voice-grade copper wire. Use the Hardened Extender for harsh environments and extended temperature ranges. Because you use your existing copper infrastructure, you save on cabling costs. Plus it has an internal switch and four Ethernet ports, so you can use it to easily add remote ports at the edge of your network.

    Easy setup
    Just plug a hardened extender into each end of your copper wire and use simple DIP switches to set one unit as local (CO) and the other as remote (CP).

    The extender is transparent to upper level protocols such as TCP/IP, and there's never any software to install. Plus, the RJ-45 port autosenses speed and duplex, and it features MDI/MDI-X, so your Ethernet is virtually foolproof!

    Desktop or wallmount
    You can use this compact extender as a desktop or a wallmount standalone unit.

    NOTE: Must be used in pairs with another LB304A, with the 1-port version of this extender (LB303A), or with the LinkGain Ethernet Extender over VDSL (LB300A-R3).

  • Tech Specs

    CE Approval Yes
    Connectors (1) RJ-11, (4) RJ-45
    Indicators LEDs: (1) Power; (4) Speed; (1) Ethernet Link/Activity; (1) Ethernet Full Duplex; (1) VDSL Error; (1) VDSL Link; (1) VDSL Local; (1) VDSL Remote
    Power Power supply sold separately: PSD012: 100-240, 50-60 Hz VAC input to 24 VDC output, DIN-rail mount PSD014: 100-240, 50-60 Hz VAC input to 48 VDC output, DIN-rail mount
    Size 2"H x 5.3"W x 4.3"D (5.1 x 13.5 x 10.2 cm)
    Weight 1.8 lb. (0.8 kg)
    This product works with:

    * 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: $77.20

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $154.39


    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 10BASE-T/100BASE-TX Hardened Ethernet Extender over vDSL, 4-Port comes with a standard 5 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.