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Network Backup Switch Gang Switch 1U 4 Duplex Multimode SC 19 inch Rackmount

Prevent costly network downtime with this reliable A/B gang switching system.


Limited Quantity In Stock
Typically Ships within One Week
Extended Double Diamond™ Warranty Available (3 Additional Year)

*Required field

Product Features

  • Multiport switching to prevent lost productivity and business downtime.
  • Provides A/B switching between fiber SC multimode terminated circuits.
  • Latches the A/B position to keep signals moving even if power is lost.


  • Enables individual or simultaneous (ganged) control of circuits.
  • Switch manually or electronically using a local RS-232 serial console.
  • Lockable switch with removable key for securing gang switching control.
  • Features highly reliable micro-mirror optical switching mechanisms.
  • Transparent to data rates, protocols, formats, and signal levels.
  • Supports connections to Gigabit-speed fiber networks.
  • Compact, 1U-high rackmountable chassis.
  • Includes dual power inputs for redundancy.
  • Daisychain multiple units for up to 255 chassis.

  • Use this optical Layer 1 switching system to add network backup and failover switching to fiber connections on your data networks. It's ideal for mission-critical classified government and military networks, broadcast networks, private medical/healthcare systems, and factory/industrial applications.

    With the Pro Switching System 1U NBS, it's very simple to switch all users from a main network to a backup network at the chassis itself using a momentary toggle switch on the front or via a serial RS-232 workstation.

    Unique latching optical switch mechanisms and micro-mirrors optically route signals between ports. And because the system is fiber based, there's no need to worry about EMI/RFI interfering with signaling in electronically noisy applications.

    The system uses duplex SC connections for each channel (port) to form bidirectional data paths to your 62.5/125-m multimode network segments. Simply connect fiber cables between the system's circuits and the network connections you want to control. As soon as the fiber cables are plugged into the chassis, the selected data paths become active.

    Each switching circuit has a common (C) port that's latched to its associated A or B port, which means it transmits signals even if the chassis is without AC power. Because its relays are physically latched into position, once a position is set, it stays set.

    A key-lockable switch secures the gang switching function. With the key-lock switch in the enabled position, all ports in the Pro Switching System 1U NBS can be simultaneously switched by pressing the momentary toggle switch on the chassis' front.

    Port settings are also software controllable, so you can toggle a connected device from the A to the B position from a workstation. You not only have reliable network paths, but you can automate switching to control individual settings.

    Need to add ports later? Simply daisychain multiple Pro Switching System 1U NBS chassis together—up to 255 in all—and control them as a single system.

    Tech Specs

    Approvals CE, RoHS
    Connectors Switch circuits: (4) containing (3) SC duplex (A/B/C) for a total of (12) SC duplex; Serial control port: (1) DB9 F (RS-232); Daisychain port: (2) RJ-11 (gang in/gang out)
    Dimensions 1.75"H (1U) x 17.25"W x 10.5"D (4.4 x 43.8 x 26.7 cm)
    Indicators Power supply LEDs: (1) status 1, (1) status 2; Switch position LEDs: (1) all ports position A, (2) all ports position B
    MTBF >1.3 million hours (based on field failure rate data for redundant supply configurations in a ground benign environment)
    Operating Environment Temperature: 32 to 104° F (0 to 40° C); Humidity: Up to 95%, non-condensing
    Power Input: (2) 110-230 VAC, 60-Hz adapters for redundancy; Output: 12 VDC, 100 mA nominal, additional 320 mA while switching
    Switches A/B gang switch: (1) momentary toggle switch; Gang switch enable: (1) key-lock switch; System select switch: (1) momentary push-button switch; Rack address switch: (1) 8-position DIP switch; Configuration switch: (1) 8-position DIP switch
    Weight 5 lb. (2.3 kg) excluding external power supplies

    * 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: $329.25

    Extended 3 Year Warranty Available

    Protect your purchase with an additional 3 Year Double Diamond™ warranty!
    Cost: $658.50


    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 Gang Switch 1U 4 Duplex Multimode SC 19 inch Rackmount 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.