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303187 - Model 4187 ST Duplex A/B Fiber Switch RS232 Remote & Password Protection

    ST Duplex A/B Fiber SwitchST Duplex A/B Fiber SwitchST Duplex A/B Fiber SwitchST Duplex A/B Fiber Switch
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    • ST Duplex A/B Fiber Switch
    • ST Duplex A/B Fiber Switch
    • ST Duplex A/B Fiber Switch
    • ST Duplex A/B Fiber Switch
Base Price:
Catalog No: 303187
Model No: 4187
Product Type:Switches: Fiber Optic
Cable Type/Port Connector:ST
Channels per Switch Chassis:1
Electronic Switches/Power Required:QuickSwitch® Fiber Optic
Remote Control:RS232 Serial
Security:Password Protection
Fiber Mode:Multimode
Fiber Size:62.5/125
Fiber Type:Duplex
Remote Port:DB9
Local Control:Pushbutton
Mirror Technology:OEO
Speed:100 Mbps
Wavelength Nano:1300


Shipping Terms

Shipments are made via UPS Ground, unless otherwise specified. Freight charges are prepaid and added to your invoice. We can estimate the freight costs for you.

We can ship freight collect on your account, just provide your UPS Account Number.

We can also ship via the carrier of your choice. Provide the details and your account number.

Products shall be shipped F.O.B. Electro Standards' facility. Title to and risk of loss or damage to the products shall pass to you upon Electro Standards delivery of the products to a carrier for shipment. Title to software will remain with the applicable licensor. Electro Standards' prices do not include shipping and handling charges. Electro Standards reserves the right to use its own discretion in the manner and routing of shipments. Electro Standards shall be permitted to deliver products in separate lots.

Shipping Return Policy

  • To return an item, contact Electro Standards at 401-943-1164 to obtain a Return Material Authorization (RMA) number. RMA numbers are valid for 30 days after the date of the shipment and cannot be extended or re-issued. We are unable to accept returns without an RMA number.
  • All returns except those of defective product are subject to a 15% restocking fee, and additional charges for handling or freight are refunded only in cases of defective products.
  • Return freight must be shipped prepaid. We recommend that you insure the package as you are responsible for risk of loss on all returned packages. We recommend that all cartons are properly packed as Electro Standards is not responsible for product damaged en route. We do not issue call tags for product returns.
  • Returned product must be clean, undamaged, and complete with all manuals, accessories, documents and packaging. The items must be in a resalable condition.
  • The product must have with it a copy of the original invoice or packing slip and the appropriate RMA paperwork.
  • If your item is not working properly, please contact Electro Standards at 401-943-1164 for help in trouble-shooting your application.
  • If the product is defective, Electro Standards will repair or replace that item (at our discretion) upon receipt and evaluation of the original product.
  • Electro Standards reserves the right to authorize product returns after 30 days from the invoice date in some cases. If the product is accepted after 30 days, credit will be issued toward future pruchases only and some additional restocking charges may be applied.
  • All credits from RMAs must be used within one calendar year of issue.

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QuickSwitch® Fiber Optic Network Switch, ST Duplex
QuickSwitch® Model 4187 ST Duplex, 100BaseFX A/B Switch with Remote Access

QuickSwitch® Specifications:
  • 100BaseFX A/B PORTS: Ports "A" and "B" are 1300nm,
    ST Duplex, Multimode, 100 BaseFX fiber optic ports. The
    selected port will pass data to and from the Common port.
  • 100BaseFX COMMON PORT: The Common Port is a 1300nm,
    ST Duplex, Multimode, 100BaseFX fiber optic port. The Common
    will pass data to and from the selected port "A" or "B".
  • CONTROLS: Manual pushbutton or via remote DB9 RS-232 serial port.
  • DISPLAY: Front panel LED or computer terminal via remote port.
  • POWER: 115 VAC / 60 Hz, wall mount supply
  • DIMENSIONS: 3" H x 8" D x 8" W
  • WEIGHT: 2.8 lbs.

Model 4187, ST Duplex 100 BaseFX A/B Switch with Remote Access App Note


QuickSwitch® 4187 ST Duplex A/B 100BaseFX AB Switch with Remote Access can access either of two Fiber Optic 100BaseFX ports from a 100BaseFX "COMMON" port. The switch is fully compliant with the 802.3u 100BaseFX standard.

Model 4187 QuickSwitch® Fiber Optic Switch Features:

  • Access either of two separate fiber optic 100BaseFX ports
    from a 100BaseFX COMMON port. The switch is fully
    compliant with the 802.3u 100BaseFX standard.
  • Manual control by the front panel pushbutton.
  • Remote control via RS232 (DB9) serial port.
  • Switch position displayed on front panel LED or on
    computer terminal via remote port.
  • Switch Position Memory: In the event of a temporary power
    failure, the switch will return to the last ordered position
    when power is restored.  Data will not pass through the
    unit during power loss.

Switch Control:  The switch position may be controlled manually via a front panel pushbutton, or remotely from an RS-232 serial port located on the rear of the unit.  To switch manually, simply depress the front panel pushbutton and the switch will change to the new selected position as indicated by the front panel LED's.  Remote switching of the unit is done through an RS-232 (DB-9) serial port located on the rear of the QuickSwitch®  4187, which may be connected to any standard RS-232 port on  a computer.  The computer, once connected to the remote port, may use any common terminal emulation software.

Also called "Fast Ethernet", is a 100 Mbps version of Ethernet (IEEE 802.3u standard).  100BaseFX transmits at 100 Mbps rather than 10 Mbps.  Like regular Ethernet, Fast Ethernet is a shared media LAN.  All modes share the 100 Mbps bandwidth.  To guarantee proper signal timing, a 100BaseFX link cannot exceed 1312 feet (400 meters) in length.


 ST/ST Fiber Optic Cables:
ST/ST, 62.5/125, PVC Multimode Fiber Optic Cables are ESL 981815.
(Note: Custom length.  State whether length is in feet or meters.)


Graphical User Interface (GUI) Option, Catalog No. 519465 For Model 4187

QuickSwitch® 4187 Software Features:

  • Access User Interface via included software.
  • Login password authentication required.
  • Easy to use, simple point and click operation.
  • Remotely access to control or monitor the QuickSwitch® 4187
    ST Duplex A/B Switch System.
  • User's can change the login password
  • Lockout front panel manual access.

This high-quality network switch is available to city, state, and federal government purchasers at a discounted price and favorable payment and shipping terms via GSA Schedule GS-35F-0286V. Click here for GSA details.

Model 4187 is available to government purchasers on our GSA Schedule GS-35F-0286V. Call for discounted price and terms.


QuickSwitch® is a registered trademark of Electro Standards Laboratories.

QuickSwitch® Fiber Optic Switches are available in many configurations: auto fallback, switch/converters, multimode & single mode, and secure off-line positions. Check out our complete line of QuickSwitch® fiber optic switches.

For custom fiber optic network switches contact our friendly sales support staff at 401-943-1164; or email: eslab@electrostandards.com, or complete our online Custom Product Request form.

Electro Standards can supply all your Fiber Optic Cable requirements.

All data switches, data communication products, and data acquisition products are subject to a one year warranty against manufacturing defects.  The limit of ESL liability is limited to the cost of the ESL product provided.

All ESL products are available for export.

Electro Standards welcomes International inquiries: commutateurs à fibres optiques, interruptores de fibra óptica, switch in fibra ottica, switches de fibra óptica, fiberoptiska switcher.

*Prices online are subject to change and verification.

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