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Catalog # 304293, Model 4293 LC Duplex A/B/C/D/OFFLINE Fiber Switch with Keylock & Contact Closure Remote

    LC A/B/C/D/OFFLINE Fiber Switch with KeylockLC A/B/C/D/OFFLINE Fiber Switch with KeylockLC A/B/C/D/OFFLINE Fiber Switch with KeylockLC A/B/C/D/OFFLINE Fiber Switch with Keylock
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    • LC A/B/C/D/OFFLINE Fiber Switch with Keylock
    • LC A/B/C/D/OFFLINE Fiber Switch with Keylock
    • LC A/B/C/D/OFFLINE Fiber Switch with Keylock
    • LC A/B/C/D/OFFLINE Fiber Switch with Keylock
Base Price:
Catalog No: 304293
Model No: 4293
Product Type:Switches: Fiber Optic
Positions:5, Offline
Cable Type/Port Connector:LC
Channels per Switch Chassis:1
Electronic Switches/Power Required:QuickSwitch® Fiber Optic
Remote Control:Contact Closure
Security:Keylock, Offline Position
Fiber Mode:Multimode
Fiber Size:50/125
Fiber Type:Duplex
Remote Port:DB15
Local Control:Keylock
Mirror Technology:OO
Wavelength Nano:1310 nm


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.

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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, LC Duplex
QuickSwitch® 4293 Single Channel LC Duplex A/B/C/D/Off-Line Switch, with Contact Closure Remote and Keylock

  • Secure OFFLINE switch position stops any, and all data throughput for the switch.


  • FIBER:  LC multimode, 50/125 micron, wavelength 1310 nm.
  • PORT CONNECTORS: (5) LC duplex female connectors, labeled A, B, C, D and COMMON.
  • FRONT PANEL CONTROLS: (5) Manual pushbuttons allow local switching. (1) Front panel Keylock locks or unlocks the front panel pushbutton control.
  • DISPLAY: (5) Front-panel LED's display switch position, and power status.
  • REMOTE CONTROL: (1) DB15 female connector on rear panel accepts contact closure switch commands for Remote Control operation.
  • POWER: UL Approved 100 VAC/240VAC, 50Hz/60Hz wall mount power module supplies 12 VDC, 500 mA to the unit. Has 2-prong, US, non-polarized plug.
  • DIMENSIONS: 19.0" W x 1.75" H x 10.80" D (48.3 x 4.5 x 27.5 cm)
  • WEIGHT: Approximately 5.3 lbs. (2.5 kg)


The drawing illustrates a COMMON device connected the LC Duplex COMMON port with access to four Devices, Device A, Device B, Device C and Device D connected to the LC Duplex ports labeled A, B, C, and D. An OffLine position can be selected to stop any, and all data throughput. The front-panel Keylock can be in an "Unlocked" or "Locked" position. In the "Locked" position front-panel operations is inhibited.  In the "Unlocked" position, the front-panel can be used to control switch operations. A REMOTE DB15 female connector can be used to remotely control the switch via Contact Closure commands.

QuickSwitch® 4293 LC Duplex A/B/C/D/OFFLINE Switch with Contact Closure Remote application


  • Allows quick connection to any one of four devices from one COMMON device.
  • The switch ports are transparent to all data.
  • All fiber signals are switched via break-before-make MEMS-based mirror/prism switch technology and supports Gigabit data rates.
  • Switch reverts to the offline position on power loss and does not pass data.
  • Upon power up, unit remains in the offline position until commanded otherwise .
  • Front-panel pushbutton control.
  • Remote Contact Closure control and status provides dry contact logic to allow the control of the switch position and lockout state as well as obtain the present position and lockout status.
  • Front panel Keylock inhibits or permits pushbutton control.
  • Front-panel LED's display present position and power status.
  • All fiber ports are LC Multimode, 50/125 micron, and support a wavelength of 1310nm.
  • The fiber ports are configured per TIA/EIA-568-B.3, where the TX of the COM port is routed to the RX of the AB ports and vice versa.
  • Custom length rigorously tested and certified, LC fiber optic cables available for your switch management.
  • One year parts and labor warranty against manufacturing defects.

The QuickSwitch® 4293 Single Channel LC Duplex A/B/C/D/Off-Line Switch with Contact Closure Remote and Keylock allows a device connected to the COM port access to the A, B, C, or D ports.  The QuickSwitch® 4293 is enclosed in a 1U, full rack size, all metal, black chassis designed to fit in a standard 19" rack. Front panel Keylock inhibits or permits pushbutton control.

The switch may be controlled locally by manually operating the front panel pushbutton or remotely from the DB15 REMOTE port located on the rear of the unit.  The DB15 REMOTE port provides control through Contact Closure and allows the user to both control and monitor the switch position remotely.  The DB15 REMOTE port also allows the user the capability of locking out the front panel pushbutton controls.  The front panel LED display indicates the switch position and unit power status.

OPTION: WIDE RANGE POWER MODULE (Cat. No. 517277) CE, RoHS, and UL listed table mount power module, 100VAC-240VAC, 50Hz-60Hz for use in place of the standard power module that is included with the unit.  Has IEC 60320 C14 inlet.  Ideal for international applications.

Electro Standards can supply all your Network Cable requirements. Click here to reach our FIBER OPTIC CABLE Webpage.

For custom network switches call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our online custom product request form.

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.

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

QuickSwitch® is a registered trademark of Electro Standards Laboratories.

*Prices online are subject to change and verification.

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. 

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