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Switch/Converter Catalog # 303374 - Model 4374 Fiber-to-T1 A/B

    Fiber-to-T1 A/B Switch/ConverterFiber-to-T1 A/B Switch/Converter
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    • Fiber-to-T1 A/B Switch/Converter
    • Fiber-to-T1 A/B Switch/Converter
Base Price:
Catalog No: 303374
Model No: 4374
Product Type:Switches: Copper, Switches: Fiber Optic
Cable Type/Port Connector:RJ45, SC, ST
Channels per Switch Chassis:1
Electronic Switches/Power Required:QuickSwitch® Fiber Optic
Fiber Mode:Multimode
Fiber Size:62.5/125
Fiber Type:Duplex
Local Control:Pushbutton
Mirror Technology:OEO
Wavelength Nano:1300 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.

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
QuickSwitch® Model 4374 SC Duplex Fiber-to-T1 A/B Switch/Converter
with Remote Access

  • High speed Fiber-to-T1 interface conversion

    Model 4374 SC Duplex Fiber-to-T1 A/B Switch/Converter with Remote Access

QuickSwitch® Specifications:
  • PORT CONNECTORS: (2) fiber optic SC duplex female connectors labeled A and B.
    (1) RJ45 female connector labeled COMMON.
  • FRONT PANEL CONTROL:  (1) Manual pushbutton allows local switching.
  • DISPLAY: (2) Front panel LED's display switch position and power status.
  • REMOTE CONTROL:  (1) DB9 female connector on rear panel accepts ASCII RS232 Serial Data for Remote Control operation. 
  • POWER:  UL approved 120VAC, 60 Hz wall mount power module supplies 12 VDC, 500mA to the unit.
  • DIMENSIONS: Desktop 8.0" W x 3.0" H x 8.0" D. (20.3 x 7.6 x 20.3 cm). 
  • WEIGHT: Approximately 2.8 lbs. (1.3 Kg) 


APPLICATION: The drawing illustrates an A/B switch / converter. A T1 port connected to the COMMON port has access to two fiber optic networks connected to the SC Duplex ports A and B.  The DB9 Remote can accept ASCII RS232 Serial Data Commands for Remote Control operation.

4374 SC Duplex Fiber-to-T1 A/B Switch/Converter, Remote Access, Network Diagram

QuickSwitch® 4374 is an SC Duplex Fiber-to-T1 A/B Switch/Converter allows the user the capability of accessing two separate fiber optic SC Duplex ports from a T1 port.  The switch may be controlled manually or remotely.  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 RS232 (DB-9) serial port located on the rear of the unit.

 QuickSwitch® 4374 Fiber Optic Switch Features:

  • Access any one of two separate SC duplex fiber optic networks from one T1 line.
  • High Speed internal data interface conversation circuitry allows
    Fiber Optic-to-Copper network interconnection.
  • Service protocol transparent.
  • Bit-rate and data transparent.
  • All fiber ports are SC duplex, multimode, 62.5/125 micron
    and support a wavelength of 1300 nm.
  • Local control via front-panel pushbutton.
  • Remote control port allows off-site monitoring and switch management.
  • The remote port accepts RS232 Serial Data commands for switch position
    control and monitoring.
  • Front-panel LED's display switch position and power status.
  • Data will not pass through the unit during power loss.
  • When power is restored, the unit will return to last ordered position.
  • Custom length rigorously tested and certified, SC duplex fiber optic cables available for your switch installation.
  • Municipalities, schools, government:  This product is on GSA Schedule!
T1 Network
A digital transmission link with a capacity of 1.544 Mbps.  T1 uses two pairs of normal twisted wires.  T1 normally handles 24 voice conversations, each one digitized at 64 Kbps.  T1 is a standard digital transmission in the United States.  T1 lines are used to connect networks across remote distances.  Bridges and routers are used to connect LANs over T1 networks.  T1 links can often be connected directly to new PBXs and many new forms of short haul transmission.


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.

Electro Standards can supply all of your Fiber Optic Cable requirements. Please click here to reach our Fiber Optic Cable Categories Webpage.

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 On-Line Custom Product Form.

All data switch boxes, 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.

 *Prices online are subject to change and verification.
All ESL products are available for export.




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