401-943-1164 / US & Canada Toll Free: 877-943-1164

Catalog # 302154 - Model 4875 KVM A/B Switch

    Special Interface KVM A/B Switch
Click image to enlarge
Base Price:
Catalog No: 302154
Model No: 4875
Feature:Custom RS422 Keyboard
Product Type:Switches: Copper
Cable Type/Port Connector:HD15 Switch Ports, DB25 Switch Ports, Mini-DIN
Channels per Switch Chassis:1
Electronic Switches/Power Required:PathWay® Copper
Remote Control:Contact Closure
Remote Port:RJ45
Local Control:Pushbutton


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.

Ask a Question

Protected Document Request


Path Way® Remotely Controllable Network Switch, KVM
Model 4875 Remotely Controllable Special Interface KVM A/B Switch
- Applicable to custom RS422 Keyboard 


    • Keyboard Ports: (3) DB25/F connectors, keyboard ports A/B/COMMON,
      supports pins 2, 3, 4, 5, 6, 7, 8, 20.
    • VGA Monitor: (3) HD15/F connectors, VGA monitor ports, A/B/COMMON,
      full VGA interface supported.
    • PS/2 Mouse Ports: (3) Mini-Din-6/F connectors, PS/2 mouse ports, A/B/COMMON, full PS/2 interface supported.
    • (1) Modular RJ45 connector, Remote port.
    • (1) Power jack.
  • POWER SUPPLY: Auto-ranging external power module, 90 - 265 VAC, 50/60 Hz, 10 Watts.
  • FRONT PANEL CONTROLS: (1) pushbutton.
  • INDICATORS: (2) Red LED status indicators.
  • DIMENSIONS DESKTOP CONFIGURATION: 2.82" H x 7.94" D x 7.25" W (7.2 x 20.2 x 18.4 cm).
  • WEIGHT: 2 lbs (0.9 Kg) 
  • MTBF: 100,000 hours.
  • OPERATING TEMPERATURE: 5 - 45 degrees C.
  • HUMIDITY: 10% - 90%.
  • ALTITUDE: 0 - 7000 ft. above sea level.

KVM SWITCH APPLICATION: The drawing illustrates an RJ45 remote port accepting Contact Closure Signaling using the Model 4856 Single channel remote, or the Model 4855 sixteen channel remote. You can alternatively use your own contact closure device. Access either of two computers or servers from a single KVM device connected to the COMMON port.   

Diagram of Model 4875 Remotely Controllable Special Interface KVM A/B Switch Network Application


  • PS/2 mouse port emulation
  • Video port signals are regenerated
  • Video resolution up to 1920 x 1440
  • Video bandwidth 200 MHz
  • Custom RS422 keyboard port
  • Mouse, Monitor & Keyboard all switched simultaneously
  • Supports hot plugging the mouse port
  • Switch via front panel pushbutton or remotely via contact closure

The PathWay® Model 4875 AB switch allows the user the capability to access either of two computers from a single set of KVM devices.  The keyboard, monitor, and mouse devices are connected to the Common set of ports, and the computers are connected to the A and B set of ports.

The switch position can be controlled manually via front panel pushbutton, or remotely via a simple contact closure connected to the RJ45 Remote port.  Remote switching can be achieved by connecting to either of the optional remote units: Model 4856 Single Channel Console Remote (Cat. #302074), or the Model 4855 16 Channel Area Remote unit (Cat. # 302071).  Remote switching can also be achieved by connecting to your contact closure device.

Remote port connection details: 
If the Model 4875 detects a transition from open to closure and remains closed across pins 2 & 3, the unit will switch to the B position.  If the Model 4875 detects a transition from closed to open and remains open across pins 2 & 3, the unit will swtich to the A position.

To read the article: "ADVANCES IN NETWORK SWITCHES", click link to read as a pdf. You need Acrobat Reader to view this file.

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 terms


Electro Standards can supply all of your Network Cable requirements. Click here to reach our Copper Cable Assemblies 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
*Prices online are subject to change and verification.

All ESL products are available for export.

Electro Standards welcomes International inquiries: commutateur de réseau, conmutador de red, switch di rete, przelacznik sieciowy, switch de rede, nätverksswitch,

Available Combo Deals