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Catalog # 305231 - Model 7231 DB25/X.21 BIS Interface A/B Switch, with IEC 60320 C14 inlet for International Applications

    DB25/X.21 BIS Interface A/B Switch, Desktop
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Catalog No: 305231
Model No: 7231
Product Type:Switches: Copper
Cable Type/Port Connector:DB25 Switch Ports
Channels per Switch Chassis:1
Electronic Switches/Power Required:PathWay® Copper
Remote Control:RS232 Serial
Pins Switched:25
Remote Port:DB9
Local Control:Pushbutton


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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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Path Way® Remotely Controllable Network Switch, DB25/X.21
Model 7231 DB25/X.21 BIS Interface A/B Switch with Serial Remote Control

PathWay Model 7231 DB25/X.21 BIS Interface A/B Switch with Serial Remote Control


  • PORT CONNECTORS: (3) DB25 (F) connectors labeled A, B, and COMMON.
  • FRONT PANEL CONTROL: (1) Manual pushbutton allows for local switching.
  • DISPLAY: (2) Front panel LED's display switch position and power status.
  • REMOTE CONTROL: (1) DB9(F) connector on rear panel accepts RS232 Serial Data for remote control operation.
  • POWER: (Cat No 517277) CE, RoHS, and UL listed wall mount power module 100VAC / 240VAC, 50Hz/60Hz power to the unit.  Has IEC 60320 C14 inlet. Ideal for international applications. This is a wide range power module to cover North American and European Applications.
  • DIMENSIONS: Desktop, 7.75" W x 7.25" D x 2.0" H.
  • WEIGHT: Approximately 1.8 lbs. (0.8 kg) 

X.21 BIS INTERFACE DB25 A/B SWITCH APPLICATION : The drawing illustrates a DB25 / X.21 BIS Interface device connected to the DB25 COMMON port sharing between two other DB25 / X.21 BIS interface devices connected to the A and B ports.  Also illustrated are a DB9 Remote port for remote control via ACSII RS232 Serial data commands and a wide range power supply for North American and European applications. 

DB25/X.21 BIS Interface Application with RS232 Remote in an A/B Switch


  • Allows quick connection to any one of two DB25/X.21 BIS Interface devices from one COMMON device.
  • All (25) pins of the DB25 interface are switched.
  • Eliminates the need to plug and unplug cables.
  • Transparent to data speed and format.
  • Front panel pushbutton control.  
  • Remote RS232 ACSII commands that allow the user to control switch position, lockout front panel operations, and obtain switch status.
  • Remote commands to set pushbutton-position change delay value.
  • Front panel LED's display present position and power status.
  • The unit maintains last set position on power loss and continues to pass data.
  • Attractive anodized black box packaging provides EMI/RFI shielding.
  • A wide range UL approved power module is supplied with the unit (100VAC/240VAC, 50Hz/60Hz) to cover North American and European applications.
  • Custom length DB25 cables available for your switch installation. 

The PathWay® Model 7231 Single Channel DB25/X.21BIS Interface A/B switch provides A/B Switching in a low profile, desktop unit. The interface is made up of DB25 female port connectors.  The Model 7231 is packaged in a slim desktop style enclosure.

The Model 7231 Single Channel DB25/X.21BIS Interface A/B switch allows the user the capability of sharing a DB25/X.21 BIS Interface device connected to the Common port connector between two other DB25/ X.21 BIS Interface devices connected to the A and B ports.

The switch may be controlled locally by manually operating the front panel pushbutton or remotely from a DB9 female serial interface Remote port located on the rear of the unit.  The user may set Duration Time which will require the operator to hold down the pushbutton for a period of time in order to change the switch position.  If the pushbutton is released prior to the Duration Time, the unit will not change position.  The front panel LED dispaly indicates the switch position and unit power status.  All connections are switched simultaneously.

Electro Standards can supply all of your Network Cable requirements. Click here to reach our CABLES, COPPER NETWORK Webpage. 

For custom network switches call our friendly customer support staff at 401-943-1164, email eslab@electrostandards.com, or complete our online form: /Products-Custom/Copper-Switch/

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.

Electro Standards welcomes International inquiries: commutateur d'ordinateur,  equipo interruptor, interruttore del calcolatore, interruptor do computador, dator switch.

Electro Standards’ products are integrated into systems worldwide, including but not limited to:

Australia, Canada, Chile, Denmark, France, Germany, Greece, Israel, New Zealand, Philippines, Puerto Rico, Romania, Singapore, South Korea, South Africa, Spain, Switzerland, Thailand, The Netherlands, UAE, UK.


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