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

Catalog # 309503 - Model 9503 3-Channel DB25 / DB25 / BNC Switch

    3-Channel DB25 / DB25 / BNC Switch3-Channel DB25 / DB25 / BNC Switch
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    • 3-Channel DB25 / DB25 / BNC Switch
    • 3-Channel DB25 / DB25 / BNC Switch
Base Price:
Catalog No: 309503
Model No: 9503
Product Type:Switches: Copper
Positions:2, 6
Cable Type/Port Connector:Coax Switch Ports, DB25 Switch Ports
Channels per Switch Chassis:3
Manual Control/No Power Required:LineSelect® Manual Operation
Channel Control:Independent Channel Control
Pins Switched:All 25 pins of DB25, center conductor and shield of BNC
Local Control:Rotary Knob


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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Multi Interface Copper Network Switches
Model 9503 Tri-Channel Switch, DB25 A/B/C/D/E/F,
DB25 A/B Switch and BNC A/B, Manual, Rackmount
The Model 9503 Switch system is comprised of three independent sharing switches efficiently packaged in a 19-inch wide 2U high (3.5") rackmount unit.  The network switch functions are described and illustrated below.


  • Independently switch each of the three channels manually via
    three knobs located on the front panel, one knob per channel.
    • Channel 1: DB25 6-Position Switch with (7) DB25 female
      connectors for ports A, B, C, D, E, F and Common, all 25
      leads switched.
    • Channel 2:  A/B DB25 Switch with (3) DB25 female connectors
      for ports A, B, and Common, all 25 leads switched.
    • Channel 3: A/B BNC Switch with (3) BNC female connectors for
      ports A, B, and Common, center conductor and shield switched.
  • All ports located on rear panel.
  • Rackmount style chassis, 19" Wide x 3.5" High x 8" Deep.
  • Manual operation.  No power required.
  • High reliability, precious metal, sealed switches.
  • Custom length DB25 cables and BNC cables are available
    for your switch installation.
  • CHANNEL-1 PORT CONNECTORS: (7) DB25 female connectors
    labeled A, B, C, D, E, F, and Common.
  • CHANNEL-2 PORT CONNECTORS:  (3) DB25 female connectors
    labeled A, B, and Common.
  • CHANNEL-3 PORT CONNECTORS:  (3) BNC female connectors
    labeled A, B, and Common.
  • FRONT PANEL CONTROLS: (3) Manual rotary switches allow
    local switching.
  • DIMENSIONS: Rackmount 19.0" W x 3.5" H x 8.0" D.
  • WEIGHT:  Approximately 5.0 lbs.

FUNCTION DIAGRAM: The function diagram illustrates 3 independent switches. One DB25 6 position switch; one DB25 A/B switch, and one BNC A/B Switch.  Each channel is controlled manually by a rotary switch (knob) on the front panel.

Custom Network Switches are available. Contact us by phone, email, or complete the Online Custom Products Form. /Products-Custom/Copper-Switch/


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

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 Manual Data Network switches are available for export.

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