TECHNICAL SPECIFICATIONS:
- 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.
DB25/BNC TRI-CHANNEL SWITCH APPLICATION:
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.

Ordering Information
- Catalog Number: 309503
- Model Number: 9503
- Base Price: See website or contact us for current pricing and availability.
Documentation & Support
- Specification Sheet (PDF) Download Available.
- Product Manual available upon request.
- For custom fiber optic network switch requirements contact our sales support team 401-943-1164 or email eslab@electrostandards.com
- We welcome international inquiries and ship worldwide.
Shipping and Returns 
- Shipped via UPS ground (unless otherwise requested).
- Freight Charges prepaid and added to invoice. We can estimate freight charges for you.
- Return policy: contact us within 30 days of shipment for an RMA number. Items returned without RMA not accepted. Please refer to our full return policy in our Terms and Conditions found on our website.
TO READ THE ARTICLE "HOW TO DETERMINE THE RIGHT FIBER OPTIC NETWORK BACKUP SWITCH FOR YOUR APPLICATION" EITHER CLICK THE LINK OR APPLICATION NOTE ICON AT TOP OF PAGE.
LineSelect® is a registered trademark of Electro Standards Laboratories.
For custom fiber optic network switches contact our friendly sales support staff at 401-943-1164; or email: eslab@electrostandards.com, or complete our online Custom Product Request form.
Electro Standards can supply all of your Network Cable requirements. Click here to reach our CABLES, COPPER NETWORK Webpage.
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.
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.
*Prices online are subject to change and verification.
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
*Prices online are subject to change and verification.