LineSelect® Model 9257 Dual Channel RS530 DB25 A/B Switch, Manual, Independent Switching, Rackmount
Overview
The LineSelect® Model 9257 RS530 DB25 A/B Switch allows the user to access two DB25 interface devices connected to its A and B ports with one DB25 interface device connected to its COMMON port, for each channel. Independent switching of each of the two channels is accomplished via the two knobs located on the front panel. The LineSelect® Model 9257 is enclosed in a 1U, full rack size, all metal, black chassis designed to provide EMI/RFI shielding and fit in a standard 19" rack.
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Custom labeled for VSAT-Dish / HF-Radio applications.
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High Quality Manual Data Network Switches Increase the Reliability of Your Network!
FEATURES OF THE MODEL 9257 DUAL CHANNEL A/B MANUAL SWITCH:
- Each of two channels allows quick connection to any one of two devices from one COMMON device.
- Independently switches each of the two channels via two front-panel rotary switches.
- High quality sealed switch with self-wiping low impedance contacts.
- All 25 pins of the DB25 interface are switched via break-before-make rotary switch.
- Supports RS530 or ANY DB25 interface device.
- Transparent to data speed and format.
- Eliminates the need to plug and unplug cables.
- Attractive all metal, black box packaging provides EMI/RFI shielding.
- Rackmount configuration is standard.
- Lifetime warranty against manufacturing defects.
- For a similar switch with generic labeling, see Model 9256, Cat No 309256.
TECHNICAL SPECIFICATIONS:
- PORT CONNECTORS: (3) DB25 female connectors for each of two channels labeled A, B, and COMMON.
- FRONT PANEL CONTROLS: (2) Rotary Switches on front panel select position for each of the 2 channels.
- Custom labeled as listed in Table 1.
- POWER: No power required. Manually operated.
- MTBF: 157, 945 HRS.
- DIMENSIONS: Rackmount 19.0" W x 1.75" H x 8.75" D. (48.3 x 4.4 x 22.3 cm)
- WEIGHT: Approximately 4.3 lbs. (2.0 kg)
LineSelect® Model 9257 Dual Channel RS530 DB25 A/B Switch Application, Independent Manual Control: (Custom labeled for VSAT-Dish / HF-Radio)
The drawing illustrates two channels of independent switching via local controls. A COMMON device is connected to the DB25 COMMON port for each channel of two channels (Channel 1 and Channel 2). Both COMMON Devices, (COMMON Device 1 and COMMON Device 2), each has access to two other devices connected to the DB25 A and B ports of the custom labeled unit.

Table 1 Switch Labels
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CHANNEL
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A-POSITION
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B-POSITION
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1
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HF
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VSAT
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2
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HF
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VSAT
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Ask about our popular Model 900 EIA/TIA RS-530 Interface Analyzer
- Red and Green light emitting diodes indicate status of key signals at the EIA/TIA data interface.
- Easy to use, for fault isolation.
- Electro Standards can supply all your Network Cable requirements.

Ordering Information
- Catalog Number: 309257
- Model Number: 9257
- 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.
Electro Standards can supply all 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 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 d'ordinateur, equipo interruptor, interruttore del calcolatore, interruptor do computador, dator switch.