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Catalog # 309744 - Model 9744 High Density 32-Channel RJ11/12 A/B Switch & Single Channel DB9 A/B Switch

    32-Channel RJ11/12 A/B Switch; DB9A/B Switch32-Channel RJ11/12 A/B Switch; DB9A/B Switch32-Channel RJ11/12 A/B Switch; DB9A/B Switch
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    • 32-Channel RJ11/12 A/B Switch; DB9A/B Switch
    • 32-Channel RJ11/12 A/B Switch; DB9A/B Switch
    • 32-Channel RJ11/12 A/B Switch; DB9A/B Switch
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Catalog No: 309744
Model No: 9744
Product Type:Switches: Copper
Cable Type/Port Connector:RJ11/12, DB9 Switch Ports
Channels per Switch Chassis:33
Manual Control/No Power Required:LineSelect® Manual Operation
Channel Control:Simultaneous Channel Control, Independent Channel Control
Pins Switched:(2) center pins RJ11/12 and All 9 pins of DB9
Local Control:Rotary Knob

  • 32 Channels of RJ11/12 Simultaneous Switch from A to B
  • 1 DB9 Single Channel Independently Switches from A to B

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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Model 9744 High Density 32-Channel RJ11/12 A/B Switch and Single Channel DB9 A/B Switch, Manual Rackmount

  • Switch to a backup device, quickly and easily!

  • Robust, High Integrity Switch. No Power Required.


  • PORT CONNECTORS: (96) RJ11/12 female connectors; (32) A, (32) B and (32) COMMON. (3) DB9 female connectors; (1) A, (1) B, and (1) COMMON.
  • FRONT PANEL CONTROL: (2) Front Panel Rotary switches; (1) Rotary switch for the RJ11/12 (32-Channels of A/B Switching) and (1) Rotary switch the single DB9 A/B channel.
  • POWER:  No power required. Manually Operated.
  • DIMENSIONS: Rackmount: 19.0” W x 8.75” H x 13” D. (48.3 x 22.2 x 33.0 cm).
  • WEIGHT: Approximately 16.0 lb. (7.3 kg)

LineSelect® Model 9744 32-Channel RJ11/12 A/B Switch and (1) Single Channel DB9 A/B Switch Application

The Application diagram shows 32 Channels of RJ11/12 A/B Switches and (1) DB9 A/B Switch.
Simultaneously switch all 32 channels of the RJ11/12 ports from Position A to Position B and back from Position B to Position A with one Front Panel Rotary Switch.
There is a second Front panel Rotary Switch that allows independent channel switching for the Single channel DB9 A/B Switch.

LineSelect® Model 9744 High Density 32-Channel RJ11/12 A/B Switch & Single Channel DB9 A/B Switch


  • Model 9744 has two front panel rotary switches:
    • One rotary switch simultaneously switches the 32 High Density RJ11/12 channel group.
    • The other rotary switch switches the DB9 Single Channel independently.
  • Two center pins of the RJ11/12 interface are switched via a break-before-make rotary switch.
  • All 9 pins of the DB9 interface are switched via break-before-make rotary switch.
  • The switch ports are transparent to all data.
  • Manually operated. No power required.
  • Attractive all metal, black box packaging provides EMI/RFI shielding.
  • Eliminates the need to plug and unplug cables.
  • Custom length, high quality RJ11/12 patchcords available for your installation.
  • Lifetime warranty against manufacturing defects.

With each of its 32 RJ11/12 channels, the LineSelect® Model 9744 switch allows the user to access two RJ11/12 interface devices connected to its A and B ports with one RJ11/12 device connected to its COMMON port. Additionally, with its single channel DB9 channel, the unit allows the user to access two DB9 interface devices connected to its A and B ports with one DB9 device connected to its COMMON port. The LineSelect® Model 9744 is enclosed in a 5U, full rack size, all metal, black chassis designed to provide EMI/RFI shielding and fit in a standard 19” rack.

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. 

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