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The Model 7391 DB25 A/B Fallback Switch Provides a Solution for Network Redundancy

06-11-2019 10:06 AM CET | Media & Telecommunications

Press release from: Electro Standards Laboratories

The Model 7391 DB25 A/B Switch with Automatic Fallback and RS232 Remote

The Model 7391 DB25 A/B Switch with Automatic Fallback and RS232 Remote

Electro Standards has designed a solution to assist in eliminating network downtime with the Model 7391 DB25 AB Fallback Switch. When it’s mission critical to keep your data flowing, you have a secondary network or device to switch over to. When there is a problem with the primary network or device, if it involves plugging and unplugging cables to bring everything back online, this can be very time consuming and every second is critical when your network is down.

Restoring your network data pathway may also involve a location where the network/device is located, that is not always accessible such as during off-hours, inclement weather, etc. This is when the Model 7391 DB25 AB Fallback Switch comes in. The Model 7391 allows your DB25 Interface Devices or Networks to be connected on ports A and B, for easy switching to either port. The unit can be switched manually via front panel pushbutton or from a remote location using RS232 data ASCII commands. The Model 7391 can also be switched automatically.

When in Automatic Fallback Mode, the unit monitors either RD activity or DCD presence on ports A and B. If activity or presence is lost the unit switches to the other port. If there is no activity or presence on either port, the unit will maintain its connection to its present port and continue to monitor both ports. The user can override Automatic Fallback operation from the front panel or Remote port and force the unit to operate as an A/B switch (Manual Mode).

To view more about the Model 7391, visit the product webpage at

To find out more about ESL’s entire line of PathWay® or for a quotation, visit or contact or at 401-943-1164.

Tina Corticelli/Media Manager
Electro Standards Laboratories
36 Western Industrial Drive
Cranston, RI 02921

Electro Standards Laboratories has been manufacturing Data Communication Products for over 40 years. Supporting a variety of applications from Casino IT Networks to Government Secure Mission Critical Data Transmissions.

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