Advanced Tubular Loopback Tester Software

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The Loopback Tester software is designed to allow you to test an RS-232 connection using a loopback connector. The software works witha physical connector called a "loopback connector." This is a serial connector usually in DB9 form that loops the RECEIVE (also referred to as "RX") pin back to the TRANSMIT (also referred to as "RX") pin. A loopback connector also often loops the CLEAR TO SEND (CTS) pin back to the REQUEST TO SEND (RTS) pin. It is also possible to loopback DCE Ready (DSR) to DTE Ready (DTR) pins.

This forms a complete circuit for testing the original COM port, and all the connectors and cable in between.

So a loopback tester is used to test an COM port cable and connectors with a single computer. The loopback tester is also used to test Benderlink Ethernet Modules. Here are a few images showing various states of the Loopback Tester software in action.

This screen shows all the controls illuminated at the same time. As the loopback "passes" the test, the Pass bars gets longer and the Failure bars gets shorter. Loopback passfail.jpg
This screen shows both the transmit/receive and Request to Send (RTS) and Clear to Send (CTS)pins passing Loopback passfail.jpg

Loopback passx2.jpg
Loopback failx2.jpg
Loopback passx1.jpg

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