This video provides a comprehensive review and demonstration of the Top Tool ET 623, a multi-function device that combines a network cable tester with a digital multimeter (DMM). The reviewer walks through its various capabilities, showcasing how it measures Ethernet cable length per twisted pair, traces cables using a remote probe (scan mode), verifies connector crimps (QC mode), and identifies ports on a network hub (flash mode). The integrated DMM features are also tested, including voltage and resistance, which prove to be accurate but slow to respond and autorange. The device is presented as a useful, specialized tool for technicians working with wired Ethernet infrastructure. A brief teardown at the end reveals a complex internal circuit board with some components having their markings ground off.
Review of the Top Tool ET 623 Network Cable Tester
0:00:07 Multi-Function Tool: The video introduces the Top Tool ET 623, a device that integrates a network cable tester with the functions of a digital multimeter (DMM).
0:02:06 Cable Length Measurement: The device can accurately measure the length of an Ethernet cable. It can also measure each twisted pair individually, which helps identify poorly constructed or faulty cables that give inconsistent readings.
0:04:50 Cable Tracing with Scan Mode: Using a separate handheld probe, the "scan" function sends a signal through a connected cable. The probe beeps when it is brought near the correct wire, allowing for easy cable tracing and identification within a bundle.
0:05:02 Connection & Crimp Verification: The "QC" (Quality Control) mode checks that all pins on an RJ connector are crimped correctly. A separate "Test" mode uses a remote terminator to confirm end-to-end continuity for a cable run.
0:06:42 Hub Port Identification: A "Flash" mode sends a signal to a connected network hub or switch, causing the corresponding port's LED to blink, which helps technicians quickly identify which port the cable is plugged into.
0:09:37 Integrated Digital Multimeter (DMM): The tool includes a full DMM with modes for AC/DC voltage, resistance, continuity, diode check, capacitance, current (milliamps), and a non-contact voltage sensor.
0:10:10 DMM Performance: When tested, the DMM functions were found to be accurate but slow. The device takes a noticeable amount of time to autorange for voltage and resistance, and the continuity checker has a significant delay.
0:11:31 Internal Teardown: A brief look inside the device reveals a surprisingly complex circuit board, with some integrated circuits having their identifying markings intentionally removed.