---
product_id: 3958225
title: "CABLEMAX RS-232 LED Link Signal Tester - DB-9 Male to DB-9 Female Connections for Serial Communication Monitoring"
brand: "cablemax"
price: "186.80 DT"
currency: TND
in_stock: true
category: "Cablemax"
url: https://www.desertcart.tn/products/3958225-cablemax-rs-232-led-link-signal-tester-db-9-male
store_origin: TN
region: Tunisia
---

# Instant dual-color LED diagnostics No external power needed Universal DB-9 RS-232 compatibility CABLEMAX RS-232 LED Link Signal Tester - DB-9 Male to DB-9 Female Connections for Serial Communication Monitoring

**Brand:** cablemax
**Price:** 186.80 DT
**Availability:** ✅ In Stock

## Summary

> ⚡ Diagnose Like a Pro, Anywhere, Anytime!

## Quick Answers

- **What is this?** CABLEMAX RS-232 LED Link Signal Tester - DB-9 Male to DB-9 Female Connections for Serial Communication Monitoring by cablemax
- **How much does it cost?** 186.80 DT with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/3958225-cablemax-rs-232-led-link-signal-tester-db-9-male)

## Best For

- cablemax enthusiasts

## Why This Product

- Trusted cablemax brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Cross-Platform Support:** Compatible with Windows, Linux, and macOS, ensuring flexible deployment across all your devices.
- • **Plug & Play Simplicity:** No drivers or software required—just connect and start testing immediately, perfect for on-the-go professionals.
- • **Power-Free Portability:** Operates without external power, making it an essential tool for fieldwork and low-resource environments.
- • **Instant Visual Diagnostics:** Dual-color LEDs on each pin provide real-time signal and data flow status for lightning-fast troubleshooting.
- • **Universal RS-232 Compatibility:** Seamlessly works with any male or female DB-9 serial port device—printers, modems, PLCs, and more.

## Overview

The CABLEMAX RS-232 LED Link Signal Tester is a compact, plug-and-play device designed for instant diagnostics of DB-9 serial connections. Featuring dual-color LEDs for each pin, it provides real-time signal and data flow monitoring without requiring external power. Compatible with all RS-232 DB-9 male and female ports and supporting major operating systems, it’s the go-to tool for professionals needing reliable, portable serial communication testing.

## Description

Buy CABLEMAX RS-232 LED Link Signal Tester - DB-9 Male to DB-9 Female Connections for Serial Communication Monitoring: Cables & Interconnects - desertcart.com ✓ FREE DELIVERY possible on eligible purchases

## Features

- [ Instant Diagnostics ] : Quickly test COM port function & verify RS-232 signal activity with dual-color LED indicators on each pin for easy troubleshooting.
- [ Universal Compatibility ] : This serial tester works with any male or female 9-pin RS-232 serial connection, supporting DB-9 configurations.
- [ No External Power Required ] : Operates without external power - ideal for field work, portable kits, or low-resource environments.
- [ Plug & Play Installation ] : No drivers or setup needed - just connect and begin testing immediately.
- [ Quick Status Monitoring ] : LED indicators flash to signal the direction of data flow, allowing easy real-time monitoring.
- [ Broad OS Support ] : Compatible with Windows 11, 10, 8, 7, Linux, and macOS for flexible deployment across platforms.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004OT995U |
| Best Sellers Rank | #81 in Serial Adapters #6,508 in Computer Cables & Interconnects |
| Brand | CABLEMAX |
| Color | Black |
| Compatible Devices | Devices with RS-232 DB9 female serial ports such as printers, modems, CNS machines, PLCs, radios, etc. |
| Connector Type | DB-9 |
| Customer Reviews | 4.6 4.6 out of 5 stars (303) |
| Finish | Plastic |
| Item Dimensions | 1.77 x 1.38 x 0.82 inches |
| Item Weight | 1 Ounces |
| Manufacturer | Cablemax |
| Mfr Part Number | DB9-TERS |
| Model Number | DB9-TERS |
| Number of Items | 1 |
| Number of Ports | 1 |
| Package Quantity | 1 |
| Power Plug Type | No Plug |
| Smart Home Compatibility | Not Smart Home Compatible |
| Specific Uses For Product | Test the connection on male or female 9-Pin serial connections |
| UPC | 729440626303 |
| Unit Count | 1.0 Count |
| Warranty Description | 1 Year |
| Warranty Type | 1 Year |

## Product Details

- **Color:** Black
- **Connector Type:** DB-9
- **Item dimensions L x W x H:** 1.77 x 1.38 x 0.82 inches
- **Specific Uses For Product:** Test the connection on male or female 9-Pin serial connections

## Images

![CABLEMAX RS-232 LED Link Signal Tester - DB-9 Male to DB-9 Female Connections for Serial Communication Monitoring - Image 1](https://m.media-amazon.com/images/I/61FCttfCyxL.jpg)

## Questions & Answers

**Q: How the indicator led tell you is ok or not**
A: Please use the following link, it has all the information on the operation, single page easy reference and description of the lamps and how the display of lit, not lit, and color of the LED is interpreted.http://serialstuff.amazonwebstore.com/CableMax-RS232-LED-link-Tester-DB9/M/B004OT995U.htm

**Q: Are there simply LEDs connected to the lines, or does it have one shot circuitry to make the LEDs stay on for a bit even with a short pulse?**
A: There is no one-shot dwell circuit, but the LEDs are two-color so you can see signal levels even when they're asserted false/space.

**Q: Will this device show if the PC serial port is working properly, or does it have to be plugged in between the pc and a device, such as a printer?**
A: it needs to be plugged in between the pc and a device. it will indicate comunication between the two on each of the pins of the rs-232.

**Q: Is it possible to test db25 connections with this device? Maybe with an adapter,?**
A: Yes, you will need a DB25 Male to DB9 female adapter. If you want to test online then you would also need a DB9 Male to a DB25 female adapter.

## Frequently Bought Together

- CABLEMAX RS-232 LED Link Tester DB-9 Male to DB-9 Female
- RS232 Breakout Tester LED Monitor, DB9 Male to Female Breakout Module
- DB9 null modem male to female slimline data transfer serial port adapter 2 Pack

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*Product available on Desertcart Tunisia*
*Store origin: TN*
*Last updated: 2026-07-12*