Skip to content
Euro Tech Talk

Euro Tech Talk

Technically conversational

  • Home
  • Gadgets
  • Techs
  • Games
  • Socials
  • Businesses
  • Arts
  • Gifts
  • Travels
  • Contacts
  • Home
  • Latest
  • DB 9 Loopback

DB 9 Loopback

Madison Genthry September 30, 2021 2 min read
245

A DB 9 Loopback is a type of telephone switch used to provide connectivity between two telephones. It is also known as a “loop-around” or “circuit breaker”.

The rs232 loopback plug is a device that allows you to connect two devices together. If one of the devices has an RS-232 port, the other can be plugged into it and then both devices will communicate with each other.

The RS232 connection was designed with 25 pins in mind. A supplementary serial RS232 communication channel was provided in this DB25 connection pin arrangement. There is, however, just one serial communication channel with handshaking. There were just a few computers made that had both RS232 channels accessible. Sun SparcStation 10/20 model and Dec Alpha Multia, for example. When we speak about a loop back connection, we can state that it usually simply consists of a connector. It does not need the use of an external cable. It simply consists of an internal wiring arrangement that allows the same signal to be retransmitted to the sender.

A DTE system may simply connect to this DB9 female connection. When the loop back connection is utilized, the signal is received back by the DTE that sent it out, and it will not be able to tell which source sent it out. It implies that the DTE will be unable to distinguish whether the signal it has received is his own or from another source (DCE).

Now the issue arises: what good is it if it resends the signal back to the sender? The solution is buried in its most basic feature: a Loop back connection is utilized to determine if the system’s serial port is operational or not. After ensuring that the functionalities of your system’s serial port are working properly, you may connect your serial cable. If you wish to double-check your serial cable, just connect the loop back connection at the other end of the cable and repeat the signal verification.

DB-9-Loopback

To create a loop back connection, the following pins must be linked, as indicated in the diagram above.

  • Pins 2 (Receive) and 3 (Send) (transmit)
  • Pins 7 (Request to transmit) and 8 (Request to receive) (Clear to send)
  • Pin 1 (Data carrier detect), Pin 6 (Data set ready), and Pin 4 (Data set ready) (Data terminal ready)

The aft view of the female DB-9 connector is shown in the figure below, with red lines and gray dots indicating the linkages to be supplied.

DB-9-Loopback

The DB-9 loopback was created specifically for RS 232 data signal testing.

Visit https://electricalfundablog.com/blog/rs-232/618/ to learn more about RS 232.

The DB 9 Loopback is a serial cable that can be used on DB-9 Serial ports. It allows the user to connect two devices together and monitor what one device is sending to the other.

Related Tags

  • rs232 loopback test
  • serial loopback pinout
  • rs232 cable
  • serial port
Total
0
Shares
Share 0
Tweet 0
Pin it 0
Share 0

Continue Reading

Previous: Alienware Monitor Drivers Download and Install. Quickly & Easily!
Next: Download Voxdox for PC Windows 10,8,7

Trending

What is Genshin Impact and how to run it on Mac 1

What is Genshin Impact and how to run it on Mac

April 29, 2022
17 Best Laptops for Insurance Adjusters in 2022 2

17 Best Laptops for Insurance Adjusters in 2022

December 18, 2021
$700 Gaming PC Build 3

$700 Gaming PC Build

November 23, 2021
Battlefield 1 guide 4

Battlefield 1 guide

November 14, 2021
5 Best RGB Fans (2020) 5

5 Best RGB Fans (2020)

November 9, 2021

Related Stories

The Benefits of Using Box Sign box sign 55m signrequestwheatleysiliconangle
9 min read

The Benefits of Using Box Sign

December 17, 2022 121
What is Internet 3.0? big tech capitol internetthompsonstratechery
13 min read

What is Internet 3.0?

December 17, 2022 97
10 Ways to Relieve Arm Pain Fast
3 min read

10 Ways to Relieve Arm Pain Fast

October 28, 2022 148
How to Start a Trucking Company: 5 Actionable Steps
4 min read

How to Start a Trucking Company: 5 Actionable Steps

October 27, 2022 147
Nurse Staffing: A Reason to Leave and a Reason to Stay
3 min read

Nurse Staffing: A Reason to Leave and a Reason to Stay

October 10, 2022 150
iPhone camera vs Android camera
3 min read

iPhone camera vs Android camera

September 27, 2022 277

recent

Everything you need to know: Airpods 1

Everything you need to know: Airpods

August 10, 2022
Charge iPhone Faster 2

Charge iPhone Faster

August 10, 2022
  • Privacy Policy
  • T/C
  • Contact Us
  • About The Crew
© 2022 Eurotechtalk.com
We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
Cookie SettingsAccept
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT