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A DB9 null modem cable typically connects two serial devices directly without a modem. The pinout configuration commonly used is: Pin 2 (Transmit Data) connects to Pin 3 (Receive Data), and Pin 3 connects to Pin 2. Additionally, Pin 5 (Ground) is connected to Pin 5. In terms of color code, common wire colors are often black for ground, blue for transmit, and orange for receive, but these can vary by manufacturer, so it's essential to check specific cable documentation.
What else can I help you with?
Is null modem a device or technology?
A device is an example of technology. A null modem cable is a device.
Where do you find a user guide on networking with a null modem?
A user guide on networking with a null modem can be found in various places. One place is to check the information that came with the null modem. If one cannot find the answers they seek there, then another place is to check with a networking expert.
What is a null modem cable?
A null modem cable is a cable which connects two computers directly. The connection is made using serial interface and actually requires no modem or phone line. These connections can be useful for some legacy applications, however due to the availability of low cost networking equipment null modem connections are now rarely used.
Where could one find a null modem serial cable for purchase?
You can find a Null Modem Serial Cable for sale from stores such as Walmart, Tiger Direct and Radio Shack. You can also get these cables from retailers such as Amazon.
Introduction on pc-pc communication?
try a null modem serial connection
When is a null modem cable used?
To exchange data between two DTE devices
Which type of links are used for a connection between two DTE devices?
null modem
What is null modem cable and what is often used for?
A null modem cable is a type of serial cable that connects two devices directly, allowing them to communicate without a modem. It typically links two computers or devices by crossing the transmit and receive lines, enabling data transfer between them. Null modem cables are often used for direct device-to-device communication in applications like data transfer, programming embedded systems, or connecting older hardware that relies on serial communication protocols.
What is the purpose of a null modem cable?
A null modem is a cable connecting two serial ports with the input and outputs and device control lines crossed over, so the input pin on one port is connected to the output pin on the other, and so on. It is also called a 'cross-over cable'. A null modem allows two computers to be connected together using their serial ports without using modems (hence null modem). If you used a standard ('straight') serial cable, the two inputs would be connected together, and the two outputs, and so on, so the computers would not be able to communicate. Modems have their data and control pins reversed internally, so a 'straight' cable is used between a computer and a modem.
How can you connect two computers physically?
You can use a null-modem cable; alternately, you can use a USB or FireWire cable.
What is the code for null on moparscape?
The code for null on moparscape is a big white bar at the top of the screen, then click help and go to item codes. It is at least six numbers.
What is the purpose of a modem cable?
The purpose of a null-modem cable is to permit two RS-232 "DTE" devices to communicate with each other without modems or other communication devices (i.e., "DCE"s) between them.
