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2. Rollover cable - Wikipedia

   en.wikipedia.org/wiki/Rollover_cable

   A rollover cable (also known as a Yost cable, Cisco cable, or a console cable) is a type of null-modem cable that is used to connect a computer terminal to a router's console port. This cable is typically flat (and has a light blue color) to help distinguish it from other types of network cabling.

3. Data Carrier Detect - Wikipedia

   en.wikipedia.org/wiki/Data_Carrier_Detect

   Frequent use of a serial port is for a direct computer-to-computer connection. This requires an adapter called a null modem, which isn't actually a modem in the traditional sense, but rather a connector plug that simply crosses the complementary pins on two serial ports so the two sides can communicate. A null modem typically connects the DTR ...

4. Serial port - Wikipedia

   en.wikipedia.org/wiki/Serial_port

   In modern serial ports using a UART integrated circuit, all these settings can be software-controlled. Hardware from the 1980s and earlier may require setting switches or jumpers on a circuit board. The configuration for serial ports designed to be connected to a PC has become a de facto standard, usually stated as 9600/8-N-1.

5. RS-232 - Wikipedia

   en.wikipedia.org/wiki/RS-232

   The current version of the standard is TIA-232-F Interface Between Data Terminal Equipment and Data Circuit-Terminating Equipment Employing Serial Binary Data Interchange, issued in 1997. The RS-232 standard had been commonly used with serial ports and serial cables. It is still widely used in industrial communication devices.

6. Null modem - Wikipedia

   en.wikipedia.org/wiki/Null_modem

   A null modem adapter. Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) using an RS-232 serial cable.The name stems from the historical use of RS-232 cables to connect two teleprinter devices or two modems in order to communicate with one another; null modem communication refers to using a crossed-over RS-232 cable to connect the teleprinters ...

7. Computer port (hardware) - Wikipedia

   en.wikipedia.org/wiki/Computer_port_(hardware)

   The user's response determines the purpose of the port, which is physically a 1/8" tip-ring-sleeve mini jack. Some auto-detect ports can even switch between input and output based on context. As of 2006, manufacturers have nearly standardized colors associated with ports on personal computers, although there are no guarantees.

8. Small Form-factor Pluggable - Wikipedia

   en.wikipedia.org/wiki/Small_Form-factor_Pluggable

   Switch and router manufacturers implementing QSFP+ ports in their products frequently allow for the use of a single QSFP+ port as four independent 10 Gigabit Ethernet connections, greatly increasing port density. For example, a typical 24-port QSFP+ 1U switch would be able to service 96x10GbE connections.

9. Serial cable - Wikipedia

   en.wikipedia.org/wiki/Serial_cable

   Serial cables are typically used for RS-232 communication. A serial cable or RS-232 cable is a cable used to transfer information between two devices using a serial communication protocol. The form of connectors depends on the particular serial port used. A cable wired for connecting two DTEs directly is known as a null modem cable.