Is a null modem cable straight through?

The pinout of the serial connectors on both sides of the cable are exactly the same with a straight-through serial cable. A null modem serial cable (frequently called a crossover cable) is used to connect two DTE devices together without the use of a DCE device in between.

What is null modem crossover?

A Null Modem or “crossover” cable is used to connect to DTE devices together. For this to work, the Transmit (TxD) pin of one device needs to be connected to the Receive (RxD) pin of the other device, and vice versa. Null modem adapters can also be used at the end of a straight-through serial cable to cross the lines.

When would you use a null modem cable?

The null modem cable (crossover cable) should be used when interfacing between a serial port and a DTE device. To enable handshaking between the two devices, the Request to Send (RTS) pin of one device must be connected to the Clear to Send (CTS) pin of the other device.

What is a null modem Adaptor?

A null modem is a specially designed cable that allows a “head-to-head” connection between two nearby serial devices (computers) through their communication ports (RS-232).

How do I connect DTE to DTE?

Hence a direct PC to PC Ethernet connection can also be called a DTE to DTE communication. This communication is done via an Ethernet crossover cable as opposed to a PC to DCE (hub, switch, or bridge) communication which is done via an Ethernet straight cable.

Is serial port male or female?

Gender. Generally, serial port connectors are gendered, only allowing connectors to mate with a connector of the opposite gender. With D-subminiature connectors, the male connectors have protruding pins, and female connectors have corresponding round sockets.

What is a DTE connection?

Data terminal equipment (DTE) is an end instrument that converts user information into signals or reconverts received signals. These can also be called tail circuits. A DTE device communicates with the data circuit-terminating equipment (DCE).

What is a null modem connection * 1 point?

Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) With a null modem connection the transmit and receive lines are crosslinked. Depending on the purpose, sometimes also one or more handshake lines are crosslinked.

What is the purpose of a null modem cable?

A null modem cable allows you to connect your PC to another nearby PC or serial device using its modem protocol. A popular use of null modem cables is for setting up “head-to-head” gaming between two players at different computers in the same room. (A null modem cable is limited to 30 feet in length.)

What does null modem mean?

Null Modem. Definition – What does Null Modem mean? A null modem is a specially designed cable that allows a “head-to-head” connection between two nearby serial devices (computers) through their communication ports (RS-232).

What is a null cable modem?

Null modem. Null modem is a communication method to directly connect two DTEs (computer, terminal, printer, etc.) using an RS-232 serial cable.

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