What is serial DCE and DTE cable?
There are two types of devices that can communicate over a serial interface: DCE and DTE. A DCE provides a physical connection to a network and forwards traffic. A DTE connects to a network through a DCE device. Typically, a DTE device is connected to a DCE device (or vice versa) rather than another DTE device.
Which pairs are swapped in a crossover cable?
One terminal may be connected directly to another without the use of a switch or hub, but in that case, the crossover must be done in the cabling. Since 10BASE-T and 100BASE-TX use pairs 2 and 3, these two pairs must be swapped in the cable. This wiring scheme constitutes a crossover cable.
What is a serial crossover 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. For this to happen, the Transmit (TXD) and Receive (RXD) pins on one of the serial connectors are flipped.
How are DTE and DCE wired using RS-232?
Because the RS232 specification mainly involves connecting a DTE directly to a DCE and vice versa, the pinouts are defined so that cabling is simple. That is, a cable connected a computer to a modem by wiring pin 1 to pin 1, pin 2 to pin 2, and so on. This method is known as straight-through cabling.
What type of cable is serial DCE?
Serial printer cables are used to establish connection between a computer and printer through a serial port. This cable is configuration specific; that is, a 9-25 pin cable is used when both printer and computer act as DTE and a 25-25 pin cable is used when computer and printer act as DTE and DCE, respectively.
What is a serial DCE cable used for?
This common serial cable is used between a DTE and DCE–that is, data terminal equipment and data communications equipment respectively. In communications terminology, DTE refers to terminating/initiating point of session and DCE means forwarding point of a communication session.
What is the use of serial DTE and serial DCE wire in PT?
DCE provides a clock signal, and DTE uses this provided signal for all its synchronization.
How do you tell if a serial cable is straight through?
If every pin is electrically connected to the corresponding pin on the other end, i.e.: pin 1 to pin1, pin 2 to pin 2, etc. then the cable is straight through.
Is a serial cable straight through?
A standard serial cable, also called an AT cable, has the wires inside the cable running straight through. Take a DB9 cable as an example. Pin 1 on one end of the cable would be connected to Pin 1 on the other end.