![]() ![]() This cable can be used to connect two DDS CSU/DSU (i.e., DSU) products in a back-to-back configuration. This pinout is the same for both a RJ-45 plug and RJ-45 jack.įigure 5 shows the pinout for building a DDS crossover cable. ![]() This cable can be used to connect two T1 CSU/DSU (i.e.,TSU) products in a back-to-back configuration.įigure 4 shows the pinout for building a DDS loopback adapter. Data Terminal signals the Data Set to prepare for data transmission. Carries data from the Data Set to the Data Terminal. Carries data from the Data Terminal to the Data Set. This pinout is the same for both a RJ-45 plug and RJ-45 jack.įigure 3 shows the pinout for building a T1 crossover cable. 25-pin serial pinout: Pin 1: GND Shield Ground. There are eight pins total in a RJ-45 connector.įigure 2 shows the pinout for building a T1 loopback adapter. This document shows the necessary pinout for building them.įigure 1 shows a how to orient a standard RJ-45 to RJ-45 silver satin cable to determine pin 1. ![]() Ethernet crossover cable diagram The receive data pair (the two wires designated RXD2) must be a twisted pair. The transmit data pair (designated TD) must be a twisted pair. Loopback adapters and crossover cables are useful tools for troubleshooting both DDS & T1 circuits. Ethernet Crossover (MDI-X) cable diagram: The receive data pair (the two wires designated RD) must be a twisted pair. Use the standard pinout on both ends if a staight cable is required, for a crossover use the standard on one end and a crossover on the other. Loopback Adapters and Crossover Cables for T1 and DDS Circuits Download Crossover Patch Cord Pinout Free Software > DOWNLOAD Ethernet connectivity The standards and pin- out specification appear to be related and interchangeable, but are not the same and should not be used interchangeably. ![]()
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