PC-check Loopback
| Short pins in loopback connector |
Description |
| 1-4-9 | |
| 2-3 | |
| 6-7-8 |
CheckIt/Norton/PassMark Loopback
| Name | Short pins | Name | |
|---|---|---|---|
| CD | 1 | 4,6,9 | DSR |
| RXD | 2 | 3 | TXD |
| DTR | 4 | 6 | DSR |
| RTS | 7 | 8 | CTS |
Loopback, or loop-back, refers to the routing of electronic signals, digital data streams, or flows of items back to their source without intentional processing or modification. This is primarily a means of testing the transmission or transportation infrastructure. A communications transceiver can use loopback for testing its functionality. For example, a device transmit pin connected to its receive pin will result in the device receiving exactly what it transmits. Moving this looping connection to the remote end of a cable adds the cable to this test.
correct
incorrect