The following three-wire cable is often sufficient for a terminal, printer, or other DTE device configured for software flow control.
| DB-9 Female (Digi End) |
DB-9 Male (Peripheral) |
|||
|---|---|---|---|---|
| Signal | Pin | Pin | Signal | |
|
TxD |
3 |
connected to |
2 |
RxD |
|
RxD |
2 |
connected to |
3 |
TxD |
|
SG |
5 |
connected to |
5 |
SG |
|
GND |
Shell |
connected (via shield) to |
Shell |
GND |
This cable is a three-wire null modem cable. Transmitted Data on one end of the cable is connected to Received Data at the other end, and vice versa. The male DB-9 end can be plugged directly into most serial terminals and printers without any adapters. The female DB-9 end plugs directly into any Digi DB-9 serial port.