### DB-25 4-Wire Hardware Handshaking (DTR) Cable

The following four-wire cable is often sufficient for an older terminal, printer, or other DTE device configured for DTR (hardware) flow control. However, some terminals and printers may use a signal other than DTR for flow control. In addition, some terminals and printers may have other cable requirements. Consult your terminal or printer manual for this information. For more universal compatibility, use a fully-wired DB-25 terminal/printer cable.

##### Terminal/Printer Cable with DTR Handshaking

DB-25 Female (Digi End) |  | DB-25 Male (Peripheral)
--- | --- | ---
Signal | Pin | Pin | Signal
TxD | 2 | connected to | 3 | RxD
RxD | 3 | connected to | 2 | TxD
CTS | 5 | connected to | 20 | DTR
SG | 7 | connected to | 7 | SG
GND | Shell | connected (via shield) to | Shell | GND
| jumpered | 4+5 | RTS+CTS

Important: Some terminal or printer manufacturers may use different methods of flow control. Consult your documentation for specific wiring requirements.