
12 Chapter 4 EIA-232: DB-25 to DB-25
Terminal/Printer Cable with DTR Handshaking
Note: Some terminal or printer manufacturers may use different methods of
flow control. Consult your documentation for specific wiring
requirements.
DB-25 Hardware Handshaking (RTS/CTS) Cable
The following cable is often sufficient for a terminal, printer, or other DTE
device configured for RTS/CTS (hardware) flow control. However, 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 RTS/CTS Handshaking
Note: Some terminal or printer manufacturers may use different methods of
flow control. Consult your documentation for specific wiring
requirements.
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
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
RTS 4 connected to 5 CTS
CTS 5 connected to 4 RTS
DSR+DCD 6+8 connected to 20 DTR
SG 7 connected to 7 SG
DTR 20 connected to 6+8 DSR+DCD
GND Shell connected (via shield) to Shell GND
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