RS-232 - RS-232 connection between two DTE devices. Wiring diagram

This cable allows you to connect two DTE devices (for instance two desktops or external devices).

	D25 pin connector on Side 1
	D25 pin connector on Side 2

	RS-232 DB25-1	RS-232 DB25-2
Receive Data	3	2	Transmit Data
Transmit Data	2	3	Receive Data
Data Terminal Ready	20	6+8	Data Set Ready + Carrier Detect
System Ground	7	7	System Ground
Data Set Ready + Carrier Detect	6+8	20	Data Terminal Ready
Request to Send	4	5	Clear to Send
Clear to Send	5	4	Request to Send

Note: It is necessary to jumper DSR & CD to show that another side (computer or device) is online.

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RS-232 - RS-232 related links

- If your devices use other connectors (for example, DB-9 pin) look here: RS232 to RS232 connection using DB9 connectors.
- Serial port - Serial port. Possible connections. DTE-DCE, DTE-DTE.
- RS232 port connector with all pins.