InetDaemon.Com

Always have a breakout box on hand when building serial cables from scratch.

Direction	DTE DB-25 Pin #	Abbr.	NAME
---	1	--	Protection/chassis/frame ground (ground to shell)
	2	TxD	Transmitted Data
	3	RxD	Received Data
	4	RTS	Request To Send
	5	CTS	Clear To Send
	6	DSR	Data Set Ready (aka DCE Ready)
---	7	GND	Signal Ground
	8	DCD	Data Carrier Detect (aka Carrier Detect/CD)
---	9	--	Reserved
---	10	--	Reserved for data set testing
---	11	--	Unassigned
	12	SCF	Secondary Received Line Signal Detector
	13	SCB	Secondary Clear to Send
	14	SBA	Secondary Transmitted Data
	15	DB	Transmission Signal Element Timing (DCE Source
	16	SBB	Secondary Received Data
	17	DD	Receiver Signal Element Timing (DCE Source)
	18	--	Local Loopback
	19	SCA	Secondary Request to Send
	20	DTR	Data Terminal Equipment Ready
	21	CG	Signal Quality Detector
	22	--	Ring Indicator
	23	CH/CI	Data Signal Rate Selector
	24	DA	Transmit Signal Element Timing
	25	--	Test Mode

Received by DTE
Transmitted by DTE