Inside Out Networks RS232 DB9 Diagnostics Loop-back plug for Edgeport/2,4,8.

RTS to CTS,RI (Pin 7,8,9)
DTR to DSR,CD (Pin 1,4,6) 
TXD to RXD    (Pin 2,3)


             RS232 DB9 Connector

DB-9M 	     Function 		  Abbreviation
------	-------------------	----------------
Pin #1 	Data Carrier Detect 	      CD 
Pin #2 	Receive Data 		RD or RX or RXD 
Pin #3 	Transmitted Data 	TD or TX or TXD 
Pin #4 	Data Terminal Ready 	      DTR 
Pin #5 	Signal Ground 		      GND 
Pin #6 	Data Set Ready 		      DSR 
Pin #7 	Request To Send 	      RTS 
Pin #8 	Clear To Send 		      CTS 
Pin #9 	Ring Indicator 		      RI 



Inside Out Networks RS422 DB9 Diagnostics Loop-back plug for Edgeport/2i,4i,8i.

T+ to R+ (Pin 7,4) 
T- to R- (Pin 3,8)