B&B Electronics Five Port Expandable Smart Switch Chart 7. IBM PC DB9 Connector to Ports a E DCE

Chart 7. IBM PC DB9 Connector to Ports A - E (DCE)

Master port configured as a DTE port.

IBM PC			232XS5
Serial Port		Signal	Ports A - E (DCE)
DB9 Connector	Direction		DB9 Connector
1	<-----------		4*
2	<-----------		2
3	-----------	>	3
4	-----------	>	4*
5	<---------	>	5
6	<-----------		6
7	-----------	>	7
8	<-----------		8

*Pins are tied together inside the 232XS5, they are not connected to the master port.

Chart 8. IBM PC DB25 Connector to Ports A - E (DCE)

Master port configured as a DTE port with a modem connected (see Chart 3).

IBM PC			232XS5
Serial Port		Signal	Ports A - E (DCE)
DB25 Connector	Direction		DB9 Connector
2	-----------	>	3
3	<-----------		2
4	-----------	>	6
5	<-----------		4*
6	<-----------		4*
7	<---------	>	5
8	<-----------		8
20	-----------	>	7

*Pins are tied together inside the 232XS5, they are not connected to the master port.

B-4Appendix B232XS53800 Manual

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