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Chart 3. Modem DB25 Connector to Master Port
Async Modem
Serial Port
DB25 Connector
2
3
4
5
7
8
20
* Pins are tied together inside the 232XS5, they are not
connected to ports A, B, C, D, or E.
NOTE: When connecting a DTE device to ports A, B, C, D or E of
the smart switch, refer to Charts 8 and 9.
Chart 4. IBM PC DB25 Connector to Ports A - E (DTE)
IBM PC
Serial Port
DB25 Connector
2
3
4
5
6
7
8
20
* Pins are tied together inside the 232XS5, they are not connected
to the master port.
B-2
B&B Electronics -- PO Box 1040 -- Ottawa, IL 61350
Signal
Direction
<-----------
----------->
<-----------
----------->
<--------->
----------->
<-----------
Master port configured as a DCE port.
Signal
Direction
----------->
<-----------
----------->
<----------
<----------
<--------->
<-----------
----------->
Appendix B
PH (815) 433-5100 -- FAX (815) 433-5109
232XS5
Master Port (DTE)
DB9 Connector
3
2
6
4
5*
8
7
232XS5
Ports A - E (DTE)
DB9 Connector
2
3
8
7
6
5
4*
4*
232XS53800 Manual
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