US Robotics MP/X


 Digi RJ45 10-pin                        US Robotics RJ45 8-pin 
  
 DSR  (2)  - - - - - - - - - - - - - - - - - - -   (1)  RI           
 RTS  (3)  - - - - - - - - - - - - - - - - - - -   (8)  RTS
 GND  (4)  - - - - - - - - - - - - - - - - - - -   No Pin   
 TxD  (5)  - - - - - - - - - - - - - - - - - - -   (6)  TxD
 RxD  (6)  - - - - - - - - - - - - - - - - - - -   (5)  RxD 
 SG   (7)  - - - - - - - - - - - - - - - - - - -   (4)  SG  
 CTS  (8)  - - - - - - - - - - - - - - - - - - -   (7)  CTS 
 DTR  (9)  - - - - - - - - - - - - - - - - - - -   (3)  DTR 
 DCD  (10) - - - - - - - - - - - - - - - - - - -   (2)  DCD

Having made the cables following the above pin out you must have
the S58=1 command saved into NVRAM.  The modem will interpret the     
RI line on the modem as the DSR signal.  If you have questions 
concerning this, please contact US Robotics.


Digi DB25                                US Robotics RJ45 8-pin
  
 TxD  (2)  - - - - - - - - - - - - - - - - - - -   (6)  TxD
 RxD  (3)  - - - - - - - - - - - - - - - - - - -   (5)  RxD 
 RTS  (4)  - - - - - - - - - - - - - - - - - - -   (8)  RTS
 CTS  (5)  - - - - - - - - - - - - - - - - - - -   (7)  CTS 
 DSR  (6)  - - - - - - - - - - - - - - - - - - -   (1)  RI 
 SG   (7)  - - - - - - - - - - - - - - - - - - -   (4)  SG  
 DCD  (8)  - - - - - - - - - - - - - - - - - - -   (2)  DCD
 DTR  (20) - - - - - - - - - - - - - - - - - - -   (3)  DTR 

Having made the cables following the above pin out you must have
the S58=1 command saved into NVRAM.  This will enable RI to be 
switched to DSR.  If you have questions concerning this, please
contact US Robotics.