Benson 1625-S interface cable (serial)

       D25 (male)  D9 (female)
 
red      8 CD ----- 1 CD
orange   3 RD ----- 2 RD
yellow   2 TD ----- 3 TD
green   20 DTR ---- 4 DTR
blue     7 SG ----- 5 SG
violet   6 DSR ---- 6 DSR
brown    4 RTS ---- 7 RTS
grey     5 CTS ---- 8 CTS
black   22 RI ----- 9 RI