DRA-45 & DRA-45M DB9 Female Pinout:

1 = Main TX Audio

2 = Not Used - (AllStar hardware COS input when JU3 is installed)

3 = PTT

4 = Not Used - (AllStar hardware CTCSS input when JU4 is installed)

5 = RX Audio

6 = Ground

7 = Local Control or Alarm Trip

8 = Auxillary TX Audio when JU5 is installed

9 = External Power for the Audio Amps (when JU2 is in the "B" position)

See the Jumper Settings page for complete jumper assignments and 
what they do.