355adapter.pdf (application/pdf Object)
I think the one I previously mentioned is wrong. The DB9 flavor (which is probably the one you want, now-a-days) is like this:
Avaya 355AF adapter to DB 9
1 blue to 9
2 orange to 1, 6, 8 (you really only need to connect it to pin 1)
3 black to 4
4 red to 5
5 green to 2
6 yellow to 3
7 brown not used
8 white not used