Need programing cable connection of SD-171

i have maxon radion sd 171
http://www.rfwiz.com/Maxon/DataRadio..._DataRadio.htm

but i do nto own a programing cable .

i am trying to program the radio but it is not working . can some one help me regarding this ,

i have the programing software but do not know the detail of the data cable .

i really need the diagram of this cable

Added after 5 hours 16 minutes:


after many hours works i am able to make a maxon sd 171 programing cable thus saving about 50 Dollars

Do you have a schematic that you can share ?