So I've been through a few different cables and am now confused as to which cables are actually proper for my TM-T85.
Shopping around I have noticed there are different pinouts for 'null modem cables' Do they all work the same? If not isn't suggesting someone use a Null Modem Cable somewhat 'Null'?

DB9 to Db25's have 2 and 3 straight through, DB9 to DB9 have 2 and 3 crossed. DB25 to DB25's are all different.

I'll buy the dang stuff through BPA but help me help you, what is the proper pinout if it's such a standard item?