Ok every dealer is different with the code they like to use. I for one am not going to detail what is code for what in my area on an open online board for any cop to educate themself with.
Code changes as the cops learn what you really mean when you say something.
I dont use a dealer since they are for ppl who dont have any solid contacts who are friends who can set them up when the need arises.
I would say if you got the number of a dealer from someone then they would tell you how to go about it. And nobody I know will just answer the phone and set up a deal with a stranger dude. That spells instant bust copper.