I was told by a briefer that T/ prefix is no longer being used. He said only prefix now is H/ for heavy. Looked in our latest Jepp revision AIM 5-1-7 and sure enough it has been removed. Doesn't ATC want to know that we are TCAS (II) equipped and will respond accordingly? Also on ICAO flight plans how do you indicate TCAS equipment. I have always used /Z for other equipment and noted it line 18 for other information.