(12.5k●6●195●201)
Jan 20 '16, 4:26 p.m.
the release level support has always been n-1.. so the 5.x clients will connect to 6.x server, but the 4.x client will not
https://jazz.net/help-dev/clm/index.jsp?re=1&topic=/com.ibm.jazz.install.doc/topics/c_n-1.html&scope=null