Didn't IBM make these available as IBM manuals at some point. I think I used to have them (an IBMer bought me them as a present when I stopped working on stuff for IBM).
You may be referring to a Redbook: GG24-3376-06 It's 5 years old so it will miss some of the new stuff, but the 1000 pages do provide a good starting point for learning this. And writing your own TCP/IP client and server on the (same) CMS command line is a good way to see how it works. Rob -- Rob van der Heij Velocity Software, Inc http://velocitysoftware.com/
