John I only noticed the third time of looking. z/CS is short for z/OS Communications Server which has an SNA side - VTAM - and an IP side, the successor to TCP/IP for MVS.
The TN3270 server function - now a separate address space - has adopted VTAM's Unformatted System Services in order to allow a prettier and more flexible means of soliciting the application with which a session will be set up concatenated to the TN3270 TCP connection. Because they have cut loose with an enhancement not also adopted by VTAM, the "ownership" of the USS function is cast somewhat into doubt. Apart from the misuse angle causing confusion when the initials USS are seen, there is a possibility for ambiguity when the topic under discussion is the z/OS Communications Server TELNET servers. > ... TCPIP is a UNIX based application. Not really. UNIX System Services has got involved with the Communications Server (CS) IP component over the years and, I expect, will into the future. However, it started before UNIX System Services and its predecessors appeared - or perhaps about the same time but was completely independent. Consequently, I expect you could run CS IP and have nothing to do with anything touched by UNIX System Services. Can anybody still reading verify this? Chris Mason On Fri, 31 Jul 2009 15:02:38 -0500, McKown, John <[email protected]> wrote: >> -----Original Message----- >> From: IBM Mainframe Discussion List >> [mailto:[email protected]] On Behalf Of Patrick O'Keefe >> Sent: Friday, July 31, 2009 2:54 PM >> To: [email protected] >> Subject: Re: USS misuse >> >> On Fri, 31 Jul 2009 09:47:55 -0500, McKown, John >> <[email protected]> wrote: >> >> >... >> >How are VTAM Unformatted System Services and z/OS UNIX System >> >Services the same context? ... >> >> Because it is not "VTAM" Unformatted System Services any more. >> It is z/CS Unformatted System Services, and once the context is >> TCP/IP both Unix System Services and Unformatted System Services >> are appropriate. >> >> This whole thread exists because people reading a posting picked >> the wrong context! >> >> Pat O'Keefe > >OK, that's a new use to me. I'll go look. But, to me, UNIX is not TCPIP or VTAM, but I can see some possibility of confusion since TCPIP is a UNIX based application. Thanks for the update. > >-- >John McKown ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [email protected] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
