Path: utzoo!utgpu!jarvis.csri.toronto.edu!cs.utexas.edu!wuarchive!decwrl!ucbvax!UUNET.UU.NET!ncrlnk!ncrcce!mercer From: ncrlnk!ncrcce!mercer@UUNET.UU.NET (Dan Mercer) Newsgroups: comp.lang.asm370 Subject: Re: CTCAs Message-ID: <8912022112.AA12147@brazos.rice.edu> Date: 2 Dec 89 19:03:06 GMT Sender: daemon@ucbvax.BERKELEY.EDU Reply-To: IBM 370 Assembly Programming Discussion List Distribution: inet Organization: The Internet Lines: 30 In article <89334.194519CMH117@PSUVM.BITNET> CMH117@PSUVM.BITNET (Charles Hannum) writes: :I know this really isn't revelant to the group, but you're all probably :using IBM 'frames anyway, and there is no group pertaining to VM/CMS. :So, here goes: : : Exactly what *are* Channel-To-Channel Adapters (CTCAs), and what do : they (and CP COUPLE) do? : :Any info (other than the useless IBM help files) would be appreciated. : :-- :- Charles Martin Hannum II "Klein bottle for sale ... inquire within." : (That's Charles to you!) "To life immortal!" : cmh117@psuvm.{bitnet,psu.edu} "No noozzzz izzz netzzzsnoozzzzz..." : c9h@psuecl.{bitnet,psu.edu} "Mem'ry, all alone in the moonlight ..." Normally, physical lines are attached to Channels. An RSCS connection or a VM PassThru line might connect to another machine at 9.6 Kb. If the two machines are located close enough (usually <= 100 ft) a CTCA can be used to connect the two machines, allowing for a much higher transfer rate. There's also a Virtual CTCA. A VCTCA, which is software, allows you to connect two "machines" residing in the same physical box (i.e. VM yo MVS). -- Dan Mercer Reply-To: mercer@ncrcce.StPaul.NCR.COM (Dan Mercer)