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From: mercer@ncrcce.StPaul.NCR.COM (Dan Mercer)
Newsgroups: comp.lang.asm370
Subject: Re: CTCAs
Message-ID: <1765@ncrcce.StPaul.NCR.COM>
Date: 2 Dec 89 19:03:06 GMT
References: <89334.194519CMH117@PSUVM.BITNET>
Reply-To: mercer@ncrcce.StPaul.NCR.COM (Dan Mercer)
Organization: NCR Comten, Inc.
Lines: 29
Keywords:

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)