I had some problems with this some years ago. So, I learn something...
CNC-CTC (SCTC) are for ESCON channels.
The 3088 (or BCTC) are for parallel channels, a pair at each side.
FICON channels can be defined both as FCTC, and can be one at each side,
not necessary a pair.
And with a Ficon Director, we can share a unique FICON channel, defining
two or more LCUs, one for each LPAR. There are a document about this
somewhere into the IBM world.
Regards,
Clovis



                                                                       
             Rob van der Heij                                          
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                                       Re: LPAR to LPAR communication  
                                                                       
             02/02/2009 16:35                                          
                                                                       
                                                                       
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On Mon, Feb 2, 2009 at 7:06 PM, Mark Pace <[email protected]> wrote:

> If you're using a FICON chpid can't you just share the CHPID and control
> unit?  I didn't think a physical cable was require for FICON FCTC.

I think that with FICON you also need a CNC and CTC device to couple.
The CNC type chpid definition tells the channel to play control unit
too. But I'm willing to learn...

Lets have some beers and I will tell you stories about real 3088
devices ;-)

Rob

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