Twinax issues on new 820

["Kirk Goins" <kirkg@xxxxxxxxxxxxxx>]

First, I know the new twinax cards run at lower voltages and at faster transfer 
rates.

I just moved around 20 devices from twinax on a 500 to a new 820 using 2 of 
Omnitron's OmniMux 400 Express units via fiber. I'm using them in the mux-demux 
cfg. That is 4 ports come off the 820 twinax brick thru baluns into 4 ports on 
the source mux. The 2 muxs are connected via fiber. Then each port on the 
destination mux is patched to a OmniMux Star panel.  This is all as advertised 
in the manuals.

Once I get more than a few terms and printers up, they start dropping off. 
Eventually the mux on the source(400 side) finally locks up and needs a power 
reset.

I called Omnitron's 24/7 support line at 8:15am PST this Sunday morning. At 
12:25pm PST I get a call back. The tech tells me that the mux's can't handle 
the faster stuff and that I need to create a data area and put all zeros in it 
to cause the twinax controller to work only at 1mb rate. That catch is he's 60 
miles from his docs and can't tell me the name or anything else...

I've searched IBM and the MIDRANGE Archives and can't find a ref. I know I've 
seen talk about this. ANYONE have the details? I need to at least patch this 
puppy till I can chew on a Manager and some Marketing folks



__________________________________________________
Kirk Goins
IBM Certified iSeries Technical Solutions Design
IBM Certified iSeries Technical Solutions Implementation
Pacific Information Systems - An IBM Premier Business Partner
503-674-2985           kirkg@pacinfosys.com