Re: Twinax issues on new 820

["Jim Franz" <franz400@xxxxxxxxxxxx>]

It's info apar II11804, release for V4R3
has full set of instructions & explains why.
too large to clip here.
title: OSP TWINAX WORK STATION ADAPTER DISABLE

Also noticed in Knowledge Base, if any Client Access on a port
has the 2X (double speed) mode set to disable, all devices on that port
will run at 1X (the original speed)
hth
jim franz
----- Original Message -----
From: "Kirk Goins" <kirkg@pacinfosys.com>
To: <midrange-l@midrange.com>
Sent: Sunday, March 17, 2002 10:13 PM
Subject: Twinax issues on new 820


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

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