>
> Eero Laurila - HP CSY Networking lab, NS services, wrote among a lot of good
> stuff:
> >
[Lot of good stuff snipped]
> >
> Well Eero, first let me thank you for your interest on this issue. I cheer
> up when one vendor rep steps in to help. Next, let me detail the tests we
> have done so far. I do not surrender easy, (I love problem solving) and if
[Lot of Rodolfo's efforts snipped]
>
> My question is, is there something else to look for? Are we neglecting
> something on the DTC ? It is not just me or our site. I got several replies
> from other Intermec printer users. So, with your influence and direct access
> to the proper channels, maybe you can assist us in trying to solve the
> riddle. If necessary, I can issue the call and then give you the reference
> number.
>
> Best Regards,
> [log in to unmask]
>
Ok, we've all suggested the things to test, which don't seem to have worked.
SOOO!! Break out the data scope/protocol analyzer, e.g., HP 4952. Plug it in
at the DTC end of the cable and start the data flow with the original setup,
not the new COBOL program. Two questions will be answered immediately.
1) Did the Intermec printer send a suitable XOFF?
2) Did the HP-3000 stop transmitting data until receiving an XON?
If (1) is false, fix the printer! If (2) is false, call the HP RC!
What makes question (1) true? The Intermec must send an XOFF with hex value 13,
not 93(=80+13, i.e., parity bit = 1).
What makes question (2) true? The HP must stop transmitting within one to three
characters of receiving the XOFF. The Intermec must allow these few characters
of run-on from the HP-3000. It's not viable to send an XOFF when your buffer is
100% full, you send one when your buffer is x% full where x < 100. Verify with
Intermec what their XOFF strategy is.
 
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Ross Scroggs                         email: [log in to unmask]
Telamon, Inc.                          CIS: 76011,2234
492 Ninth Street, Suite 310          voice: 510-987-7700
Oakland, CA 94607-4098                 fax: 510-987-7009
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