PMP Mail Archive: Re: PMP> Re: Requested change to HR MIB

PMP Mail Archive: Re: PMP> Re: Requested change to HR MIB

Re: PMP> Re: Requested change to HR MIB

Ron Bergman (rbergma@dpc.com)
Wed, 25 Aug 1999 17:40:11 -0700 (Pacific Daylight Time)

Steve and Lloyd,

This is very good! The removal of the "advice" text should also remove
all of the confusion we encountered.

Ron Bergman
Hitachi Koki Imaging Solutions

On Wed, 25 Aug 1999, Steve Waldbusser wrote:

>
> If we did this, the appropriate text would look like that below. Note that this
> also deletes the advice on setting hrDeviceStatus based on hrPrinterStatus values,
> which would also be problematic.
>
> Steve
>
> hrPrinterStatus OBJECT-TYPE
> SYNTAX INTEGER {
> other(1),
> unknown(2),
> idle(3),
> printing(4),
> warmup(5)
> }
> MAX-ACCESS read-only
> STATUS current
> DESCRIPTION
> "The current status of this printer device."
> ::= { hrPrinterEntry 1 }
>
>
> hrPrinterDetectedErrorState OBJECT-TYPE
> SYNTAX OCTET STRING
> MAX-ACCESS read-only
> STATUS current
> DESCRIPTION
> "This object represents any error conditions detected
> by the printer. The error conditions are encoded as
> bits in an octet string, with the following
> definitions:
>
> Condition Bit #
>
> lowPaper 0
> noPaper 1
> lowToner 2
> noToner 3
> doorOpen 4
> jammed 5
> offline 6
> serviceRequested 7
> inputTrayMissing 8
> outputTrayMissing 9
> markerSupplyMissing 10
> outputNearFull 11
> outputFull 12
> inputTrayEmpty 13
> overduePreventMaint 14
>
> Bits are numbered starting with the most significant
> bit of the first byte being bit 0, the least
> significant bit of the first byte being bit 7, the
> most significant bit of the second byte being bit 8,
> and so on. A one bit encodes that the condition was
> detected, while a zero bit encodes that the condition
> was not detected.
>
> This object is useful for alerting an operator to
> specific warning or error conditions that may occur,
> especially those requiring human intervention."
> ::= { hrPrinterEntry 2 }
>
>
>
> lpyoung@lexmark.com wrote:
>
> > Steve,
> > Another solution would be to delete the hrDeviceStatus column from
> > the description of hrPrinterDetectedErrorState. This column caused
> > alot of confusion in our interoperability testing and I am not sure
> > the clarifying text will solve the problem. It is also becoming
> > more common than not that a printer will keep running even with
> > "no paper". What was "typically appropriate" a year or so ago is
> > changing rapidly in the printer world.
> > Lloyd
> >
> > waldbusser%ins.com@interlock.lexmark.com on 08/23/99 03:53:03 PM
> >
> > To: hostmib%andrew.cmu.edu@interlock.lexmark.com
> > cc: (bcc: Lloyd Young/Lex/Lexmark)
> > Subject: PMP> Re: Requested change to HR MIB
> >
> > This problem was solved a different way.
> >
> > The new text (ini the current draft) clarifies that "The hrDeviceStatus column
> > shows the hrDeviceStatus which is typically appropriate when such an error
> > condition exists." In other words, there isn't a strict algorithmic
> > translation between errorState bits and deviceStatus. deviceStatus should be
> > set based on the operational status of the printer. errorState bits should be
> > set based on any detected errors. If the noPaper condition is set but the
> > printer is still able to run, this would be highly unusual, but OK. The
> > deviceStatus column just suggests the most likely condition.
> >
> > Adding warning or down to all rows is less useful and actually provides less
> > flexibility than implementors might need.
> >
> > Steve
> >
> > > From: lpyoung@lexmark.com
> > >
> > > Please change the description of hrPrinterDetectedErrorState:
> > >
> > > Original Text
> > > Condition Bit # hrDeviceStatus
> > >
> > > lowPaper 0 warning(3)
> > > noPaper 1 down(5)
> > > lowToner 2 warning(3)
> > > noToner 3 down(5)
> > > doorOpen 4 down(5)
> > > jammed 5 down(5)
> > > offline 6 down(5)
> > > serviceRequested 7 warning(3)
> > > inputTrayMissing 8 warning(3)
> > > outputTrayMissing 9 warning(3)
> > > markerSupplyMissing 10 warning(3)
> > > outputNearFull 11 warning(3)
> > > outputFull 12 warning(3)
> > > inputTrayEmpty 13 warning(3)
> > > overduePreventMaint 14 warning(3)
> > >
> > > Revised Text
> > > Condition Bit # hrDeviceStatus
> > >
> > > lowPaper 0 warning(3) or down(5)
> > > noPaper 1 warning(3) or down(5)
> > > lowToner 2 warning(3) or down(5)
> > > noToner 3 warning(3) or down(5)
> > > doorOpen 4 warning(3) or down(5)
> > > jammed 5 warning(3) or down(5)
> > > offline 6 warning(3) or down(5)
> > > serviceRequested 7 warning(3) or down(5)
> > >
> > > inputTrayMissing 8 warning(3) or down(5)
> > > outputTrayMissing 9 warning(3) or down(5)
> > > markerSupplyMissing 10 warning(3) or down(5)
> > > outputNearFull 11 warning(3) or down(5)
> > > outputFull 12 warning(3) or down(5)
> > > inputTrayEmpty 13 warning(3) or down(5)
> > > overduePreventMaint 14 warning(3) or down(5)
> > >
> > > Reason for change:
> > > The original text would seem to require all printers to respond
> > > identically in hrDeviceStatus on the same error condition. Reality
> > > is that different printers respond differently on the same error
> > > condition. What might be a warning in one printer may be a down
> > > condition in another printer. Even within a printer a single error
> > > condition might be a warning one time and a down condition another
> > > time. For example, several printers support the linking of multiple
> > > paper trays together to form one logical paper tray, when one of the
> > > linked trays runs out of paper the printer will start feeding paper
> > > from one of the other linked trays, the printer may report noPaper
> > > but it is a warning condition because paper is being fed from
> > > another tray.
> > >
> > > Lloyd
> > > ------------------------------------------------------------
> > > Lloyd Young
> > > Manager, Alliances and Complementary Project Development
> > > Consumer Printer Division Lexmark International, Inc.
> > > Dept. C88M/Bldg. 005-1 740 New Circle Road NW
> > > email: lpyoung@lexmark.com Lexington, KY 40550-0001
> > > Phone: (606) 232-5150 Fax: (630) 982-4032
> > >
> > > ----------------
>
>