PMP Mail Archive: Re: PMP> Console Lights

PMP Mail Archive: Re: PMP> Console Lights

Re: PMP> Console Lights

Stuart_Rowley@KEI-CA.CCMAIL.compuserve.com
Tue, 21 Jul 1998 15:32:01 -0400

Harry,

I believe the new wording makes sense for these objects if 1759 is not
considered, but I don't see the justification in changing the 0, 0 case from OFF
to Undefined when current implementations are considered.

Stuart

______________________________ Reply Separator _________________________________
Subject: PMP> Console Lights
Author: INTERNET:harryl@us.ibm.com at CSERVE
Date: 7/13/98 2:52 PM

I know it has been a very long time since this topic has been visited. I accept
that we changed the definition for prtConsoleOnTime and OffTime because the
previous definitions were misinterpreted. A recent reading, however, strikes me
as curious why we defined On=0 and Off=0 as undefined rather than "lights off"
as defined in RFC1759.

Again, it's not that I don't support the clarification, but this specific
wording would appear to "break" existing implementations for no reason. Can
someone say why we chose this wording?

OLD DEFINITION (RFC1759)
--------------

prtConsoleOnTime OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The on time in milliseconds of blinking of
this light; 0 indicates off always. If both
prtConsoleOnTime and prtConsoleOffTime are 0,
then the light is always off."
::= { prtConsoleLightEntry 2 }

prtConsoleOffTime OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"The off time in milliseconds of blinking of
this light; 0 indicates on always. If both
prtConsoleOnTime and prtConsoleOffTime are 0,
then the light is always off."
::= { prtConsoleLightEntry 3 }

NEW DEFINITION
--------------

prtConsoleOnTime OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object, in conjunction with
prtConsoleOffTime, defines the current status
of the light. If both prtConsoleOnTime and
prtConsoleOffTime are non-zero, the lamp is
blinking and the values presented define the on
time and off time, respectively, in
milliseconds. If prtConsoleOnTime is zero and
prtConsoleOffTime is non-zero, the lamp is off.
If prtConsoleOffTime is zero and
prtConsoleOnTime is non-zero, the lamp is on.
If both values are zero the status of the lamp
is undefined."
::= { prtConsoleLightEntry 2 }

prtConsoleOffTime OBJECT-TYPE
SYNTAX Integer32
MAX-ACCESS read-write
STATUS current
DESCRIPTION
"This object, in conjunction with
prtConsoleOnTime, defines the current status of
the light. If both prtConsoleOnTime and
prtConsoleOffTime are non-zero, the lamp is
blinking and the values presented define the on
time and off time, respectively, in
milliseconds. If prtConsoleOnTime is zero and
prtConsoleOffTime is non-zero, the lamp is off.
If prtConsoleOffTime is zero and
prtConsoleOnTime is non-zero, the lamp is on.
If both values are zero the status of the lamp
is undefined."
::= { prtConsoleLightEntry 3 }

Harry Lewis - IBM Printing Systems