prtCoverEntry OBJECT-TYPE
    SYNTAX     PrtCoverEntry
    MAX-ACCESS not-accessible
    STATUS     current
    DESCRIPTION
        "Information about a cover or interlock.
        Entries may exist in the table for each device
        index whose device type is `printer'."
    INDEX  { hrDeviceIndex, prtCoverIndex }
    ::= { prtCoverTable 1 }

prtCoverDescription OBJECT-TYPE
    SYNTAX     OCTET STRING (SIZE(0..255))
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
        "The manufacturer provided cover
         sub-mechanism  name in the
         localization specified by
         prtGeneralCurrentLocalization."
    ::= { prtCoverEntry 2 }

prtCoverStatus  OBJECT-TYPE
    --  This value is a type 2 enumeration
    SYNTAX     INTEGER {
                   other(1),
                   doorOpen(3),
                   doorClosed(4),
                   interlockOpen(5),
                   interlockClosed(6)
               }
    MAX-ACCESS read-only
    STATUS     current
    DESCRIPTION
        "The status of this cover sub-unit."
    ::= { prtCoverEntry 3 }

##</code><code>##

use Net::SNMP;
use strict;

my %oid = (
    prtCoverStatus => '1.3.6.1.2.1.43.6.1.1.3',
    prtCoverDescription => '1.3.6.1.2.1.43.6.1.1.2',
);

my %prtCoverStatusEnum = (
    1 => 'other(1)',
    3 => 'doorOpen(3)',
    4 => 'doorClosed(4)',
    5 => 'interlockOpen(5)',
    6 => 'interlockClosed(6)',
);

sub query_printer( $ ) {
    my ( $printer_ip ) = @_;

    my ( $session, $error ) = Net::SNMP->session(
        -hostname => $printer_ip,
        -community => 'public',
        -version => 1,
    );

    die( "Could not create session: $error" ) if ( ! $session );

    my $index = "0";
    while ( 1 ) {
        my @oidlist = ( $oid{prtCoverStatus} . ".$index" );
        my $result = $session->get_next_request(
            -varbindlist => \@oidlist,
        );

        if ( ! $result ) {
            last; # maybe there are no more objects
        }

        # we expect just one key to be returned
        my $prtCoverStatus = undef;
        foreach ( keys %{$result} ) {
            if ( $_ =~ 
                 m/^\Q$oid{prtCoverStatus}\E\.([^.])\.([^.])+$/ ) {
                my $hrDeviceIndex = $1;
                my $prtCoverIndex = $2;
                $index = "$hrDeviceIndex.$prtCoverIndex";
                $prtCoverStatus = $result->{$_};
                last;
            }
        }

        if ( ! $prtCoverStatus ) {
            last; # we've probably come to the end of the table
        }

        # now get other objects from the SAME TABLE
        @oidlist = ( $oid{prtCoverDescription} . ".$index" );
        $result = $session->get_request(
            -varbindlist => \@oidlist,
        );

        if ( ! $result ) {
            die( "Error getting object with index $index: "
                 . $session->error() );
        }

        my $prtCoverDescription = $result->{$oidlist[0]};

        if ( exists( $prtCoverStatusEnum{$prtCoverStatus} ) ) {
            $prtCoverStatus = $prtCoverStatusEnum{$prtCoverStatus};
        }

        print( "Cover description: $prtCoverDescription\n" );
        print( "           status: $prtCoverStatus\n" );
        print( "\n" );
    } # while there are rows in the SNMP cover table

    $session->close();
} # query_printer

foreach ( "10.0.0.11", "10.0.0.12" ) {
    print( "QUERYING PRINTER $_\n" );
    query_printer( $_ );
}

##</code><code>##

C:\temp>perl -w checkprintercover.pl
Cover description: Copier cover
           status: doorClosed(4)

Cover description: Finisher cover
           status: doorClosed(4)