Re^3: Telnet Output

[jmutton]

my %snr;
while ( my $line = shift @lines ) {
    chomp $line;
    # (US0,--) 0.1 dB
    if ( $line =~ m/SNR Margin:\s*(\d+)\s+(\d+)\s*\(US0,--\) 0.1 dB/ )
+ {
        ( $snr{us0} ) = ( $1 );
    }
    # (US1,DS1) 0.1 dB
    if ( $line =~ m/SNR Margin:\s*(\d+)\s+(\d+)\s*\(US1,DS1\) 0.1 dB/ 
+) {
        ( $snr{us1}, $snr{ds1} ) = ( $1, $2 );
    }
    # (US2,DS2) 0.1 dB
    if ( $line =~ m/SNR Margin:\s*(\d+)\s+(\d+)\s*\(US2,DS2\) 0.1 dB/ 
+) {
        ( $snr{us2}, $snr{ds2} ) = ( $1, $2 );
    }
    # (US3,DS3) 0.1 dB
    if ( $line =~ m/SNR Margin:\s*(\d+)\s+(\d+)\s*\(US3,DS3\) 0.1 dB/ 
+) {
        ( $snr{us3}, $snr{ds3} ) = ( $1, $2 );
    }
    # (US4,DS4) 0.1 dB
    if ( $line =~ m/SNR Margin:\s*(\d+)\s+(\d+)\s*\(US4,DS4\) 0.1 dB/ 
+) {
        ( $snr{us4}, $snr{ds4} ) = ( $1, $2 );
    }
}

print q{US0:}, $snr{us0}, qq{\n};
print q{US1:}, $snr{us1}, q{ }, q{DS1:}, $snr{ds1}, qq{\n};
print q{US2:}, $snr{us2}, q{ }, q{DS2:}, $snr{ds2}, qq{\n};
print q{US3:}, $snr{us3}, q{ }, q{DS3:}, $snr{ds3}, qq{\n};
print q{US4:}, $snr{us4}, q{ }, q{DS4:}, $snr{ds4}, qq{\n};

Thats what I've managed to come up with. But I need some sort of checking as some of the SNRs will report 0 or N/A. Need it to report 0 instead of N/A.