librenms-librenms/includes/polling/os/pbn.inc.php

<?php

if (preg_match('/^Pacific Broadband Networks .+\n.+ Version ([^,]+), .+\n.+\n.+\nSerial num:([^,]+), .+/', $poll_device['sysDescr'], $regexp_result)) {
    $version = $regexp_result[1];
    $serial  = $regexp_result[2];

    // for PBN CPE 120/121
}
else if (strstr($poll_device['sysObjectID'], '.1.3.6.1.4.1.11606.24.1.1.10')) {
    $version  = str_replace(array('"'), '', snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.6.0', '-Ovq'));
    $hardware = str_replace(array('"'), '', snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.7.0', '-Ovq'));
    $features = str_replace(array('"'), '', snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.10.0', '-Ovq'));
    // normalize MAC address (serial)
    $serial   = str_replace(array(' ', ':', '-', '"'), '', strtolower(snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.4.0', '-Ovq')));
}