librenms-librenms/includes/discovery/os/3com.inc.php

<?php

if (!$os) {
    if (strstr($sysDescr, '3Com Switch ')) {
        $os = '3com';
    }
    else if (strstr($sysDescr, '3Com SuperStack')) {
        $os = '3com';
    }
    else if (strstr($sysDescr, '3Com Baseline')) {
        $os = '3com';
    }
}