diff --git a/includes/polling/os/pbn.inc.php b/includes/polling/os/pbn.inc.php
index 01279757ee..ba424d7e9a 100644
--- a/includes/polling/os/pbn.inc.php
+++ b/includes/polling/os/pbn.inc.php
@@ -7,8 +7,9 @@ if (preg_match('/^Pacific Broadband Networks .+\n.+ Version ([^,]+), .+\n.+\n.+\
     // for PBN CPE 120/121
 }
 else if (strstr(snmp_get($device, 'SNMPv2-MIB::sysObjectID.0', '-Ovqn'), '.1.3.6.1.4.1.11606.24.1.1.10')) {
-    $version  = snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.6.0', '-Ovq');
-    $hardware = snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.7.0', '-Ovq');
-    $features = snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.10.0', '-Ovq');
-    $serial   = snmp_get($device, '1.3.6.1.4.1.11606.24.1.1.4.0', '-Ovq');
+    $version  = str_replace(array('"'), '', snmp_get($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')));
 }