diff --git a/includes/alerts.inc.php b/includes/alerts.inc.php
new file mode 100755
index 0000000000..45a3373fed
--- /dev/null
+++ b/includes/alerts.inc.php
@@ -0,0 +1,112 @@
+<?php
+
+/**
+ * Observium Network Management and Monitoring System
+ * Copyright (C) 2006-2012, Adam Armstrong - http://www.observium.org
+ *
+ * @package alerting
+ * @author Adam Armstrong <adama@memetic.org>
+ *
+ */
+
+
+/**
+ * Build a cache of default alert conditions
+ *
+ * @return array
+*/
+
+function cache_conditions_global() {
+  $cache = array();
+  foreach (dbFetchRows("SELECT * FROM `alert_conditions_global`") as $entry)
+  {
+    $cache[$entry['type']][$entry['subtype']][$entry['metric']][] = array('operator' => $entry['operator'], 'value' => $entry['value'],
+                                                                          'severity' => $entry['severity'], 'alerter' => $entry['alerter'], 'enable' => $entry['enable']);
+  }
+  return $cache;
+}
+
+/**
+ * Build a cache of device-specific alert conditions
+ *
+ * @return array
+ * @param device_id
+*/
+
+function cache_conditions_device($device_id) {
+
+  $cache = array();
+  foreach (dbFetchRows("SELECT * FROM `alert_conditions` WHERE `device_id` = ?", array($device_id)) as $entry)
+  {
+    $cache[$entry['type']][$entry['subtype']][$entry['entity']][$entry['metric']][] = array('condition' => $entry['operator'], 'value' => $entry['value'],
+                                                                                            'severity' => $entry['severity'], 'alerter' => $entry['alerter'],
+                                                                                            'enable' => $entry['enable']);
+  }
+  return $cache;
+}
+
+/**
+ * Compare two values
+ *
+ * @return integer
+ * @param value_a
+ * @param condition
+ * @param value_b
+*/
+
+function test_condition($value_a, $condition, $value_b)
+{
+      switch($condition)
+      {
+        case ">":
+         if($value_a > $value_b) { $alert = 1; } else { $alert = 0; }
+         break;
+        case "<":
+         if($value_a < $value_b) { $alert = 1; } else { $alert = 0; }
+         break;
+        case "!=":
+         if($value_a != $value_b) { $alert = 1; } else { $alert = 0; }
+         break;
+        case "=":
+         if($value_a = $value_b) { $alert = 1; } else { $alert = 0; }
+         break;
+        default:
+         $alert = -1;
+         break;
+      }
+      return $alert;
+}
+
+/**
+ * Check entity data against alert conditions
+ *
+ * @param value_a
+ * @param condition
+ * @param value_b
+*/
+
+function check_entity($device, $entity_type, $entity_id, $data)
+{
+  global $glo_conditions;
+  global $dev_conditions;
+
+  if(!empty($entity_id)) { echo(" $entity_id"); }
+
+  foreach($data as $name => $value)
+  {
+    foreach($dev_conditions[$entity_type][$entity_id][$name] as $condition)
+    {
+      $alert = test_condition($value, $condition['condition'], $condition['value']);
+      if($alert == 1)
+      {
+        echo("ALERT ");
+      } else {
+        echo("OK ");
+      }
+    }
+  }
+}
+
+
+
+?>