Added Poller modules for Cisco Voice Routers

Added the following modules:
- Cisco PRI - graphs the total and inuse Primary Rate ISDN channels.
- Cisco DSP - graphs the total and inuse Digital Signal Processor (DSP) resources.
- Cisco MTP - graphs the total and inuse Media Termination Point (MTP) resources.
- Cisco XCode - graphs the total and inuse Transcoder resources.

includes/polling/cisco-xcode.inc.php

@@ -0,0 +1,37 @@
+<?php
+/*
+   * LibreNMS module to Graph Transcoder Resources in a Cisco Voice Router
+   *
+   * Copyright (c) 2015 Aaron Daniels <aaron@daniels.id.au>
+   *
+   * This program is free software: you can redistribute it and/or modify it
+   * under the terms of the GNU General Public License as published by the
+   * Free Software Foundation, either version 3 of the License, or (at your
+   * option) any later version.  Please see LICENSE.txt at the top level of
+   * the source code distribution for details.
+   */
+
+if ($device['os_group'] == "cisco") {
+    // Total
+    $total = snmpwalk_cache_oid_num ($device, "1.3.6.1.4.1.9.9.86.1.7.1.0", NULL);
+    $total = $total['1.3.6.1.4.1.9.9.86.1.7.1.0'][''];
+
+    if (isset($total) && ($total != "") && ($total != 0)) {
+        // Available
+        $available = snmpwalk_cache_oid_num ($device, "1.3.6.1.4.1.9.9.86.1.7.2.0", NULL);
+        $available = $available['1.3.6.1.4.1.9.9.86.1.7.2.0'][''];
+
+        // Active
+        $active = $total - $available;
+
+        $rrd_filename = $config['rrd_dir'] . "/" . $device['hostname'] . "/" . safename ("cisco-xcode.rrd");
+        if (!file_exists ($rrd_filename)) {
+            rrdtool_create ($rrd_filename, " DS:total:GAUGE:600:0:U DS:active:GAUGE:600:0:U" . $config['rrd_rra']);
+        }
+        rrdtool_update ($rrd_filename, "N:" . $total . ":" . $active);
+
+        $graphs['cisco-xcode'] = TRUE;
+        echo (" Cisco Transcoder ");
+    }
+    unset($rrd_filename, $total, $active, $available);
+}