diff -urN asterisk-1.2.13.orig/res/res_watchdog.c asterisk-1.2.13/res/res_watchdog.c
--- asterisk-1.2.13.orig/res/res_watchdog.c	1970-01-01 01:00:00.000000000 +0100
+++ asterisk-1.2.13/res/res_watchdog.c	2006-10-19 11:11:39.000000000 +0200
@@ -0,0 +1,149 @@
+/*
+ * Asterisk -- A telephony toolkit for Linux.
+ *
+ * Resource to make watchdogs happy
+ *
+ * Copyright (C) 2005, Junghanns.NET GmbH
+ *
+ * Klaus-Peter Junghanns <kpj@junghanns.net>
+ *
+ * This program is free software, distributed under the terms of
+ * the GNU General Public License
+ */
+
+#include <stdlib.h>
+#include <errno.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <sys/time.h>
+#include <sys/signal.h>
+#include <netinet/in.h>
+#include <asterisk/lock.h>
+#include <asterisk/file.h>
+#include <asterisk/logger.h>
+#include <asterisk/channel.h>
+#include <asterisk/pbx.h>
+#include <asterisk/options.h>
+#include <asterisk/module.h>
+#include <asterisk/translate.h>
+#include <asterisk/say.h>
+#include <asterisk/features.h>
+#include <asterisk/musiconhold.h>
+#include <asterisk/config.h>
+#include <asterisk/cli.h>
+#include <asterisk/manager.h>
+#include <asterisk/utils.h>
+#include <asterisk/adsi.h>
+
+static struct watchdog_pvt *watchdogs = NULL;
+
+STANDARD_LOCAL_USER;
+
+LOCAL_USER_DECL;
+
+typedef struct watchdog_pvt {
+    char device[80];
+    int fd;
+    int type;
+    int interval;
+    pthread_t watchdog_thread;
+    struct watchdog_pvt *next;
+} watchdog_pvt;
+
+static void *do_watchdog_thread(void *data) {
+    struct watchdog_pvt *woof = (struct watchdog_pvt *)data;
+    for (;;) {
+	if (woof->fd) {
+	    write(woof->fd, "PING\n", 1);
+	}
+	usleep(woof->interval * 1000);
+    }
+    return NULL;
+}
+
+
+int load_module(void)
+{
+	int res = 0;
+	char *cat, *utype, *udevice, *uinterval;
+	struct ast_config *cfg;
+	struct watchdog_pvt *woof = NULL;
+
+	cfg = ast_config_load("watchdog.conf");
+	if (cfg) {
+	    cat = ast_category_browse(cfg, NULL);
+	    while(cat) {
+		cat = ast_category_browse(cfg, cat);
+		utype = ast_variable_retrieve(cfg, cat, "type");
+/*		if (utype) {
+		    ast_log(LOG_NOTICE, "type = %s\n", utype);
+		} */
+		udevice = ast_variable_retrieve(cfg, cat, "device");
+/*		if (udevice) {
+		    ast_log(LOG_NOTICE, "device = %s\n", udevice);
+		} */
+		uinterval = ast_variable_retrieve(cfg, cat, "interval");
+/*		if (uinterval) {
+		    ast_log(LOG_NOTICE, "interval = %s\n", uinterval);
+		} */
+		if (uinterval && udevice && utype) {
+		    woof = malloc(sizeof(struct watchdog_pvt));
+		    if (!woof) {
+			ast_log(LOG_ERROR, "unable to malloc!\n");
+			return -1;
+		    }
+		    memset(woof, 0x0, sizeof(struct watchdog_pvt));
+		    strncpy(woof->device, udevice, sizeof(woof->device) - 1);
+		    
+		    woof->interval = atoi(uinterval);;
+		    woof->next = watchdogs;
+		    watchdogs = woof;
+		    woof->fd = open(woof->device, O_WRONLY | O_SYNC);
+		    if (woof->fd) {
+			if (!strncmp(utype, "isdnguard", sizeof(utype))) {
+			    woof->type = 1;
+			    write(woof->fd, "START\n", 6);
+			}
+			ast_pthread_create(&woof->watchdog_thread, NULL, do_watchdog_thread, woof);
+		    } else {
+			ast_log(LOG_WARNING, "error opening watchdog device %s !\n", woof->device);
+		    }
+		}
+	    }
+    	    ast_config_destroy(cfg);
+	}
+	return res;
+}
+
+
+int unload_module(void)
+{
+	struct watchdog_pvt *dogs, *woof;
+	STANDARD_HANGUP_LOCALUSERS;
+	dogs = watchdogs;
+	while (dogs) {
+	    pthread_cancel(dogs->watchdog_thread);
+	    close(dogs->fd);
+	    woof = dogs->next;
+	    free(dogs);
+	    dogs = woof;
+	}
+	return 0;
+}
+
+char *description(void)
+{
+	return "Watchdog Resource";
+}
+
+int usecount(void)
+{
+	return 1;
+}
+
+char *key()
+{
+	return ASTERISK_GPL_KEY;
+}
diff -urN asterisk-1.2.13.orig/configs/watchdog.conf.sample asterisk-1.2.13/configs/watchdog.conf.sample
--- asterisk-1.2.13.orig/configs/watchdog.conf.sample	1970-01-01 01:00:00.000000000 +0100
+++ asterisk-1.2.13/configs/watchdog.conf.sample	2006-10-19 11:11:39.000000000 +0200
@@ -0,0 +1,22 @@
+;
+; Configuration file for res_watchdog
+;
+; type     = isdnguard | watchdog
+; device   = /dev/...
+; interval = interval to trigger the watchdog in ms
+
+;[ISDNguard-direct]
+;type = isdnguard
+;device = /dev/ttyS0
+;interval = 200
+
+;[ISDNguard-with-daemon]
+;type = isdnguard
+;device = /var/run/guard.ctl
+;interval = 200
+
+;[kernel_watchdog]
+;type = watchdog
+;device = /dev/watchdog
+;interval = 100
+
diff -urN asterisk-1.2.13.orig/res/Makefile asterisk-1.2.13/res/Makefile
--- asterisk-1.2.13.orig/res/Makefile	2005-11-29 19:24:39.000000000 +0100
+++ asterisk-1.2.13/res/Makefile	2006-10-19 11:11:39.000000000 +0200
@@ -11,7 +11,7 @@
 # the GNU General Public License
 #
 
-MODS=res_indications.so res_monitor.so res_adsi.so res_agi.so res_features.so
+MODS=res_indications.so res_monitor.so res_adsi.so res_agi.so res_features.so res_watchdog.so
 
 ifneq ($(wildcard $(CROSS_COMPILE_TARGET)/usr/include/odbcinst.h)$(wildcard $(CROSS_COMPILE_TARGET)/usr/local/include/odbcinst.h),)
   ifneq (${OSARCH},FreeBSD)