diff --git a/install.sh b/install.sh
index c5bfd8b..1351280 100755
--- a/install.sh
+++ b/install.sh
@@ -488,10 +488,10 @@ EOF
 chmod 0644 /etc/cron.d/nexus-backup
 touch /var/log/nexus_backup.log && chown www-data:asterisk /var/log/nexus_backup.log && chmod 664 /var/log/nexus_backup.log
 
-# Cron synchronisation Cluster HA toutes les 5 minutes
+# Cron synchronisation Cluster HA toutes les 2 minutes (synchronisation base + astdb contacts)
 cat << 'EOF' > /etc/cron.d/nexus-cluster-sync
 # Synchronisation périodique du cluster NexusPBX HA vers le nœud Backup
-*/5 * * * * www-data /usr/bin/php /var/www/nexus-pbx/scripts/nexus_cluster_sync.php >> /var/log/nexus_cluster.log 2>&1
+*/2 * * * * www-data /usr/bin/php /var/www/nexus-pbx/scripts/nexus_cluster_sync.php >> /var/log/nexus_cluster.log 2>&1
 EOF
 chmod 0644 /etc/cron.d/nexus-cluster-sync
 
diff --git a/scripts/nexus_cluster_sync.php b/scripts/nexus_cluster_sync.php
index af9a014..7a64955 100644
--- a/scripts/nexus_cluster_sync.php
+++ b/scripts/nexus_cluster_sync.php
@@ -44,3 +44,4 @@ try {
     echo date('[Y-m-d H:i:s] ') . "[CLUSTER-CRON-ERROR] " . $e->getMessage() . "\n";
     exit(1);
 }
+
diff --git a/src/ClusterManager.php b/src/ClusterManager.php
index 5e77e93..462b7cc 100644
--- a/src/ClusterManager.php
+++ b/src/ClusterManager.php
@@ -464,11 +464,30 @@ class ClusterManager
         $this->db->exec('PRAGMA wal_checkpoint(FULL);');
 
         $tmpArchive = '/tmp/nexus_cluster_sync_' . time() . '.tar.gz';
+        $tmpAstdb = '/tmp/astdb_cluster_sync.sqlite3';
+        $hasAstdb = false;
+
+        // Sauvegarde intègre et atomique de la base de contacts Asterisk (astdb.sqlite3)
+        $astdbPath = '/var/lib/asterisk/astdb.sqlite3';
+        if (file_exists($astdbPath) && is_readable($astdbPath)) {
+            @unlink($tmpAstdb);
+            shell_exec("sqlite3 " . escapeshellarg($astdbPath) . " \".backup " . escapeshellarg($tmpAstdb) . "\" 2>/dev/null || cp -f " . escapeshellarg($astdbPath) . " " . escapeshellarg($tmpAstdb) . " 2>/dev/null || true");
+            if (file_exists($tmpAstdb) && filesize($tmpAstdb) > 0) {
+                $hasAstdb = true;
+            }
+        }
+
         $cmd = "tar -czf " . escapeshellarg($tmpArchive) . " -C /var/www/nexus-pbx/storage database.sqlite";
         if (is_dir('/var/lib/asterisk/sounds/custom')) {
             $cmd .= " -C /var/lib/asterisk/sounds custom";
         }
+        if ($hasAstdb) {
+            $cmd .= " -C /tmp astdb_cluster_sync.sqlite3";
+        }
         shell_exec($cmd);
+        if ($hasAstdb) {
+            @unlink($tmpAstdb);
+        }
 
         if (!file_exists($tmpArchive) || filesize($tmpArchive) === 0) {
             @unlink($tmpArchive);
@@ -599,6 +618,15 @@ class ClusterManager
         if (is_dir('/var/lib/asterisk/sounds')) {
             shell_exec("tar -xzf " . escapeshellarg($tmpArchive) . " -C /var/lib/asterisk/sounds custom 2>/dev/null || true");
         }
+        // Restauration de l'astdb (contacts et IP actives des téléphones PJSIP)
+        shell_exec("tar -xzf " . escapeshellarg($tmpArchive) . " -C /tmp astdb_cluster_sync.sqlite3 2>/dev/null || true");
+        if (file_exists('/tmp/astdb_cluster_sync.sqlite3')) {
+            copy('/tmp/astdb_cluster_sync.sqlite3', '/var/lib/asterisk/astdb.sqlite3');
+            @chown('/var/lib/asterisk/astdb.sqlite3', 'asterisk');
+            @chgrp('/var/lib/asterisk/astdb.sqlite3', 'asterisk');
+            @chmod('/var/lib/asterisk/astdb.sqlite3', 0664);
+            @unlink('/tmp/astdb_cluster_sync.sqlite3');
+        }
         @unlink($tmpArchive);
 
         // Réouverture de la connexion DB