diff --git a/frontend/pages/communication/phone.vue b/frontend/pages/communication/phone.vue
index 0ed50a8..89e2f22 100644
--- a/frontend/pages/communication/phone.vue
+++ b/frontend/pages/communication/phone.vue
@@ -23,6 +23,17 @@ const sipError = ref(null)
 const incomingCall = ref(null)
 const callState = ref("idle")
 const registererState = ref("Initial")
+const sipEvents = ref([])
+
+const addSipEvent = (message) => {
+  sipEvents.value = [
+    {
+      time: new Date().toLocaleTimeString("de-DE"),
+      message,
+    },
+    ...sipEvents.value,
+  ].slice(0, 8)
+}
 
 const selectedAccount = computed(() =>
   (config.value?.testAccounts || []).find((account) => account.extension === selectedExtension.value)
@@ -254,6 +265,7 @@ const registerSip = async () => {
     if (!uri) throw new Error("SIP-URI konnte nicht erstellt werden.")
 
     const handleIncomingInvite = (invitation) => {
+      addSipEvent(`INVITE von ${invitation.remoteIdentity?.uri?.user || "unbekannt"} empfangen`)
       incomingCall.value = invitation
       setupSession(invitation, "incoming")
 
@@ -270,18 +282,37 @@ const registerSip = async () => {
       contactName: account.extension,
       authorizationUsername: account.extension,
       authorizationPassword: account.password,
+      logBuiltinEnabled: true,
+      logLevel: "log",
+      logConnector: (level, category, label, content) => {
+        if (category === "sip.Transport" && content.includes("Received WebSocket")) {
+          addSipEvent("SIP-Nachricht über WebSocket empfangen")
+        }
+
+        if (content.includes("INVITE")) {
+          addSipEvent(`${category}: ${content.split("\n")[0]}`)
+        }
+
+        if (level === "error" || level === "warn") {
+          addSipEvent(`${category}: ${content.split("\n")[0]}`)
+        }
+      },
       delegate: {
         onInvite: handleIncomingInvite,
         onConnect: () => {
+          addSipEvent("SIP-WebSocket verbunden")
           sipStatus.value = sipRegistered.value ? `Registriert als ${account.extension}` : "SIP-WebSocket verbunden"
         },
         onDisconnect: () => {
+          addSipEvent("SIP-WebSocket getrennt")
           sipRegistered.value = false
           sipStatus.value = "SIP-WebSocket getrennt"
         },
       },
       transportOptions: {
         server: config.value.sipWebSocketUrl,
+        keepAliveInterval: 20,
+        traceSip: true,
       },
       sessionDescriptionHandlerFactoryOptions: {
         constraints: {
@@ -302,11 +333,13 @@ const registerSip = async () => {
       registererState.value = state
 
       if (state === sip.RegistererState.Registered) {
+        addSipEvent(`Registrierung ${account.extension}: Registered`)
         sipRegistered.value = true
         sipStatus.value = `Registriert als ${account.extension}`
       }
 
       if (state === sip.RegistererState.Unregistered || state === sip.RegistererState.Terminated) {
+        addSipEvent(`Registrierung ${account.extension}: ${state}`)
         sipRegistered.value = false
         sipStatus.value = "Nicht verbunden"
       }
@@ -319,6 +352,7 @@ const registerSip = async () => {
     await reg.register({
       requestDelegate: {
         onAccept: () => {
+          addSipEvent(`REGISTER ${account.extension}: 200 OK`)
           sipRegistered.value = true
           sipStatus.value = `Registriert als ${account.extension}`
           registererState.value = sip.RegistererState.Registered
@@ -327,6 +361,7 @@ const registerSip = async () => {
           sipRegistered.value = false
           sipStatus.value = "Registrierung abgelehnt"
           sipError.value = `Asterisk hat REGISTER mit HTTP/SIP ${response.message.statusCode} abgelehnt.`
+          addSipEvent(`REGISTER ${account.extension}: ${response.message.statusCode}`)
         },
       },
     })
@@ -576,6 +611,25 @@ onBeforeUnmount(() => {
               </UBadge>
             </div>
 
+            <div
+              v-if="sipEvents.length"
+              class="mt-4 rounded-lg border border-gray-200 bg-gray-50 p-3"
+            >
+              <p class="text-xs font-medium uppercase text-gray-500">
+                SIP-Ereignisse
+              </p>
+              <ul class="mt-2 space-y-1 text-xs text-gray-600">
+                <li
+                  v-for="event in sipEvents"
+                  :key="`${event.time}-${event.message}`"
+                  class="grid grid-cols-[4.5rem_1fr] gap-2"
+                >
+                  <span class="font-mono text-gray-400">{{ event.time }}</span>
+                  <span class="break-words">{{ event.message }}</span>
+                </li>
+              </ul>
+            </div>
+
             <UAlert
               v-if="incomingCall"
               class="mt-4"
diff --git a/telephony/asterisk/pjsip.conf b/telephony/asterisk/pjsip.conf
index 581c8dd..2dda7d7 100644
--- a/telephony/asterisk/pjsip.conf
+++ b/telephony/asterisk/pjsip.conf
@@ -46,6 +46,8 @@ password=fedeo-test-1001
 type=aor
 max_contacts=5
 remove_existing=yes
+support_path=yes
+qualify_frequency=30
 
 [1002](fedeo-webrtc)
 auth=1002-auth
@@ -62,3 +64,5 @@ password=fedeo-test-1002
 type=aor
 max_contacts=5
 remove_existing=yes
+support_path=yes
+qualify_frequency=30