diff --git a/src/Anrufmonitor.App/App.xaml.cs b/src/Anrufmonitor.App/App.xaml.cs
index 9b1b80b..90c3f53 100644
--- a/src/Anrufmonitor.App/App.xaml.cs
+++ b/src/Anrufmonitor.App/App.xaml.cs
@@ -79,13 +79,20 @@ public partial class App : System.Windows.Application
         var logger = _host.Services.GetRequiredService<ILogger<App>>();
         var cache = _host.Services.GetRequiredService<ContactCache>();
 
+        CallPopupWindow.Corner = _host.Services.GetRequiredService<IConfiguration>()["Popup:Corner"] ?? "BottomRight";
+        var endedCallIds = new HashSet<string>();
+
         _trayIconManager = new TrayIconManager(
             onSyncNow: async () =>
             {
                 var syncService = _host.Services.GetRequiredService<ContactSyncService>();
                 await syncService.SyncOnceAsync(CancellationToken.None);
             },
-            onShowHistory: () => CallHistoryWindow.ShowAsync(cache),
+            onShowHistory: () =>
+            {
+                _trayIconManager?.StopAttention();
+                return CallHistoryWindow.ShowAsync(cache);
+            },
             onExit: () => System.Windows.Application.Current.Shutdown());
         _trayIconManager.Show();
 
@@ -112,6 +119,12 @@ public partial class App : System.Windows.Application
 
                 System.Windows.Application.Current.Dispatcher.Invoke(() =>
                 {
+                    // Anruf war schon beendet, bevor der Kontakt aufgeloest war: kein Popup mehr noetig
+                    if (endedCallIds.Remove(args.CallId))
+                    {
+                        return;
+                    }
+
                     var popup = new CallPopupWindow(contact, args.CallId, args.CalledNumber);
                     popup.Show();
                 });
@@ -127,6 +140,10 @@ public partial class App : System.Windows.Application
             System.Windows.Application.Current.Dispatcher.Invoke(() =>
             {
                 CallPopupWindow.CloseByCallId(args.CallId);
+                endedCallIds.Add(args.CallId);
+
+                // Klingeln beendet: Tray-Icon blinkt, bis die Anrufliste geoeffnet wird.
+                _trayIconManager?.StartAttention();
             });
         };
 
diff --git a/src/Anrufmonitor.App/CallPopupWindow.xaml b/src/Anrufmonitor.App/CallPopupWindow.xaml
index 329427d..67e6c4c 100644
--- a/src/Anrufmonitor.App/CallPopupWindow.xaml
+++ b/src/Anrufmonitor.App/CallPopupWindow.xaml
@@ -1,40 +1,46 @@
-<Window x:Class="Anrufmonitor.App.CallPopupWindow"
+<Window x:Class="Anrufmonitor.App.CallPopupWindow"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         Title="Anrufmonitor"
-        Width="360" Height="160"
+        Width="380" Height="190"
         WindowStyle="None"
         AllowsTransparency="True"
         Background="Transparent"
         ShowInTaskbar="False"
         Topmost="True"
+        ShowActivated="False"
         ResizeMode="NoResize"
         SizeToContent="Manual">
-    <Border Background="#FF1F2430" CornerRadius="10" BorderBrush="#FF3A4152" BorderThickness="1">
-        <Grid Margin="16">
-            <Grid.RowDefinitions>
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="Auto" />
-                <RowDefinition Height="Auto" />
-            </Grid.RowDefinitions>
+    <Grid Margin="10">
+        <Border Background="White" CornerRadius="10" BorderBrush="#FFFF8C00" BorderThickness="4">
+            <Border.Effect>
+                <DropShadowEffect BlurRadius="14" ShadowDepth="0" Opacity="0.55" Color="Black" />
+            </Border.Effect>
+            <Grid Margin="16,12,16,12">
+                <Grid.RowDefinitions>
+                    <RowDefinition Height="Auto" />
+                    <RowDefinition Height="Auto" />
+                    <RowDefinition Height="Auto" />
+                    <RowDefinition Height="Auto" />
+                </Grid.RowDefinitions>
 
-            <TextBlock Grid.Row="0" Text="Eingehender Anruf" Foreground="#FF8CA0C4" FontSize="12" FontWeight="SemiBold" />
+                <TextBlock Grid.Row="0" Text="📞 Eingehender Anruf" Foreground="#FFE67300" FontSize="13" FontWeight="Bold" />
 
-            <TextBlock Grid.Row="1" x:Name="NameText" Text="Unbekannt" Foreground="White" FontSize="22" FontWeight="Bold"
-                       Margin="0,4,0,0" TextTrimming="CharacterEllipsis" />
+                <TextBlock Grid.Row="1" x:Name="NameText" Text="Unbekannt" Foreground="#FF111111" FontSize="24" FontWeight="Bold"
+                           Margin="0,4,0,0" TextTrimming="CharacterEllipsis" />
 
-            <StackPanel Grid.Row="2" Orientation="Horizontal" Margin="0,4,0,0">
-                <TextBlock x:Name="CompanyText" Foreground="#FFB6C0D6" FontSize="14" Margin="0,0,8,0" />
-                <TextBlock x:Name="NumberText" Foreground="#FF7C879C" FontSize="14" />
-            </StackPanel>
+                <StackPanel Grid.Row="2" Orientation="Horizontal" Margin="0,4,0,0">
+                    <TextBlock x:Name="CompanyText" Foreground="#FF333333" FontSize="14" Margin="0,0,8,0" />
+                    <TextBlock x:Name="NumberText" Foreground="#FF555555" FontSize="14" />
+                </StackPanel>
 
-            <TextBlock Grid.Row="3" x:Name="CalledText" Foreground="#FF8CA0C4" FontSize="12" Margin="0,6,0,0" />
+                <TextBlock Grid.Row="3" x:Name="CalledText" Foreground="#FFE67300" FontSize="13" FontWeight="SemiBold" Margin="0,6,0,0" />
 
-            <Button Content="✕" HorizontalAlignment="Right" VerticalAlignment="Top"
-                    Width="24" Height="24" Padding="0" Margin="0,-16,-16,0"
-                    Background="Transparent" BorderThickness="0" Foreground="#FF7C879C"
-                    Click="OnCloseClicked" />
-        </Grid>
-    </Border>
+                <Button Content="✕" HorizontalAlignment="Right" VerticalAlignment="Top"
+                        Width="24" Height="24" Padding="0" Margin="0,-6,-6,0"
+                        Background="Transparent" BorderThickness="0" Foreground="#FF555555"
+                        Click="OnCloseClicked" />
+            </Grid>
+        </Border>
+    </Grid>
 </Window>
diff --git a/src/Anrufmonitor.App/CallPopupWindow.xaml.cs b/src/Anrufmonitor.App/CallPopupWindow.xaml.cs
index d280df4..0c95cf9 100644
--- a/src/Anrufmonitor.App/CallPopupWindow.xaml.cs
+++ b/src/Anrufmonitor.App/CallPopupWindow.xaml.cs
@@ -5,16 +5,19 @@ using Anrufmonitor.Contacts;
 namespace Anrufmonitor.App;
 
 /// <summary>
-/// Toast-artiges Popup unten rechts, zeigt den (per <see cref="ContactLookupService"/>
-/// aufgeloesten) Anrufer an. Schliesst sich automatisch nach <see cref="AutoCloseAfter"/>
-/// oder wenn der Anruf beendet wird (<see cref="CloseByCallId"/>, ausgeloest durch
-/// SIP CANCEL/Ring-Timeout).
+/// Popup, zeigt den (per <see cref="ContactLookupService"/> aufgeloesten) Anrufer an.
+/// Bleibt offen, solange es klingelt: geschlossen wird per <see cref="CloseByCallId"/>
+/// (SIP CANCEL/Ring-Timeout) oder per X. <see cref="AutoCloseAfter"/> ist nur eine
+/// Sicherung, falls das Ende des Anrufs nie signalisiert wird.
 /// </summary>
 public partial class CallPopupWindow : Window
 {
-    private static readonly TimeSpan AutoCloseAfter = TimeSpan.FromSeconds(20);
+    private static readonly TimeSpan AutoCloseAfter = TimeSpan.FromMinutes(2);
     private static readonly Dictionary<string, CallPopupWindow> OpenPopups = new();
 
+    /// <summary>Bildschirmecke fuer das Popup (Konfiguration "Popup:Corner"): BottomRight, BottomLeft, TopRight, TopLeft.</summary>
+    public static string Corner { get; set; } = "BottomRight";
+
     private readonly string _callId;
     private readonly DispatcherTimer _autoCloseTimer;
 
@@ -33,7 +36,7 @@ public partial class CallPopupWindow : Window
         CompanyText.Visibility = string.IsNullOrWhiteSpace(contact.Company) ? Visibility.Collapsed : Visibility.Visible;
         NumberText.Text = contact.PhoneNumbers.Count > 0 ? contact.PhoneNumbers[0] : string.Empty;
 
-        PositionBottomRight();
+        PositionOnScreen();
 
         _autoCloseTimer = new DispatcherTimer { Interval = AutoCloseAfter };
         _autoCloseTimer.Tick += (_, _) => Close();
@@ -57,11 +60,18 @@ public partial class CallPopupWindow : Window
         }
     }
 
-    private void PositionBottomRight()
+    private void PositionOnScreen()
     {
-        var workArea = SystemParameters.WorkArea;
-        Left = workArea.Right - Width - 16;
-        Top = workArea.Bottom - Height - 16;
+        // Mehrere gleichzeitige Popups werden gestapelt statt uebereinander gelegt.
+        var stackIndex = Math.Max(0, OpenPopups.Count - 1);
+        var offset = stackIndex * (Height - 20);
+
+        var area = SystemParameters.WorkArea;
+        var right = Corner.EndsWith("Right", StringComparison.OrdinalIgnoreCase);
+        var bottom = Corner.StartsWith("Bottom", StringComparison.OrdinalIgnoreCase);
+
+        Left = right ? area.Right - Width : area.Left;
+        Top = bottom ? area.Bottom - Height - offset : area.Top + offset;
     }
 
     private void OnCloseClicked(object sender, RoutedEventArgs e) => Close();
diff --git a/src/Anrufmonitor.App/TrayIconFactory.cs b/src/Anrufmonitor.App/TrayIconFactory.cs
index 37cad4d..1576653 100644
--- a/src/Anrufmonitor.App/TrayIconFactory.cs
+++ b/src/Anrufmonitor.App/TrayIconFactory.cs
@@ -14,11 +14,13 @@ public static class TrayIconFactory
     public static readonly Color ConnectedColor = Color.FromArgb(255, 76, 175, 80);
     public static readonly Color DisconnectedColor = Color.FromArgb(255, 229, 57, 53);
     public static readonly Color UnknownColor = Color.FromArgb(255, 158, 158, 158);
+    public static readonly Color AttentionColor = Color.FromArgb(255, 255, 140, 0);
 
     [DllImport("user32.dll", SetLastError = true)]
     private static extern bool DestroyIcon(IntPtr handle);
 
-    public static Icon CreateStatusIcon(Color dotColor)
+    /// <param name="alert">true = kompletter Kreis in Warnfarbe (zum Blinken bei neuem Anruf).</param>
+    public static Icon CreateStatusIcon(Color dotColor, bool alert = false)
     {
         using var bitmap = new Bitmap(32, 32);
         using (var g = Graphics.FromImage(bitmap))
@@ -26,7 +28,7 @@ public static class TrayIconFactory
             g.SmoothingMode = SmoothingMode.AntiAlias;
             g.Clear(Color.Transparent);
 
-            using var baseBrush = new SolidBrush(Color.FromArgb(255, 45, 55, 72));
+            using var baseBrush = new SolidBrush(alert ? AttentionColor : Color.FromArgb(255, 45, 55, 72));
             g.FillEllipse(baseBrush, 1, 1, 28, 28);
 
             using var phonePen = new Pen(Color.White, 2.5f) { StartCap = LineCap.Round, EndCap = LineCap.Round };
diff --git a/src/Anrufmonitor.App/TrayIconManager.cs b/src/Anrufmonitor.App/TrayIconManager.cs
index 53d664b..e04f420 100644
--- a/src/Anrufmonitor.App/TrayIconManager.cs
+++ b/src/Anrufmonitor.App/TrayIconManager.cs
@@ -11,7 +11,11 @@ namespace Anrufmonitor.App;
 public sealed class TrayIconManager : IDisposable
 {
     private readonly NotifyIcon _notifyIcon;
+    private readonly System.Windows.Forms.Timer _flashTimer = new() { Interval = 600 };
     private Icon? _currentIcon;
+    private Color _statusColor = TrayIconFactory.UnknownColor;
+    private bool _flashing;
+    private bool _flashOn;
 
     public TrayIconManager(Func<Task> onSyncNow, Func<Task> onShowHistory, System.Action onExit)
     {
@@ -41,19 +45,50 @@ public sealed class TrayIconManager : IDisposable
             Visible = false,
         };
         _notifyIcon.DoubleClick += async (_, _) => await onShowHistory();
+        _flashTimer.Tick += (_, _) =>
+        {
+            _flashOn = !_flashOn;
+            SetIcon(_statusColor, alert: _flashOn);
+        };
+    }
+
+    /// <summary>Laesst das Tray-Icon blinken (neuer Anruf), bis <see cref="StopAttention"/> aufgerufen wird.</summary>
+    public void StartAttention()
+    {
+        if (_flashing)
+        {
+            return;
+        }
+
+        _flashing = true;
+        _flashTimer.Start();
+    }
+
+    public void StopAttention()
+    {
+        if (!_flashing)
+        {
+            return;
+        }
+
+        _flashing = false;
+        _flashOn = false;
+        _flashTimer.Stop();
+        SetIcon(_statusColor, alert: false);
     }
 
     public void Show() => _notifyIcon.Visible = true;
 
     public void SetSipStatus(bool registered)
     {
-        SetIcon(registered ? TrayIconFactory.ConnectedColor : TrayIconFactory.DisconnectedColor);
+        _statusColor = registered ? TrayIconFactory.ConnectedColor : TrayIconFactory.DisconnectedColor;
+        SetIcon(_statusColor, alert: _flashing && _flashOn);
         _notifyIcon.Text = registered ? "Anrufmonitor - verbunden" : "Anrufmonitor - SIP getrennt";
     }
 
-    private void SetIcon(Color dotColor)
+    private void SetIcon(Color dotColor, bool alert = false)
     {
-        var newIcon = TrayIconFactory.CreateStatusIcon(dotColor);
+        var newIcon = TrayIconFactory.CreateStatusIcon(dotColor, alert);
         var oldIcon = _currentIcon;
 
         _notifyIcon.Icon = newIcon;
@@ -72,6 +107,8 @@ public sealed class TrayIconManager : IDisposable
 
     public void Dispose()
     {
+        _flashTimer.Stop();
+        _flashTimer.Dispose();
         _notifyIcon.Visible = false;
         _notifyIcon.Dispose();
         _currentIcon?.Dispose();
diff --git a/src/Anrufmonitor.App/appsettings.json b/src/Anrufmonitor.App/appsettings.json
index 6658615..6ab6355 100644
--- a/src/Anrufmonitor.App/appsettings.json
+++ b/src/Anrufmonitor.App/appsettings.json
@@ -29,6 +29,9 @@
       "_comment": "Reverse-Lookup gegen dasoertliche.de - keine offizielle API, siehe PublicDirectoryLookupProvider.cs"
     }
   },
+  "Popup": {
+    "Corner": "BottomRight"
+  },
   "Logging": {
     "LogLevel": {
       "Default": "Information",