diff --git a/ops/nixos/bvm-prosody/asterisk-override.nix b/ops/nixos/bvm-prosody/asterisk-override.nix
new file mode 100644
index 0000000000..87083ab931
--- /dev/null
+++ b/ops/nixos/bvm-prosody/asterisk-override.nix
@@ -0,0 +1,14 @@
+{ asterisk, fetchFromGitHub, fetchpatch, ... }:
+
+asterisk.overrideAttrs (old: {
+  #src = /home/lukegb/Projects/asterisk;
+  #patches = [ /home/lukegb/Projects/asterisk.patch ];
+  patches = [
+    #(fetchpatch {
+    #  url = "https://p.lukegb.com/raw/MultiplyMagicalKoi.patch";
+    #  sha256 = "056iy9415xyp9g69xs8ckyvccs8sskc7zp7frnwrvl7wlxnsf2va";
+    #})
+    /home/lukegb/Projects/asterisk.patch
+  ];
+  enableParallelBuilding = true;
+})
diff --git a/ops/nixos/bvm-prosody/default.nix b/ops/nixos/bvm-prosody/default.nix
index b70f1a1827..a215d351a9 100644
--- a/ops/nixos/bvm-prosody/default.nix
+++ b/ops/nixos/bvm-prosody/default.nix
@@ -6,6 +6,7 @@
 {
   imports = [
     ../lib/bvm.nix
+    ./eventphone-asterisk.nix
   ];
 
   # Networking!
@@ -58,9 +59,6 @@
   services.prosody = {
     enable = true;
     admins = [ "admin@lukegb.com" "lukegb@lukegb.com" ];
-    package = pkgs.prosody.override {
-      withCommunityModules = [ "external_services" ];
-    };
 
     virtualHosts."lukegb.com" = {
       enabled = true;
@@ -112,6 +110,9 @@
                       secret = turn_secret,
               }
       }
+
+      Component "asterisk.lukegb.com"
+        component_secret = "thisisasampleofspeex"
     '';
   };
 
diff --git a/ops/nixos/bvm-prosody/eventphone-asterisk.nix b/ops/nixos/bvm-prosody/eventphone-asterisk.nix
new file mode 100644
index 0000000000..e26bccd10b
--- /dev/null
+++ b/ops/nixos/bvm-prosody/eventphone-asterisk.nix
@@ -0,0 +1,100 @@
+# SPDX-FileCopyrightText: 2020 Luke Granger-Brown <depot@lukegb.com>
+#
+# SPDX-License-Identifier: Apache-2.0
+
+{ depot, lib, pkgs, config, ... }:
+
+{
+  services.asterisk = {
+    enable = true;
+    confFiles = {
+      "pjsip.conf" = ''
+        [transport-udp]
+        type=transport
+        protocol=udp
+        bind=92.118.28.3
+
+        [transport-udp-v6]
+        type=transport
+        protocol=udp
+        bind=2a09:a441::3
+
+        [eventphone-registration]
+        type=registration
+        transport=transport-udp
+        outbound_auth=eventphone-auth
+        server_uri=sip:voip.eventphone.de
+        client_uri=sip:5422@voip.eventphone.de
+        contact_user=5422
+        retry_interval=60
+        forbidden_retry_interval=600
+        expiration=3600
+        line=yes
+        endpoint=eventphone
+
+        [eventphone-auth]
+        type=auth
+        auth_type=userpass
+        username=5422
+        password=BPun1r0l7JJZ
+        realm=voip.eventphone.de
+
+        [eventphone]
+        type=endpoint
+        allow=!all,ulaw,alaw
+        context=eventphone-incoming
+        outbound_auth=eventphone-auth
+        transport=transport-udp
+        aors=eventphone-aor
+        from_domain=voip.eventphone.de
+
+        [eventphone-aor]
+        type=aor
+        contact=sip:voip.eventphone.de
+        max_contacts=10
+
+        [eventphone-identify]
+        type=identify
+        endpoint=eventphone
+        match=45.15.105.12/32
+      '';
+      "motif.conf" = ''
+        [default](!)
+        disallow=all
+        allow=ulaw
+        allow=h264
+        context=incoming-motif
+
+        [prosody](default)
+        transport=ice-udp
+        connection=prosody
+      '';
+      "xmpp.conf" = ''
+        [general]
+        debug=yes
+
+        [prosody]
+        type=component
+        serverhost=localhost
+        username=asterisk.lukegb.com
+        secret=thisisasampleofspeex
+        port=5347
+        context=xmpp-incoming
+        debug=yes
+        usetls=no
+        usesasl=no
+        autoregister=yes
+        buddy=lukegb@lukegb.com
+      '';
+      "extensions.conf" = ''
+        [eventphone-incoming]
+        exten => _X.,1,Answer()
+        exten => _X.,n,Dial(Motif/prosody/lukegb@lukegb.com)
+
+        [xmpp-incoming]
+        exten => _X.,1,Dial(PJSIP/''${EXTEN:1}@eventphone)
+      '';
+    };
+    package = pkgs.callPackage ./asterisk-override.nix {};
+  };
+}