yes

module.nix

@@ -0,0 +1,49 @@
+{
+  config,
+  pkgs,
+  lib,
+  modulesPath,
+  ...
+}:
+
+let
+  asteriskDir = ./asterisk;
+  asteriskFiles = builtins.readDir asteriskDir;
+  fileNames = builtins.attrNames asteriskFiles;
+  entries = builtins.map (name: {
+    name = name;
+    path = "${asteriskDir}/${name}";
+  }) fileNames;
+in
+{
+  config =
+    let
+      configFarm = pkgs.linkFarm "asterisk-config" entries;
+    in
+    {
+      services.getty.autologinUser = "root";
+
+      systemd.services.asterisk = {
+        wantedBy = [ "multi-user.target" ];
+        serviceConfig = {
+          ExecStart = "${pkgs.asterisk}/bin/asterisk -f -C ${configFarm}/asterisk.conf";
+          Restart = "on-failure";
+          User = "asterisk";
+        };
+      };
+
+      users.users.asterisk = {
+        isSystemUser = true;
+        group = "asterisk";
+      };
+      users.groups.asterisk = { };
+
+      environment.etc."asterisk".source = configFarm;
+
+      networking.firewall.allowedTCPPorts = [ 5060 ];
+      networking.firewall.allowedUDPPorts = [
+        5060
+        4569
+      ];
+    };
+}